{"id":"CVE-2026-74376","title":"md/raid10: reset read_slot when reusing r10bio for discard","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","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= d30588b2731fb01e1616cf16c3fe79a1443e29aa < 3cb2a606ce4902eceabe68338df0653312f861f8","Linux >= d30588b2731fb01e1616cf16c3fe79a1443e29aa < 561c9711e4f545d6464a023168bdee03b00fa945","Linux >= d30588b2731fb01e1616cf16c3fe79a1443e29aa < ce3030e92f14362880055de5fe3c258971118853","Linux >= d30588b2731fb01e1616cf16c3fe79a1443e29aa < 742e4afd247d9c972695227716b03d432a7e1d26","Linux >= d30588b2731fb01e1616cf16c3fe79a1443e29aa < b7313f23ea5a79b199a007bfad64a866cc2c22e7","Linux >= d30588b2731fb01e1616cf16c3fe79a1443e29aa < eb04e3e9c14ed15914f5fd2eae8b6435f54f095f","Linux >= d30588b2731fb01e1616cf16c3fe79a1443e29aa < 6b8a26af065ddc93de2aa5c9f0df98dce9723442","Linux 5.13"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-16T18:54:45.646885Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T18:55:36.173Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74376","references":[{"url":"https://git.kernel.org/stable/c/3cb2a606ce4902eceabe68338df0653312f861f8"},{"url":"https://git.kernel.org/stable/c/561c9711e4f545d6464a023168bdee03b00fa945"},{"url":"https://git.kernel.org/stable/c/ce3030e92f14362880055de5fe3c258971118853"},{"url":"https://git.kernel.org/stable/c/742e4afd247d9c972695227716b03d432a7e1d26"},{"url":"https://git.kernel.org/stable/c/b7313f23ea5a79b199a007bfad64a866cc2c22e7"},{"url":"https://git.kernel.org/stable/c/eb04e3e9c14ed15914f5fd2eae8b6435f54f095f"},{"url":"https://git.kernel.org/stable/c/6b8a26af065ddc93de2aa5c9f0df98dce9723442"}],"tags":["cve.org"],"epss":0.00738,"epssPercentile":0.53607,"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## Affected\n\n- `Linux >= d30588b2731fb01e1616cf16c3fe79a1443e29aa < 3cb2a606ce4902eceabe68338df0653312f861f8`\n- `Linux >= d30588b2731fb01e1616cf16c3fe79a1443e29aa < 561c9711e4f545d6464a023168bdee03b00fa945`\n- `Linux >= d30588b2731fb01e1616cf16c3fe79a1443e29aa < ce3030e92f14362880055de5fe3c258971118853`\n- `Linux >= d30588b2731fb01e1616cf16c3fe79a1443e29aa < 742e4afd247d9c972695227716b03d432a7e1d26`\n- `Linux >= d30588b2731fb01e1616cf16c3fe79a1443e29aa < b7313f23ea5a79b199a007bfad64a866cc2c22e7`\n- `Linux >= d30588b2731fb01e1616cf16c3fe79a1443e29aa < eb04e3e9c14ed15914f5fd2eae8b6435f54f095f`\n- `Linux >= d30588b2731fb01e1616cf16c3fe79a1443e29aa < 6b8a26af065ddc93de2aa5c9f0df98dce9723442`\n- `Linux 5.13`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}