CVE-2026-68097 Affecting linux-6.12 package, versions <6.12.101-1~deb12u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published18 Aug 2026
- disclosed10 Aug 2026
Introduced: 10 Aug 2026
CVE-2026-68097 (opens in a new tab)How to fix?
Upgrade Echo:latest linux-6.12 to version 6.12.101-1~deb12u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-6.12 package and not the linux-6.12 package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: validate ACE size against SID sub-authorities
set_ntacl_dacl() validates sid.num_subauth before copying an ACE, but does not verify that the declared ACE size contains all sub-authorities described by that field. An undersized ACE can therefore be copied and later make the POSIX ACL deduplication walk inspect data beyond the copied ACE boundary.
The existing initial bound check is also too small. It only ensures that the ACE size field is accessible before set_ntacl_dacl() reads sid.num_subauth farther into the input buffer.
Require enough input for the fixed SID header before accessing num_subauth, reject ACEs smaller than that header, and skip ACEs whose declared size cannot contain the complete SID. This makes the validation consistent with the other ACE walk paths.
References
- https://advisory.echohq.com/cve/CVE-2026-68097
- https://git.kernel.org/stable/c/337022d9dfac441c3b35e4455a51aa981996e02e
- https://git.kernel.org/stable/c/5152c6d49e3fd4e9f2e857c57527aead752f1f87
- https://git.kernel.org/stable/c/61fd3559199f7fa693dcbff35e59477e24af041a
- https://git.kernel.org/stable/c/62d80d7c2d9428085e7458ad4c06ca8c0984039b
- https://git.kernel.org/stable/c/b7cb5bf0855470799f12da825de91e48951b3876