CVE-2026-45250
📛 CVE Title
Stack buffer overflow via setcred(2)
Description
The setcred(2) system call is only available to privileged users. However, before the privilege level of the caller is checked, the user-supplied list of supplementary groups is copied into a fixed-size kernel stack buffer without first validating its length. If the supplied list exceeds the capacity of that buffer, a stack buffer overflow occurs. Because the bounds check on the supplementary groups list occurs after the kernel stack buffer has already been written, an unprivileged local user may trigger the overflow without holding any special privilege. Successful exploitation may allow an attacker to execute arbitrary code in the context of the kernel, allowing an unprivileged local user to gain elevated privileges on the affected system.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- freebsd
- CVSS severity
- high
- CVSS score
- 7.8 / 10
- CVSS vector
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Effective score
- 7.8 / 10 HIGH source: CNA overview
- CWE(s)
-
CWE-121 - Reserved
- 2026-05-11
- Published
- 2026-05-21 08:37 UTC
- Last updated
- 2026-05-21 08:37 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/45xxx/CVE-2026-45250.json
- Linked Threat
- CVE-2026-45250 — CVE-2026-45250
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
- 2026-05-21 09:16:30 UTC
- NVD last modified
- 2026-05-22 08:16:14 UTC
- NVD CVSS v3.1
- 7.8 / 10 HIGH source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
- NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Exploitability subscore
- 1.8 / 10
- Impact subscore
- 5.9 / 10
- EPSS score
- 0.0001 (probability of exploitation in next 30 days)
- EPSS percentile
- 0.29% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD / KEV / EPSS data refreshed 2026-05-25 00:28 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-2026-31252 - Assigner
- freebsd
- Published
- May 21, 2026, 8:37:17 AM
- Updated
- May 22, 2026, 7:11:47 AM
- EUVD base score (CVSS 3.1)
-
7.8 / 10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EUVD-reported EPSS
- 0.0100
- Vendors
- FreeBSD
- Products
-
FreeBSD (14.4-RELEASE <p5)FreeBSD (14.3-RELEASE <p14)FreeBSD (15.0-RELEASE <p9)
- Aliases
-
GHSA-qr94-c32q-xh3q
ENISA description: The setcred(2) system call is only available to privileged users. However, before the privilege level of the caller is checked, the user-supplied list of supplementary groups is copied into a fixed-size kernel stack buffer without first validating its length. If the supplied list exceeds the capacity of that buffer, a stack buffer overflow occurs. Because the bounds check on the supplementary groups list occurs after the kernel stack buffer has already been written, an unprivileged local user may trigger the overflow without holding any special privilege. Successful exploitation may allow an attacker to execute arbitrary code in the context of the kernel, allowing an unprivileged local user to gain elevated privileges on the affected system.
EUVD references (1)
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| FreeBSD | FreeBSD |
15.0-RELEASE (affected),
14.4-RELEASE (affected),
14.3-RELEASE (affected)
|
— |
Affected products — CPE 2.3 (29) 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:freebsd:freebsd:14.3:-:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.3:p1:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.3:p10:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.3:p11:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.3:p12:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.3:p13:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.3:p2:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.3:p3:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.3:p4:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.3:p5:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.3:p6:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.3:p7:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.3:p8:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.3:p9:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.4:-:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.4:p1:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.4:p2:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.4:p3:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.4:p4:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:14.4:rc1:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:15.0:-:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:15.0:p1:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:15.0:p2:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:15.0:p3:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:15.0:p4:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:15.0:p5:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:15.0:p6:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:15.0:p7:*:*:*:*:*:*cpe:2.3:o:freebsd:freebsd:15.0:p8:*:*:*:*:*:*
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
Web references (9)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://attackerkb.com/topics/CVE-2026-45250 rapid7:attackerkb.com
- https://nvd.nist.gov/vuln/detail/CVE-2026-45250 tenable:nvd.nist.gov
- https://security.freebsd.org/advisories/FreeBSD-SA-26:18.setcred.asc tenable:security.freebsd.org
- https://www.cve.org/CVERecord?id=CVE-2026-45250 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
- https://www.freebsd.org/security/advisories/FreeBSD-SA-26:18.setcred.asc tenable:www.freebsd.org
- http://www.openwall.com/lists/oss-security/2026/05/21/18 tenable:www.openwall.com
- http://www.openwall.com/lists/oss-security/2026/05/21/3 tenable:www.openwall.com
- http://www.openwall.com/lists/oss-security/2026/05/22/5 tenable:www.openwall.com
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.
- https://security.freebsd.org/advisories/FreeBSD-SA-26:18.setcred.asc secteam@freebsd.org Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/05/21/18 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/05/21/3 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/05/22/5 af854a3a-2127-422b-91ae-364da2661108
Remediations (16)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:blog.qualys.com
With Qualys Policy Audit's out-of-the-box mitigation or Compensatory Controls, which reduce the risk of a vulnerability being exploited because the remediation ( fix / patch ) cannot be done immediately, these security controls are not recommended by any industry standards, such as CIS and DISA-STIG.
2026-05-23 22:20 UTC -
web:cyberpress.org
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two actively exploited Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, issuing an urgent remediation directive for federal agencies with a due date of June 3, 2026 .
2026-05-23 22:20 UTC -
web:cybersecuritynews.com
Microsoft released its March 2026 Patch Tuesday security update on March 10, 2026 , addressing 78 vulnerabilities across Windows, Microsoft Office, Azure, SQL Server, and .NET. The update includes one actively exploited zero-day vulnerability and multiple Critical-rated flaws demanding immediate attention from security teams. The most urgent fix this month is CVE - 2026 -21262, the sole zero-day ...
2026-05-23 22:20 UTC -
web:krebsonsecurity.com
Microsoft expects that exploitation is more likely. May's Patch Tuesday is a welcome respite from April, which saw Microsoft fix a near-record 167 security flaws.
2026-05-23 22:20 UTC -
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.
2026-05-23 22:20 UTC -
web:www.crowdstrike.com
Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.
2026-05-23 22:20 UTC -
web:www.dbtsupport.com
The May 2026 Microsoft Patch Tuesday release includes security updates across supported Microsoft products and should be reviewed directly in the Microsoft Security Update Guide for the final CVE list, affected products, severity ratings, exploitability assessments, and any revised guidance.
2026-05-23 22:20 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-05-23 22:20 UTC -
web:www.windowslatest.com
Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.
2026-05-23 22:20 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-05-23 22:20 UTC -
web:blog.qualys.com
Oracle released its second quarterly edition of this year's Critical Patch Update. The update received patches for 481 security vulnerabilities.
2026-05-26 02:59 UTC -
web:krebsonsecurity.com
For a clickable, per- patch breakdown, check out the SANS Internet Storm Center Patch Tuesday roundup. Running into problems applying any of these updates?
2026-05-26 02:59 UTC -
web:msrc.microsoft.com
The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.
2026-05-26 02:59 UTC -
web:support.servicenow.com
Overview The advisories below document publicly disclosed Common Vulnerabilities and Exposures ( CVEs ) in the Now Platform by ServiceNow. Because ServiceNow uses various methods to communicate vulnerability information, patches, and other fixes, customers should review family, security patch , and hotfix release notes, which are available at https://docs.servicenow.com, for a complete list of ...
2026-05-26 02:59 UTC -
web:www.bleepingcomputer.com
Today is Microsoft's April 2026 Patch Tuesday with security updates for 167 flaws, including 2 zero-day vulnerabilities.
2026-05-26 02:59 UTC -
web:www.cisecurity.org
<p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...
2026-05-26 02:59 UTC
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-45250.json.
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"modules": [
"setcred"
],
"product": "FreeBSD",
"vendor": "FreeBSD",
"versions": [
{
"lessThan": "p9",
"status": "affected",
"version": "15.0-RELEASE",
"versionType": "release"
},
{
"lessThan": "p5",
"status": "affected",
"version": "14.4-RELEASE",
"versionType": "release"
},
{
"lessThan": "p14",
"status": "affected",
"version": "14.3-RELEASE",
"versionType": "release"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Ryan of Calif.io"
},
{
"lang": "en",
"type": "finder",
"value": "Przemyslaw Frasunek"
}
],
"datePublic": "2026-05-20T23:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "The setcred(2) system call is only available to privileged users. However, before the privilege level of the caller is checked, the user-supplied list of supplementary groups is copied into a fixed-size kernel stack buffer without first validating its length. If the supplied list exceeds the capacity of that buffer, a stack buffer overflow occurs.\n\nBecause the bounds check on the supplementary groups list occurs after the kernel stack buffer has already been written, an unprivileged local user may trigger the overflow without holding any special privilege. Successful exploitation may allow an attacker to execute arbitrary code in the context of the kernel, allowing an unprivileged local user to gain elevated privileges on the affected system."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-121",
"description": "CWE-121: Stack-based Buffer Overflow",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-21T08:37:17.553Z",
"orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
"shortName": "freebsd"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:18.setcred.asc"
}
],
"title": "Stack buffer overflow via setcred(2)",
"x_generator": {
"engine": "cvelib 1.8.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
"assignerShortName": "freebsd",
"cveId": "CVE-2026-45250",
"datePublished": "2026-05-21T08:37:17.553Z",
"dateReserved": "2026-05-11T16:27:44.891Z",
"dateUpdated": "2026-05-21T08:37:17.553Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}