# CVE-2022-49110: linux: In the Linux kernel, the following vulnerability has been resolved:  netfilter: conntrack: revisit gc autotuning  as...

CVE-2022-49110 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49110, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49110
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0061
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  netfilter: conntrack: revisit gc autotuning  as of commit 4608fdfc07e1 ("netfilter: conntrack: collect all entries in one cycle") conntrack gc was changed to run every 2 minutes.  On systems where conntrack hash table is set to large value, most evictions happen from gc worker rather than the packet path due to hash table distribution.  This causes netlink event overflows when events are collected.  This change collects average expiry of scanned entries and reschedules to the average remaining value, within 1 to 60 second interval.  To avoid event overflows, reschedule after each bucket and add a limit for both run time and number of evictions per run.  If more entries have to be evicted, reschedule and restart 1 jiffy into the future.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.17.3-1 | [DEBIAN-CVE-2022-49110](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49110.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.17.3-1 | [DEBIAN-CVE-2022-49110](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49110.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.17.3-1 | [DEBIAN-CVE-2022-49110](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49110.md) | Feb 26, 2025 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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