{"id":"CVE-2026-74373","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid1,raid10: fix bio accounting for split md cloned bios\n\nUse md_cloned_bio() to control bio accounting instead of relying\non r1bio_existed in raid1 or the io_accou…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid1,raid10: fix bio accounting for split md cloned bios\n\nUse md_cloned_bio() to control bio accounting instead of relying\non r1bio_existed in raid1 or the io_accou…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= bb2a9acefaf9ce5bbc1e70f407e34599233d0243 < bcf30e14d2bd509c57e93021b46aedc878896e7b","Linux >= bb2a9acefaf9ce5bbc1e70f407e34599233d0243 < bb8d7ea74206b419aa05d7773a15a923b668c9f0","Linux >= bb2a9acefaf9ce5bbc1e70f407e34599233d0243 < ba976e3501111d11c550848b3b7341a73035f582","Linux 6.6"],"published":"2026-08-15","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:17:45.947","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74373","references":[{"url":"https://git.kernel.org/stable/c/ba976e3501111d11c550848b3b7341a73035f582","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bb8d7ea74206b419aa05d7773a15a923b668c9f0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bcf30e14d2bd509c57e93021b46aedc878896e7b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74373.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-74373"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2516772"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74373"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74373"},{"url":"https://lore.kernel.org/linux-cve-announce/2026081503-CVE-2026-74373-9244@gregkh/T"},{"url":"https://git.kernel.org/stable/c/91d0fc000d8cc40fcb4285e6160dd1ce98c56201"},{"url":"https://git.kernel.org/stable/c/235d16ae715104b981a4fbc9434398e3816773b1"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00209,"epssPercentile":0.10927,"ingestedAt":"2026-10-15T11:00:41.675Z","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-911"],"slug":"CVE-2026-74373","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid1,raid10: fix bio accounting for split md cloned bios\n\nUse md_cloned_bio() to control bio accounting instead of relying\non r1bio_existed in raid1 or the io_accounting flag in raid10.\n\nThe previous logic does not reliably reflect whether a bio is an\nmd cloned bio. When a failed bio is split and resubmitted via\nbio_submit_split_bioset() on the error path, this can lead to either\ndouble accounting for md cloned bios, or missing accounting for bios\nreturned from bio_submit_split_bioset()\n\nFix this by using md_cloned_bio() to detect md cloned bios and\nskip accounting accordingly.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74373.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":223576,"id":"CVE-2026-74373","ts":1792238319578,"field":"cvss","old":null,"new":"5.5"},{"seq":223575,"id":"CVE-2026-74373","ts":1792238319578,"field":"severity","old":"none","new":"medium"}]}