CVE-2026-31431Linux Kernel Incorrect Resource Transfer Between Spheres Vulnerability

BOD 26-04 remediation window

With CISA's SSVC answers for this CVE (automatable: no, technical impact: total), BOD 26-04 Table 1 gives 3 days and forensic triage on a publicly exposed asset (row 3) and 14 days on an asset that is not publicly exposed (row 11) ^S06. The catalogue due date, 14 days after the date added, was set before BOD 26-04 took effect on 10 June 2026 ^S06. The directive binds US federal civilian executive branch agencies only.

What CISA says

Short description

Linux Kernel contains an incorrect resource transfer between spheres vulnerability that could allow for privilege escalation.

Required action

"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Notes

https://lore.kernel.org/linux-cve-announce/2026042214-CVE-2026-31431-3d65@gregkh/; https://xint.io/blog/copy-fail-linux-distributions#the-fix-6 ; https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/about/ ; https://nvd.nist.gov/vuln/detail/CVE-2026-31431

CWE in the catalogue

CWE-669

Official links

• CISA KEV catalogue entry cisa.gov
• NVD record nvd.nist.gov

Vendor advisory and patch links

References NVD tags Vendor Advisory or Patch, exactly as NVD lists them.

• https://git.kernel.org/stable/c/19d43105a97be0810edbda875f2cd03f30dc130c Patch
• https://git.kernel.org/stable/c/3115af9644c342b356f3f07a4dd1c8905cd9a6fc Patch
• https://git.kernel.org/stable/c/893d22e0135fa394db81df88697fba6032747667 Patch
• https://git.kernel.org/stable/c/8b88d99341f139e23bdeb1027a2a3ae10d341d82 Patch
• https://git.kernel.org/stable/c/961cfa271a918ad4ae452420e7c303149002875b Patch
• https://git.kernel.org/stable/c/a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5 Patch
• https://git.kernel.org/stable/c/ce42ee423e58dffa5ec03524054c9d8bfd4f6237 Patch
• https://git.kernel.org/stable/c/fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8 Patch
• http://www.openwall.com/lists/oss-security/2026/04/29/23 Exploit, Mailing List, Patch
• http://www.openwall.com/lists/oss-security/2026/04/29/25 Mailing List, Patch
• http://www.openwall.com/lists/oss-security/2026/04/29/26 Exploit, Mailing List, Patch
• http://www.openwall.com/lists/oss-security/2026/04/30/10 Mailing List, Patch
• http://www.openwall.com/lists/oss-security/2026/04/30/11 Mailing List, Patch
• http://www.openwall.com/lists/oss-security/2026/04/30/12 Mailing List, Patch
• http://www.openwall.com/lists/oss-security/2026/04/30/14 Mailing List, Patch
• http://www.openwall.com/lists/oss-security/2026/04/30/15 Mailing List, Patch
• http://www.openwall.com/lists/oss-security/2026/04/30/16 Mailing List, Patch
• http://www.openwall.com/lists/oss-security/2026/04/30/5 Exploit, Mailing List, Patch
• https://lore.kernel.org/linux-cve-announce/2026042214-CVE-2026-31431-3d65@gregkh/ Vendor Advisory
• https://xint.io/blog/copy-fail-linux-distributions#the-fix-6 Exploit, Patch, Third Party Advisory

Links in CISA's notes

• https://lore.kernel.org/linux-cve-announce/2026042214-CVE-2026-31431-3d65@gregkh/
• https://xint.io/blog/copy-fail-linux-distributions#the-fix-6
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/about/
• https://nvd.nist.gov/vuln/detail/CVE-2026-31431

NVD details

CWE (NVD)

CWE-669 by CISA ADP, CWE-1288 by 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS versions in NVD

V31

Last modified in NVD

2026-09-08T15:13:07.273

Where each value comes from

This product uses data from the NVD API but is not endorsed or certified by the NVD. CISA does not endorse Sysprobs. Methodology.