CVE-2026-45948
In the Linux kernel, the following vulnerability has been resolved: ext4: fix memory leak in ext4_ext_shift_extents() In ext4_ext_shift_extents(), if the extent is NULL in the while loop, the function returns immediately without releasing the path obtained via ext4_find_extent(), leading to a memory leak. Fix this by jumping to the out label to ensure the path is properly released.
Affected versions
Linux kernel versions
3.15
and later are affected. Fixed in
5.10.252,
5.15.202,
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-2026-45948 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/12615ab4bfb69678e5d961b28bb70040299e51b1
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PatchKernel patch commithttps://git.kernel.org/stable/c/1bce219ee5512cf179ba40cf114945a14a16e21f
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PatchKernel patch commithttps://git.kernel.org/stable/c/2f4b1052246ca646bb17bfe0f53df2fdf9729b58
Frequently asked questions
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What is CVE-2026-45948?
CVE-2026-45948 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.15 onward and has been patched in 5.10.252, 5.15.202, 6.1.165 and others. CVE-2026-45948 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-2026-45948?
Yes — CVE-2026-45948 has been patched. Fixed versions include 5.10.252, 5.15.202, 6.1.165 and others. If you are running Linux kernel 3.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-45948 actively exploited?
No — CVE-2026-45948 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.