# CVE-2026-45897

## Summary

- **CVE ID:** CVE-2026-45897
- **Severity:** MEDIUM
- **CVSS Score:** 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** N/A
- **Published:** May 27, 2026
- **Last Modified:** Sep 14, 2026

## Description

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 Products

- Linux — Linux (3cb03edb4de33fd04c4ea55f47397b96a8657c53)
- Linux — Linux (fb1adb05ea87b6149e65a31e511756c4f470d0cd)
- Linux — Linux (f123293db16dcd0cd81b246ae60e6362f0025d0a)
- Linux — Linux (6.1.107)
- Linux — Linux (6.6.48)
- Linux — Linux (6.7)
- Linux — Linux (0)
- Linux — Linux (6.19.4)
- Linux — Linux (7.0)
- Linux — Linux (6.12.101)
- Linux — Linux (6.18.42)
- Linux — Linux (6.1.188)
- Linux — Linux (6.6.157)

## References

- [CNA](https://git.kernel.org/stable/c/0cdc6d5a26f2d1f7f15a43526841b679445c32e2)
- [CNA](https://git.kernel.org/stable/c/779c60a5190c42689534172f4b49e927c9959e4e)
- [CNA](https://git.kernel.org/stable/c/48cf7918d10c66cb6b05226fa3fa5daf0c891089)
- [CNA](https://git.kernel.org/stable/c/cd968dcdec6aee79a2d399e4f6e0eca63c3b45e1)
- [CNA](https://git.kernel.org/stable/c/e13194e60217db02c2e7202375d9e5951267d87b)
- [CNA](https://git.kernel.org/stable/c/de6601f1374fab124cd9276df6671f64d940ceb4)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.16%
- **EPSS Percentile:** 5.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._