{"id":"CVE-2025-39763","summary":"ACPI: APEI: send SIGBUS to current task if synchronous memory error not recovered","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: APEI: send SIGBUS to current task if synchronous memory error not recovered\n\nIf a synchronous error is detected as a result of user-space process\ntriggering a 2-bit uncorrected error, the CPU will take a synchronous\nerror exception such as Synchronous External Abort (SEA) on Arm64. The\nkernel will queue a memory_failure() work which poisons the related\npage, unmaps the page, and then sends a SIGBUS to the process, so that\na system wide panic can be avoided.\n\nHowever, no memory_failure() work will be queued when abnormal\nsynchronous errors occur. These errors can include situations like\ninvalid PA, unexpected severity, no memory failure config support,\ninvalid GUID section, etc. In such a case, the user-space process will\ntrigger SEA again.  This loop can potentially exceed the platform\nfirmware threshold or even trigger a kernel hard lockup, leading to a\nsystem reboot.\n\nFix it by performing a force kill if no memory_failure() work is queued\nfor synchronous errors.\n\n[ rjw: Changelog edits ]","modified":"2026-04-02T12:48:08.604903Z","published":"2025-09-11T16:52:31.350Z","related":["SUSE-SU-2025:03600-1","SUSE-SU-2025:03614-1","SUSE-SU-2025:03634-1","SUSE-SU-2025:20851-1","SUSE-SU-2025:20861-1","SUSE-SU-2025:20870-1","SUSE-SU-2025:20898-1","SUSE-SU-2025:21074-1","SUSE-SU-2025:21139-1","SUSE-SU-2025:21179-1","SUSE-SU-2025:3751-1","SUSE-SU-2025:4057-1","SUSE-SU-2025:4132-1","SUSE-SU-2025:4141-1","openSUSE-SU-2025:20081-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39763.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/082735fbcdb6cd0cf20fbec94516ab2996f1cdd5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2fbc85da9ac9386bd89fcc94e0aadaea19d47784"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3cb4f18797247985b0f51d5300f8cb6c78f343ea"},{"type":"WEB","url":"https://git.kernel.org/stable/c/79a5ae3c4c5eb7e38e0ebe4d6bf602d296080060"},{"type":"WEB","url":"https://git.kernel.org/stable/c/af089e41811a1ad6a7b2b80e839a73ec4c3cecdd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cfc9bc15bda6fd0c496cbe2c628564d4d7c332c1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39763.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-39763"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"8fcc4ae6faf8b455eeef00bc9ae70744e3b0f462"},{"fixed":"2fbc85da9ac9386bd89fcc94e0aadaea19d47784"},{"fixed":"082735fbcdb6cd0cf20fbec94516ab2996f1cdd5"},{"fixed":"cfc9bc15bda6fd0c496cbe2c628564d4d7c332c1"},{"fixed":"af089e41811a1ad6a7b2b80e839a73ec4c3cecdd"},{"fixed":"3cb4f18797247985b0f51d5300f8cb6c78f343ea"},{"fixed":"79a5ae3c4c5eb7e38e0ebe4d6bf602d296080060"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"af02933d59bd1621a48d8b0b331cca9e530ba14b"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39763.json"}}],"schema_version":"1.7.5"}