{"id":"CVE-2026-74376","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-74376","summary":"md/raid10: reset read_slot when reusing r10bio for discard","details":"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 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.","published":"2026-08-15T05:58:55.023Z","modified":"2026-08-18T03:56:46.970522506Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"5.15.212"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3cb2a606ce4902eceabe68338df0653312f861f8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/561c9711e4f545d6464a023168bdee03b00fa945"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6b8a26af065ddc93de2aa5c9f0df98dce9723442"},{"type":"WEB","url":"https://git.kernel.org/stable/c/742e4afd247d9c972695227716b03d432a7e1d26"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b7313f23ea5a79b199a007bfad64a866cc2c22e7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ce3030e92f14362880055de5fe3c258971118853"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eb04e3e9c14ed15914f5fd2eae8b6435f54f095f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74376.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74376"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T03:56:46.970522506Z"}}