7.5

CVE-2022-49110: netfilter: conntrack: revisit gc autotuning

Modified
AliasesUBUNTU-CVE-2022-49110DEBIAN-CVE-2022-49110
Published 26-02-2025Last modified 15-10-2026

Vulnerability summary

CVE-2022-49110 is a high (CVSS 7.5) vulnerability in linux. EPSS estimates a 0.61% chance of exploitation in the next 30 days, higher than 49.2% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.61%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 6
SUSE-SU-2025:01620-1SUSE-SU-2025:01640-1SUSE-SU-2025:01918-1SUSE-SU-2025:01982-1SUSE-SU-2025:01995-1SUSE-SU-2025:02262-1

Timeline

  1. 26-02-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.61%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.61% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu103 products
  • linuxAll versions (No fix recorded) | < 5.15.0-37.39
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1011.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 4608fdfc07e116f9fc0895beb40abad7cdb5ee3d, < 58d52743ae85d28c9335c6034d6ce350b8689951 | ≥ 4608fdfc07e116f9fc0895beb40abad7cdb5ee3d, < 7cd361d5e6d986c0d4cafb9ceaa803359048ae15 | ≥ 4608fdfc07e116f9fc0895beb40abad7cdb5ee3d, < 592e57591826f3d09c28d755a39ea8e9d13705ad | ≥ 4608fdfc07e116f9fc0895beb40abad7cdb5ee3d, < 2cfadb761d3d0219412fd8150faea60c7e863833 | dafc95a1e473a0b857af34ecbb17b8b1c90edd75 | 5892f910f401c1facfc410e0b042108f2827a77b | f68ad168e23565ce2a3891fec537cfaf8410d1e6 | 7aa03980b21fdc7355e20274a68a69a0b2a45c08 | ≥ 4.19.206, < 4.20 | ≥ 5.4.144, < 5.5 | ≥ 5.10.62, < 5.11 | ≥ 5.13.14, < 5.14 | 5.14
  • linux_kernel< 5.15.34 | ≥ 5.16, < 5.16.20 | ≥ 5.17, < 5.17.3
Debian1 product
  • linux< 5.17.3-1

3 vendors · 106 products

References

8 links