{"id":"CVE-2026-74376","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid10: reset read_slot when reusing r10bio for discard\n\nput_all_bios() always drops devs[i].bio, but it only drops\ndevs[i].repl_bio when r10_bio->read_slot < 0","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid10: reset read_slot when reusing r10bio for discard\n\nput_all_bios() always drops devs[i].bio, but it only drops\ndevs[i].repl_bio when r10_bio->read_slot < 0. If …","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-772"],"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 8","enterprise_linux 9"],"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:17:42.533","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74376","references":[{"url":"https://git.kernel.org/stable/c/3cb2a606ce4902eceabe68338df0653312f861f8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/561c9711e4f545d6464a023168bdee03b00fa945","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6b8a26af065ddc93de2aa5c9f0df98dce9723442","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/742e4afd247d9c972695227716b03d432a7e1d26","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b7313f23ea5a79b199a007bfad64a866cc2c22e7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ce3030e92f14362880055de5fe3c258971118853","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/eb04e3e9c14ed15914f5fd2eae8b6435f54f095f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74376.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-74376"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2516853"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74376"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74376"},{"url":"https://lore.kernel.org/linux-cve-announce/2026081504-CVE-2026-74376-e253@gregkh/T"}],"tags":["nvd","csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00502,"epssPercentile":0.42785,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-16T18:54:45.646885Z"},"scores":{"nvd":9.8,"vendor":5.5,"cna":9.8},"ingestedAt":"2026-10-16T19:46:24.372Z","slug":"CVE-2026-74376","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid10: reset read_slot when reusing r10bio for discard\n\nput_all_bios() always drops devs[i].bio, but it only drops\ndevs[i].repl_bio when r10_bio->read_slot < 0. If discard reuses an\nr10bio that was previously used for a read, read_slot can still be\nnon-negative, and discard cleanup can skip bio_put() on repl_bio.\n\nReset read_slot to -1 when preparing an r10bio for discard so the\nreplacement bio is always released correctly.\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-2026-74376.json)","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":230343,"id":"CVE-2026-74376","ts":1793130919271,"field":"cvss","old":"5.5","new":"9.8"},{"seq":230342,"id":"CVE-2026-74376","ts":1793130919271,"field":"severity","old":"medium","new":"critical"},{"seq":223578,"id":"CVE-2026-74376","ts":1792238319991,"field":"cvss","old":"9.8","new":"5.5"},{"seq":223577,"id":"CVE-2026-74376","ts":1792238319991,"field":"severity","old":"critical","new":"medium"}]}