CVE-2026-45962
In the Linux kernel, the following vulnerability has been resolved: ublk: Validate SQE128 flag before accessing the cmd ublk_ctrl_cmd_dump() accesses (header *)sqe->cmd before IO_URING_F_SQE128 flag check. This could cause out of boundary memory access. Move the SQE128 flag check earlier in ublk_ctrl_uring_cmd() to return -EINVAL immediately if the flag is not set.
Affected versions
Linux kernel versions
6.0
and later are affected. Fixed in
6.1.165,
6.6.128,
6.12.75,
6.18.14,
6.19.4,
7.0
and their respective stable series.
References
The following references provide additional information about CVE-2026-45962 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/17d33ba7291100008360b5a354962db37ad80684
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PatchKernel patch commithttps://git.kernel.org/stable/c/31cac6acf77ece488f29fb8f79589d9298e969c8
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PatchKernel patch commithttps://git.kernel.org/stable/c/4b4dff498f46e9802f71bc84258bf73065f51c6a
Frequently asked questions
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What is CVE-2026-45962?
CVE-2026-45962 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.0 onward and has been patched in 6.1.165, 6.6.128, 6.12.75 and others. CVE-2026-45962 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-45962?
Yes — CVE-2026-45962 has been patched. Fixed versions include 6.1.165, 6.6.128, 6.12.75 and others. If you are running Linux kernel 6.0 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-45962 actively exploited?
No — CVE-2026-45962 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.