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CVE-2025-71304

📛 CVE Title

smack: /smack/doi: accept previously used values

⬇ Download JSON ⚠ View as Threat

Description

In the Linux kernel, the following vulnerability has been resolved: smack: /smack/doi: accept previously used values Writing to /smack/doi a value that has ever been written there in the past disables networking for non-ambient labels. E.g. # cat /smack/doi 3 # netlabelctl -p cipso list Configured CIPSO mappings (1) DOI value : 3 mapping type : PASS_THROUGH # netlabelctl -p map list Configured NetLabel domain mappings (3) domain: "_" (IPv4) protocol: UNLABELED domain: DEFAULT (IPv4) protocol: CIPSO, DOI = 3 domain: DEFAULT (IPv6) protocol: UNLABELED # cat /smack/ambient _ # cat /proc/$$/attr/smack/current _ # ping -c1 10.1.95.12 64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.964 ms # echo foo >/proc/$$/attr/smack/current # ping -c1 10.1.95.12 64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.956 ms unknown option 86 # echo 4 >/smack/doi # echo 3 >/smack/doi !> [ 214.050395] smk_cipso_doi:691 cipso add rc = -17 # echo 3 >/smack/doi !> [ 249.402261] smk_cipso_doi:678 remove rc = -2 !> [ 249.402261] smk_cipso_doi:691 cipso add rc = -17 # ping -c1 10.1.95.12 !!> ping: 10.1.95.12: Address family for hostname not supported # echo _ >/proc/$$/attr/smack/current # ping -c1 10.1.95.12 64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.617 ms This happens because Smack keeps decommissioned DOIs, fails to re-add them, and consequently refuses to add the “default” domain map: # netlabelctl -p cipso list Configured CIPSO mappings (2) DOI value : 3 mapping type : PASS_THROUGH DOI value : 4 mapping type : PASS_THROUGH # netlabelctl -p map list Configured NetLabel domain mappings (2) domain: "_" (IPv4) protocol: UNLABELED !> (no ipv4 map for default domain here) domain: DEFAULT (IPv6) protocol: UNLABELED Fix by clearing decommissioned DOI definitions and serializing concurrent DOI updates with a new lock. Also: - allow /smack/doi to live unconfigured, since adding a map (netlbl_cfg_cipsov4_map_add) may fail. CIPSO_V4_DOI_UNKNOWN(0) indicates the unconfigured DOI - add new DOI before removing the old default map, so the old map remains if the add fails (2008-02-04, Casey Schaufler)

Overview

State
PUBLISHED
Assigner (CNA)
Linux
CVSS severity
high
CVSS score
CVSS 8.4 / 10 8.4 8.4 / 10
CVSS vector
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Effective score
8.4 / 10 HIGH source: CNA overview
CWE(s)
—
Reserved
2026-05-08
Published
2026-05-27 12:14 UTC
Last updated
2026-05-27 12:14 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2025/71xxx/CVE-2025-71304.json
Linked Threat
CVE-2025-71304 — CVE-2025-71304

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-05-27 14:16:42 UTC
NVD last modified
2026-06-25 21:04:41 UTC
NVD CVSS v3.1
CVSS 5.5 / 10 5.5 5.5 / 10 MEDIUM source: nvd@nist.gov
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Exploitability subscore
1.8 / 10
Impact subscore
3.6 / 10
EPSS score
0.0016 (probability of exploitation in next 30 days)
EPSS percentile
5.59% vs all CVEs — higher = more likely to be exploited, as of 2026-07-26

NVD / KEV / EPSS data refreshed 2026-07-27 10:43 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2025-209968
Assigner
Linux
Published
May 27, 2026, 12:14:53 PM
Updated
May 27, 2026, 12:14:53 PM
EUVD base score
0.0 / 10
EUVD-reported EPSS
0.1600
Vendors
Linux
Products
Linux (patch: 6.12.75)
Linux (e114e473771c848c3cfec05f0123e70f1cdbdc99 <8beebb8ad9a003f978e53b06237986588223e15e)
Linux (e114e473771c848c3cfec05f0123e70f1cdbdc99 <f8071500177f38cff38892bd85ac631cc6e010b2)
Linux (e114e473771c848c3cfec05f0123e70f1cdbdc99 <5a247a84de0ba44edbbd6be851c8a6b2aa60ff85)
Linux (patch: 6.18.14)
Linux (patch: 6.1.165)
Linux (patch: 5.10.252)
Linux (patch: 5.15.202)
Linux (e114e473771c848c3cfec05f0123e70f1cdbdc99 <1c7ee23dfcd18d80770d8f90f2ab5bb1b2bfd8a3)
Linux (patch: 6.19.4)
Linux (e114e473771c848c3cfec05f0123e70f1cdbdc99 <6ec091c5c7eeabd249a7c46813cad1e9f555f859)
Linux (e114e473771c848c3cfec05f0123e70f1cdbdc99 <33d589ed60ae433b483761987b85e0d24e54584e)
Linux (patch: 7.0)
Linux (patch: 6.6.128)
Linux (e114e473771c848c3cfec05f0123e70f1cdbdc99 <eb718a3c8181ada679340db34cd61bce48e44749)
Linux (patch: 0)
Linux (e114e473771c848c3cfec05f0123e70f1cdbdc99 <199452f22d2f74b897fe826f81ec402b0a8461a0)
Linux (2.6.25)
Aliases
GHSA-hgc7-rqx4-p393

ENISA description: In the Linux kernel, the following vulnerability has been resolved: smack: /smack/doi: accept previously used values Writing to /smack/doi a value that has ever been written there in the past disables networking for non-ambient labels. E.g. # cat /smack/doi 3 # netlabelctl -p cipso list Configured CIPSO mappings (1) DOI value : 3 mapping type : PASS_THROUGH # netlabelctl -p map list Configured NetLabel domain mappings (3) domain: "_" (IPv4) protocol: UNLABELED domain: DEFAULT (IPv4) protocol: CIPSO, DOI = 3 domain: DEFAULT (IPv6) protocol: UNLABELED # cat /smack/ambient _ # cat /proc/$$/attr/smack/current _ # ping -c1 10.1.95.12 64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.964 ms # echo foo >/proc/$$/attr/smack/current # ping -c1 10.1.95.12 64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.956 ms unknown option 86 # echo 4 >/smack/doi # echo 3 >/smack/doi !> [ 214.050395] smk_cipso_doi:691 cipso add rc = -17 # echo 3 >/smack/doi !> [ 249.402261] smk_cipso_doi:678 remove rc = -2 !> [ 249.402261] smk_cipso_doi:691 cipso add rc = -17 # ping -c1 10.1.95.12 !!> ping: 10.1.95.12: Address family for hostname not supported # echo _ >/proc/$$/attr/smack/current # ping -c1 10.1.95.12 64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.617 ms This happens because Smack keeps decommissioned DOIs, fails to re-add them, and consequently refuses to add the “default” domain map: # netlabelctl -p cipso list Configured CIPSO mappings (2) DOI value : 3 mapping type : PASS_THROUGH DOI value : 4 mapping type : PASS_THROUGH # netlabelctl -p map list Configured NetLabel domain mappings (2) domain: "_" (IPv4) protocol: UNLABELED !> (no ipv4 map for default domain here) domain: DEFAULT (IPv6) protocol: UNLABELED Fix by clearing decommissioned DOI definitions and serializing concurrent DOI updates with a new lock. Also: - allow /smack/doi to live unconfigured, since adding a map (netlbl_cfg_cipsov4_map_add) may fail. CIPSO_V4_DOI_UNKNOWN(0) indicates the unconfigured DOI - add new DOI before removing the old default map, so the old map remains if the add fails (2008-02-04, Casey Schaufler)

EUVD references (8)

Affected products (2)
VendorProductVersionsPlatforms
Linux Linux e114e473771c848c3cfec05f0123e70f1cdbdc99 (affected), e114e473771c848c3cfec05f0123e70f1cdbdc99 (affected), e114e473771c848c3cfec05f0123e70f1cdbdc99 (affected), e114e473771c848c3cfec05f0123e70f1cdbdc99 (affected), e114e473771c848c3cfec05f0123e70f1cdbdc99 (affected), e114e473771c848c3cfec05f0123e70f1cdbdc99 (affected), e114e473771c848c3cfec05f0123e70f1cdbdc99 (affected), e114e473771c848c3cfec05f0123e70f1cdbdc99 (affected) —
Linux Linux 2.6.25 (affected), 0 (unaffected), 5.10.252 (unaffected), 5.15.202 (unaffected), 6.1.165 (unaffected), 6.6.128 (unaffected), 6.12.75 (unaffected), 6.18.14 (unaffected), 6.19.4 (unaffected), 7.0 (unaffected) —

Affected products — CPE 2.3 (1) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Vendor references (8)

References embedded in the original CVE record by the assigning CNA.

Web references (11)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

NVD-tagged references (8)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (18)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

  • Mitigate RedSun Zero-Day Without A Patch | Qualys
    web:blog.qualys.com

    Key Takeaways RedSun is a critical zero-day vulnerability in Microsoft Defender that allows low-privileged users to gain SYSTEM access No patch is currently available, leaving all Defender-enabled Windows systems potentially exposed Qualys VMDR detects affected assets instantly (QID 92382) TruRisk™ Eliminate enables immediate mitigation , removing exploitability without waiting for a fix ...

    2026-06-04 00:02 UTC
  • CVE-2026-7304: Lmsys Sglang RCE Bug - What It Means for Your Business ...
    web:integsec.com

    CVE -2026-7304 was published to the National Vulnerability Database on May 18, 2026, with a final NVD update on May 19, 2026. The vulnerability affects LMSYS SGLang version 0.5.10 and any SGLang deployment started with the --enable-custom-logit-processor flag. SGLang is a serving runtime for large language and multimodal models used by enterprises deploying AI inference workloads.

    2026-06-04 00:02 UTC
  • Microsoft Patch Tuesday, September 2025 Edition - Krebs on Security
    web:krebsonsecurity.com

    Microsoft Corp. today issued security updates to fix more than 80 vulnerabilities in its Windows operating systems and software. There are no known "zero-day" or actively exploited vulnerabilities ...

    2026-06-04 00:02 UTC
  • Microsoft Patch Tuesday, December 2025 Edition - Krebs on Security
    web:krebsonsecurity.com

    Microsoft today pushed updates to fix at least 56 security flaws in its Windows operating systems and supported software. This final Patch Tuesday of 2025 tackles one zero-day bug that is already ...

    2026-06-04 00:02 UTC
  • Remediate vulnerabilities with Microsoft Defender Vulnerability ...
    web:learn.microsoft.com

    Remediate security weaknesses discovered through security recommendations, and create exceptions if needed, in Defender Vulnerability Management.

    2026-06-04 00:02 UTC
  • DEBIAN-CVE-2025-71304 | Mondoo Vulnerability Intelligence
    web:mondoo.com

    DEBIAN- CVE - 2025 - 71304 - UNKNOWN severity: (In the Linux kernel, the following vulnerability has been resolved: s ...)

    2026-06-04 00:02 UTC
  • Security Update Guide - Microsoft
    web:portal.msrc.microsoft.com

    The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

    2026-06-04 00:02 UTC
  • Known Exploited Vulnerabilities Catalog - CISA
    web:www.cisa.gov

    For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild. Organizations should use the KEV catalog as an input to their vulnerability management prioritization framework. Learn more about ...

    2026-06-04 00:02 UTC
  • Latest Windows Update Problems and How to Fix Them
    web:www.maketecheasier.com

    Check out the latest Windows 11 and Windows 10 update problems and their solutions, as recommended by Microsoft experts.

    2026-06-04 00:02 UTC
  • Microsoft Defender vulnerabilities are being exploited in the wild
    web:www.malwarebytes.com

    The KEV catalog tracks vulnerabilities known to be exploited in the wild and sets patch deadlines for Federal Civilian Executive Branch (FCEB) agencies. Five of the added vulnerabilities are quite old by vulnerability standards. Patches were released in 2008, 2009, and 2010. But the Microsoft Defender vulnerabilities are from this year. Those ...

    2026-06-04 00:02 UTC
  • Microsoft Patch Tuesday, July 2025 - SANS Internet Storm Center
    web:isc.sans.edu

    Microsoft Patch Tuesday, July 2025 , Author: Johannes Ullrich

    2026-06-19 02:27 UTC
  • UPDATE: Microsoft Releases Guidance on Exploitation of ... - CISA
    web:www.cisa.gov

    Update (08/06/ 2025 ): CISA released a Malware Analysis Report (MAR) on six files related to CVE - 2025 -49704, CVE - 2025 -49706, CVE - 2025 -53770, and CVE - 2025 -53771. For more information see MAR-251132.c1.v1 Exploitation of SharePoint Vulnerabilities and CISA Releases Malware Analysis Report Associated with Microsoft SharePoint Vulnerabilities.

    2026-06-19 02:27 UTC
  • February's Patch Tuesday release fixes 59 flaws ... - Computerworld
    web:www.computerworld.com

    Each month, the team at Readiness analyzes the latest Patch Tuesday updates from Microsoft and provides detailed, actionable testing guidance. The company's Patch Tuesday release for February ...

    2026-06-19 02:27 UTC
  • September 2025 Patch Tuesday: Updates and Analysis | CrowdStrike
    web:www.crowdstrike.com

    Microsoft has released security updates for 84 vulnerabilities, including 2 publicly disclosed zero-day and 8 critical, in its September 2025 Patch Tuesday rollout.

    2026-06-19 02:27 UTC
  • Microsoft Technical Security Notifications
    web:www.microsoft.com

    Security Update Guide Notifications Microsoft's free Security Update Guide Notifications provide links to security-related software updates and notification of re-released security updates. These notifications are sent via email throughout the month as needed.

    2026-06-19 02:27 UTC
  • Patch Tuesday - June 2025 | Rapid7 Blog
    web:www.rapid7.com

    Microsoft is addressing 67 vulnerabilities this June 2025 Patch Tuesday. Learn more about the findings in this Patch Tuesday.

    2026-06-19 02:27 UTC
  • Vulnerabilities Resolved in Veeam Backup & Replication 13.0.1.2067
    web:www.veeam.com

    When a vulnerability is identified, our team promptly develops a patch to address and mitigate the risk. In line with our dedication to transparency, we publicly disclose the vulnerability and provide detailed mitigation information.

    2026-06-19 02:27 UTC
  • Patch Tuesday June 2026: Security Updates & CVE Analysis
    web:zecurit.com

    Get the complete breakdown of Microsoft's June 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

    2026-06-19 02:27 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2025-71304.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "security/smack/smackfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
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            },
            {
              "lessThan": "2.6.25",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.252",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.202",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
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            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
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            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
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            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
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            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmack: /smack/doi: accept previously used values\n\nWriting to /smack/doi a value that has ever been\nwritten there in the past disables networking for\nnon-ambient labels.\nE.g.\n\n    # cat /smack/doi\n    3\n    # netlabelctl -p cipso list\n    Configured CIPSO mappings (1)\n     DOI value : 3\n       mapping type : PASS_THROUGH\n    # netlabelctl -p map list\n    Configured NetLabel domain mappings (3)\n     domain: \"_\" (IPv4)\n       protocol: UNLABELED\n     domain: DEFAULT (IPv4)\n       protocol: CIPSO, DOI = 3\n     domain: DEFAULT (IPv6)\n       protocol: UNLABELED\n\n    # cat /smack/ambient\n    _\n    # cat /proc/$$/attr/smack/current\n    _\n    # ping -c1 10.1.95.12\n    64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.964 ms\n    # echo foo >/proc/$$/attr/smack/current\n    # ping -c1 10.1.95.12\n    64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.956 ms\n    unknown option 86\n\n    # echo 4 >/smack/doi\n    # echo 3 >/smack/doi\n!>  [  214.050395] smk_cipso_doi:691 cipso add rc = -17\n    # echo 3 >/smack/doi\n!>  [  249.402261] smk_cipso_doi:678 remove rc = -2\n!>  [  249.402261] smk_cipso_doi:691 cipso add rc = -17\n\n    # ping -c1 10.1.95.12\n!!> ping: 10.1.95.12: Address family for hostname not supported\n\n    # echo _ >/proc/$$/attr/smack/current\n    # ping -c1 10.1.95.12\n    64 bytes from 10.1.95.12: icmp_seq=1 ttl=64 time=0.617 ms\n\nThis happens because Smack keeps decommissioned DOIs,\nfails to re-add them, and consequently refuses to add\nthe \u201cdefault\u201d domain map:\n\n    # netlabelctl -p cipso list\n    Configured CIPSO mappings (2)\n     DOI value : 3\n       mapping type : PASS_THROUGH\n     DOI value : 4\n       mapping type : PASS_THROUGH\n    # netlabelctl -p map list\n    Configured NetLabel domain mappings (2)\n     domain: \"_\" (IPv4)\n       protocol: UNLABELED\n!>  (no ipv4 map for default domain here)\n     domain: DEFAULT (IPv6)\n       protocol: UNLABELED\n\nFix by clearing decommissioned DOI definitions and\nserializing concurrent DOI updates with a new lock.\n\nAlso:\n- allow /smack/doi to live unconfigured, since\n  adding a map (netlbl_cfg_cipsov4_map_add) may fail.\n  CIPSO_V4_DOI_UNKNOWN(0) indicates the unconfigured DOI\n- add new DOI before removing the old default map,\n  so the old map remains if the add fails\n\n(2008-02-04, Casey Schaufler)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:14:53.289Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/eb718a3c8181ada679340db34cd61bce48e44749"
        },
        {
          "url": "https://git.kernel.org/stable/c/6ec091c5c7eeabd249a7c46813cad1e9f555f859"
        },
        {
          "url": "https://git.kernel.org/stable/c/199452f22d2f74b897fe826f81ec402b0a8461a0"
        },
        {
          "url": "https://git.kernel.org/stable/c/1c7ee23dfcd18d80770d8f90f2ab5bb1b2bfd8a3"
        },
        {
          "url": "https://git.kernel.org/stable/c/f8071500177f38cff38892bd85ac631cc6e010b2"
        },
        {
          "url": "https://git.kernel.org/stable/c/5a247a84de0ba44edbbd6be851c8a6b2aa60ff85"
        },
        {
          "url": "https://git.kernel.org/stable/c/8beebb8ad9a003f978e53b06237986588223e15e"
        },
        {
          "url": "https://git.kernel.org/stable/c/33d589ed60ae433b483761987b85e0d24e54584e"
        }
      ],
      "title": "smack: /smack/doi: accept previously used values",
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      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71304",
    "datePublished": "2026-05-27T12:14:53.289Z",
    "dateReserved": "2026-05-08T13:14:33.087Z",
    "dateUpdated": "2026-05-27T12:14:53.289Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}