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CVE-2026-45893

📛 CVE Title

apparmor: Fix & Optimize table creation from possibly unaligned memory

⬇ Download JSON ⚠ View as Threat

Description

In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix & Optimize table creation from possibly unaligned memory Source blob may come from userspace and might be unaligned. Try to optize the copying process by avoiding unaligned memory accesses. - Added Fixes tag - Added "Fix &" to description as this doesn't just optimize but fixes a potential unaligned memory access [jj: remove duplicate word "convert" in comment trigger checkpatch warning]

Overview

State
PUBLISHED
Assigner (CNA)
Linux
CVSS severity
high
CVSS score
CVSS 7.1 / 10 7.1 7.1 / 10
CVSS vector
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Effective score
7.1 / 10 HIGH source: CNA overview
MSRC score
3.3 / 10 LOW MS rating: Low
CWE(s)
CWE-125
Reserved
2026-05-13
Published
2026-05-27 12:17 UTC
Last updated
2026-05-27 12:17 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/45xxx/CVE-2026-45893.json
Linked Threat
CVE-2026-45893 — CVE-2026-45893

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 14:17:03 UTC
NVD last modified
2026-06-25 21:10:15 UTC
NVD CVSS v3.1
CVSS 7.1 / 10 7.1 7.1 / 10 HIGH source: nvd@nist.gov
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Exploitability subscore
1.8 / 10
Impact subscore
5.2 / 10
EPSS score
0.0013 (probability of exploitation in next 30 days)
EPSS percentile
2.61% vs all CVEs — higher = more likely to be exploited, as of 2026-07-26

NVD / KEV / EPSS data refreshed 2026-07-27 11:52 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-2026-32359
Assigner
Linux
Published
May 27, 2026, 12:17:04 PM
Updated
May 27, 2026, 12:17:04 PM
EUVD base score
0.0 / 10
EUVD-reported EPSS
0.1300
Vendors
Linux
Products
Linux (patch: 6.19.4)
Linux (patch: 7.0)
Linux (patch: 6.12.75)
Linux (4.11)
Linux (patch: 0)
Linux (e6e8bf418850d7958311a96ccfb594f2bcc8313e <226c3b10aab23f73b03c47e7773107de56ba3a4e)
Linux (e6e8bf418850d7958311a96ccfb594f2bcc8313e <e027999049c493fb728ead5a90db76942181a935)
Linux (patch: 6.18.14)
Linux (e6e8bf418850d7958311a96ccfb594f2bcc8313e <47e351dfef60ab0e3285133556e1a9c7f646a969)
Linux (e6e8bf418850d7958311a96ccfb594f2bcc8313e <6fc367bfd4c8886e6b1742aabbd1c0bdc310db3a)
Aliases
GHSA-44ww-rw32-794r

ENISA description: In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix & Optimize table creation from possibly unaligned memory Source blob may come from userspace and might be unaligned. Try to optize the copying process by avoiding unaligned memory accesses. - Added Fixes tag - Added "Fix &" to description as this doesn't just optimize but fixes a potential unaligned memory access [jj: remove duplicate word "convert" in comment trigger checkpatch warning]

EUVD references (4)

Microsoft Security Response Center MSRC

Microsoft's vendor-authoritative record from the Security Update Guide — its own CVSS score, impact, severity rating, exploit assessment, and KB-article fixes. Refreshed 2026-08-12 01:09 UTC (source: CVRF).

MS severity
Low
MS CVSS base score
3.3 / 10 (temporal 3.1)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U
Release
2026-May

Affected products (2)
VendorProductVersionsPlatforms
Linux Linux e6e8bf418850d7958311a96ccfb594f2bcc8313e (affected), e6e8bf418850d7958311a96ccfb594f2bcc8313e (affected), e6e8bf418850d7958311a96ccfb594f2bcc8313e (affected), e6e8bf418850d7958311a96ccfb594f2bcc8313e (affected) —
Linux Linux 4.11 (affected), 0 (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 (4)

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

Web references (8)

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 (4)

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 (17)

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

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-45893.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "security/apparmor/include/match.h",
            "security/apparmor/match.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "47e351dfef60ab0e3285133556e1a9c7f646a969",
              "status": "affected",
              "version": "e6e8bf418850d7958311a96ccfb594f2bcc8313e",
              "versionType": "git"
            },
            {
              "lessThan": "e027999049c493fb728ead5a90db76942181a935",
              "status": "affected",
              "version": "e6e8bf418850d7958311a96ccfb594f2bcc8313e",
              "versionType": "git"
            },
            {
              "lessThan": "226c3b10aab23f73b03c47e7773107de56ba3a4e",
              "status": "affected",
              "version": "e6e8bf418850d7958311a96ccfb594f2bcc8313e",
              "versionType": "git"
            },
            {
              "lessThan": "6fc367bfd4c8886e6b1742aabbd1c0bdc310db3a",
              "status": "affected",
              "version": "e6e8bf418850d7958311a96ccfb594f2bcc8313e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "security/apparmor/include/match.h",
            "security/apparmor/match.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.11"
            },
            {
              "lessThan": "4.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.14",
              "versionType": "semver"
            },
            {
              "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": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.75",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.14",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.4",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: Fix & Optimize table creation from possibly unaligned memory\n\nSource blob may come from userspace and might be unaligned.\nTry to optize the copying process by avoiding unaligned memory accesses.\n\n- Added Fixes tag\n- Added \"Fix &\" to description as this doesn't just optimize but fixes\n        a potential unaligned memory access\n[jj: remove duplicate word \"convert\" in comment trigger checkpatch warning]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:17:04.135Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/47e351dfef60ab0e3285133556e1a9c7f646a969"
        },
        {
          "url": "https://git.kernel.org/stable/c/e027999049c493fb728ead5a90db76942181a935"
        },
        {
          "url": "https://git.kernel.org/stable/c/226c3b10aab23f73b03c47e7773107de56ba3a4e"
        },
        {
          "url": "https://git.kernel.org/stable/c/6fc367bfd4c8886e6b1742aabbd1c0bdc310db3a"
        }
      ],
      "title": "apparmor: Fix & Optimize table creation from possibly unaligned memory",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45893",
    "datePublished": "2026-05-27T12:17:04.135Z",
    "dateReserved": "2026-05-13T15:03:33.083Z",
    "dateUpdated": "2026-05-27T12:17:04.135Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}