CVE-2026-45897 Details
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.
A vulnerability in the Linux kernel's netfilter component, specifically within the nft_counter functionality, has been addressed. This issue involved the lack of proper synchronization during counter reset operations, which could lead to inaccurate counter values. The vulnerability was present in the Linux kernel stable tree. The root cause was the absence of a mechanism to serialize counter fetch and reset operations, allowing concurrent processes to interfere with each other's data. Exploitation could occur during simultaneous dump-and-reset operations, where two parallel resets might read the same counter values and incorrectly adjust them.
Users can upgrade to the latest version of the Linux kernel stable tree to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.1.107, < 6.2 >= 6.6.48, < 6.19.4 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 14, 2026 | CVE Modified | kernel.org |
| Aug 3, 2026 | CVE Modified | kernel.org |
| Jun 25, 2026 | Initial Analysis | [email protected] |
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 27, 2026 | New CVE Received | kernel.org |