Answer in brief
CVE-2026-45897 records a Medium severity (CVSS 5.5) vulnerability in netfilter: nft_counter: serialize reset with spinlock. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=3cb03edb4de33fd04c4ea55f47397b96a8657c53 <48cf7918d10c66cb6b05226fa3fa5daf0c891089 || >=3cb03edb4de33fd04c4ea55f47397b96a8657c53 <cd968dcdec6aee79a2d399e4f6e0eca63c3b45e1 || >=3cb03edb4de33fd04c4ea55f47397b96a8657c53 <0cdc6d5a26f2d1f7f15a43526841b679445c32e2 || >=3cb03edb4de33fd04c4ea55f47397b96a8657c53 <779c60a5190c42689534172f4b49e927c9959e4e || fb1adb05ea87b6149e65a31e511756c4f470d0cd || f123293db16dcd0cd81b246ae60e6362f0025d0a || >=6.1.107 <6.2 || >=6.6.48 <6.7 | 48cf7918d10c66cb6b05226fa3fa5daf0c891089, cd968dcdec6aee79a2d399e4f6e0eca63c3b45e1, 0cdc6d5a26f2d1f7f15a43526841b679445c32e2, 779c60a5190c42689534172f4b49e927c9959e4e, 6.2, 6.7 |
| Linux/Linuxgeneric | 6.7 | Not reported |
Published upstream
May 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-45897 records a Medium severity (CVSS 5.5) vulnerability in netfilter: nft_counter: serialize reset with spinlock. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=3cb03edb4de33fd04c4ea55f47397b96a8657c53 <48cf7918d10c66cb6b05226fa3fa5daf0c891089 || >=3cb03edb4de33fd04c4ea55f47397b96a8657c53 <cd968dcdec6aee79a2d399e4f6e0eca63c3b45e1 || >=3cb03edb4de33fd04c4ea55f47397b96a8657c53 <0cdc6d5a26f2d1f7f15a43526841b679445c32e2 || >=3cb03edb4de33fd04c4ea55f47397b96a8657c53 <779c60a5190c42689534172f4b49e927c9959e4e || fb1adb05ea87b6149e65a31e511756c4f470d0cd || f123293db16dcd0cd81b246ae60e6362f0025d0a || >=6.1.107 <6.2 || >=6.6.48 <6.7 | 48cf7918d10c66cb6b05226fa3fa5daf0c891089, cd968dcdec6aee79a2d399e4f6e0eca63c3b45e1, 0cdc6d5a26f2d1f7f15a43526841b679445c32e2, 779c60a5190c42689534172f4b49e927c9959e4e, 6.2, 6.7 |
| Linux/Linuxgeneric | 6.7 | Not reported |
Published upstream
May 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
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.
Quoted source text, attributed separately from HOL analysis.