{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90323","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.802Z","datePublished":"2026-09-17T16:08:39.434Z","dateUpdated":"2026-09-17T16:08:39.434Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-17T16:08:39.434Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nublk: validate auto buf reg before taking uring_cmd\n\nWith UBLK_F_AUTO_BUF_REG, invalid sqe->addr can fail after\nublk_fill_io_cmd() has set UBLK_IO_FLAG_ACTIVE. The uring_cmd is\ncompleted while the tag stays active, which can hang teardown.\n\nSplit validation from buffer apply so the check has no side effects,\nthen take the uring_cmd and store the already-validated buffer. Apply\nthe same order in FETCH so io->buf is not written before __ublk_fetch()\nstate checks."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/ublk_drv.c"],"versions":[{"version":"52460dda3a775a73f226312b43c0a0211e8665ea","lessThan":"653d22269a8b83b491f7f186a5d7872f14e6ddca","status":"affected","versionType":"git"},{"version":"52460dda3a775a73f226312b43c0a0211e8665ea","lessThan":"ca5a01eee34c7cbe0f531a613b0292a3ad1a419b","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/ublk_drv.c"],"versions":[{"version":"6.17","status":"affected"},{"version":"0","lessThan":"6.17","status":"unaffected","versionType":"semver"},{"version":"7.2.6","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/653d22269a8b83b491f7f186a5d7872f14e6ddca"},{"url":"https://git.kernel.org/stable/c/ca5a01eee34c7cbe0f531a613b0292a3ad1a419b"}],"title":"ublk: validate auto buf reg before taking uring_cmd","x_generator":{"engine":"bippy-1.2.0"}}}}