ACPI: APEI: send SIGBUS to current task if synchronous memory error not recovered

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-39763
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-09-11 17:15:40 UTC
Updated2026-11-05 22:17:30 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ACPI: APEI: send SIGBUS to current task if synchronous memory error not recovered If a synchronous error is detected as a result of user-space process triggering a 2-bit uncorrected error, the CPU will take a synchronous error exception such as Synchronous External Abort (SEA) on Arm64. The kernel will queue a memory_failure() work which poisons the related page, unmaps the page, and then sends a SIGBUS to the process, so that a system wide panic can be avoided. However, no memory_failure() work will be queued when abnormal synchronous errors occur. These errors can include situations like invalid PA, unexpected severity, no memory failure config support, invalid GUID section, etc. In such a case, the user-space process will trigger SEA again. This loop can potentially exceed the platform firmware threshold or even trigger a kernel hard lockup, leading to a system reboot. Fix it by performing a force kill if no memory_failure() work is queued for synchronous errors. [ rjw: Changelog edits ]

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 8fcc4ae6faf8b455eeef00bc9ae70744e3b0f462 2fbc85da9ac9386bd89fcc94e0aadaea19d47784 git Not specified
CNA Linux Linux affected 8fcc4ae6faf8b455eeef00bc9ae70744e3b0f462 082735fbcdb6cd0cf20fbec94516ab2996f1cdd5 git Not specified
CNA Linux Linux affected 8fcc4ae6faf8b455eeef00bc9ae70744e3b0f462 cfc9bc15bda6fd0c496cbe2c628564d4d7c332c1 git Not specified
CNA Linux Linux affected 8fcc4ae6faf8b455eeef00bc9ae70744e3b0f462 af089e41811a1ad6a7b2b80e839a73ec4c3cecdd git Not specified
CNA Linux Linux affected 8fcc4ae6faf8b455eeef00bc9ae70744e3b0f462 3cb4f18797247985b0f51d5300f8cb6c78f343ea git Not specified
CNA Linux Linux affected 8fcc4ae6faf8b455eeef00bc9ae70744e3b0f462 79a5ae3c4c5eb7e38e0ebe4d6bf602d296080060 git Not specified
CNA Linux Linux affected af02933d59bd1621a48d8b0b331cca9e530ba14b git Not specified
CNA Linux Linux affected 5.4.69 5.5 semver Not specified
CNA Linux Linux affected 5.8 Not specified
CNA Linux Linux unaffected 5.8 semver Not specified
CNA Linux Linux unaffected 6.1.164 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.103 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.43 6.12.* semver Not specified
CNA Linux Linux unaffected 6.15.11 6.15.* semver Not specified
CNA Linux Linux unaffected 6.16.2 6.16.* semver Not specified
CNA Linux Linux unaffected 6.17 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/082735fbcdb6cd0cf20fbec94516ab2996f1cdd5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/cfc9bc15bda6fd0c496cbe2c628564d4d7c332c1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2fbc85da9ac9386bd89fcc94e0aadaea19d47784 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/79a5ae3c4c5eb7e38e0ebe4d6bf602d296080060 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3cb4f18797247985b0f51d5300f8cb6c78f343ea 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/af089e41811a1ad6a7b2b80e839a73ec4c3cecdd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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