CVE-2026-45897
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_counter: serialize reset with spinlock Add a global static spinlock to serialize counter fetch+reset operations, preventing concurrent dump-and-reset from underrunning values. The lock is taken before fetching the total so that two parallel resets cannot both read the same counter values and then both subtract them. A global lock is used for simplicity since resets are infrequent. If this becomes a bottleneck, it can be replaced with a per-net lock later.
Affected versions
Linux kernel versions
6.1.107,
6.6.48,
6.7
and later are affected. Fixed in
6.19.4,
7.0
and their respective stable series.
References
The following references provide additional information about CVE-2026-45897 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/0cdc6d5a26f2d1f7f15a43526841b679445c32e2
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PatchKernel patch commithttps://git.kernel.org/stable/c/779c60a5190c42689534172f4b49e927c9959e4e
Frequently asked questions
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What is CVE-2026-45897?
CVE-2026-45897 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.1.107 onward and has been patched in 6.19.4 and 7.0. CVE-2026-45897 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-2026-45897?
Yes — CVE-2026-45897 has been patched. Fixed versions include 6.19.4 and 7.0. If you are running Linux kernel 6.1.107 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-45897 actively exploited?
No — CVE-2026-45897 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.