CVE-2026-90323ublk: validate auto buf reg before taking uring_cmd
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: ublk: validate auto buf reg before taking uring_cmd With UBLK_F_AUTO_BUF_REG, invalid sqe->addr can fail after ublk_fill_io_cmd() has set UBLK_IO_FLAG_ACTIVE. The uring_cmd is completed while the tag stays active, which can hang teardown. Split validation from buffer apply so the check has no side effects, then take the uring_cmd and store the already-validated buffer. Apply the same order in FETCH so io->buf is not written before __ublk_fetch() state checks.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 52460dda3a775a73f226312b43c0a0211e8665ea before 8397942b67128e0b1275cfedb5abf4faafac5fd0; 52460dda3a775a73f226312b43c0a0211e8665ea builds before 653d22269a8b83b491f7f186a5d7872f14e6ddca; from 52460dda3a775a73f226312b43c0a0211e8665ea before ca5a01eee34c7cbe0f531a613b0292a3ad1a419b | CNA record |
References
- https://git.kernel.org/stable/c/8397942b67128e0b1275cfedb5abf4faafac5fd0
- https://git.kernel.org/stable/c/653d22269a8b83b491f7f186a5d7872f14e6ddca
- https://git.kernel.org/stable/c/ca5a01eee34c7cbe0f531a613b0292a3ad1a419b
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.