Answer in brief
CVE-2025-39763 records a Medium severity (CVSS 5.5) vulnerability in ACPI: APEI: send SIGBUS to current task if synchronous memory error not recovered. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=8fcc4ae6faf8b455eeef00bc9ae70744e3b0f462 <2fbc85da9ac9386bd89fcc94e0aadaea19d47784 || >=8fcc4ae6faf8b455eeef00bc9ae70744e3b0f462 <082735fbcdb6cd0cf20fbec94516ab2996f1cdd5 || >=8fcc4ae6faf8b455eeef00bc9ae70744e3b0f462 <cfc9bc15bda6fd0c496cbe2c628564d4d7c332c1 || >=8fcc4ae6faf8b455eeef00bc9ae70744e3b0f462 <af089e41811a1ad6a7b2b80e839a73ec4c3cecdd || >=8fcc4ae6faf8b455eeef00bc9ae70744e3b0f462 <3cb4f18797247985b0f51d5300f8cb6c78f343ea || >=8fcc4ae6faf8b455eeef00bc9ae70744e3b0f462 <79a5ae3c4c5eb7e38e0ebe4d6bf602d296080060 || af02933d59bd1621a48d8b0b331cca9e530ba14b || >=5.4.69 <5.5 | 2fbc85da9ac9386bd89fcc94e0aadaea19d47784, 082735fbcdb6cd0cf20fbec94516ab2996f1cdd5, cfc9bc15bda6fd0c496cbe2c628564d4d7c332c1, af089e41811a1ad6a7b2b80e839a73ec4c3cecdd, 3cb4f18797247985b0f51d5300f8cb6c78f343ea, 79a5ae3c4c5eb7e38e0ebe4d6bf602d296080060, 5.5 |
| Linux/Linuxgeneric | 5.8 | Not reported |
Published upstream
Sep 11, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 28, 2026
In 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 ]
Quoted source text, attributed separately from HOL analysis.