CVE-2025-40103 The advisory has been revoked - it doesn't affect any version of package kernel-headers (opens in a new tab)
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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Test your applications- Snyk IDSNYK-RHEL10-KERNELHEADERS-13785033
- published31 Oct 2025
- disclosed30 Oct 2025
Introduced: 30 Oct 2025
CVE-2025-40103 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-headers package and not the kernel-headers package as distributed by RHEL.
In the Linux kernel, the following vulnerability has been resolved:
smb: client: Fix refcount leak for cifs_sb_tlink
Fix three refcount inconsistency issues related to cifs_sb_tlink.
Comments for cifs_sb_tlink state that cifs_put_tlink() needs to be
called after successful calls to cifs_sb_tlink(). Three calls fail to
update refcount accordingly, leading to possible resource leaks.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2407350
- https://access.redhat.com/security/cve/CVE-2025-40103
- https://git.kernel.org/stable/c/790282abe9d805f08618c1c24ea2529e7259b692
- https://git.kernel.org/stable/c/896bb31e1416f582503db1350cf1bd10dc64e5a6
- https://git.kernel.org/stable/c/c2b77f42205ef485a647f62082c442c1cd69d3fc
- https://git.kernel.org/stable/c/d7dd034c14928306db1b46be277ae439b84dacf9
- https://git.kernel.org/stable/c/e15605b68b490186da2ad8029c0351a9cfb0b9af
- https://git.kernel.org/stable/c/d3c8ea197055c260119a13360e8202a27e53e1e4