CVE-2026-90323
- Source
- https://cve.org/CVERecord?id=CVE-2026-90323
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90323.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-90323
- Downstream
- Published
- 2026-09-17T16:08:39Z
- Modified
- 2026-09-19T03:47:28Z
- Summary
- ublk: validate auto buf reg before taking uring_cmd
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90323.json" }- References
-
- https://git.kernel.org/stable/c/653d22269a8b83b491f7f186a5d7872f14e6ddca
- https://git.kernel.org/stable/c/ca5a01eee34c7cbe0f531a613b0292a3ad1a419b
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90323.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-90323
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git