TI-2022-24625 Aliases CVE-2022-49110 GHSA-pv5x-cgg5-p627

netfilter: conntrack: revisit gc autotuning

MEDIUM 40Published 2025-02-26 · Updated 2026-10-15

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · None · High
Fix status: Partial Red Hat: 4 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00611 49th percentileScored 2026-11-07

Fix Partial Linux (Linux): 4.20, 5.5, 5.11 +5Red Hat: 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	4.19.206 to before 4.20; 5.4.144 to before 5.5; 5.10.62 to before 5.11; 5.13.14 to before 5.14	4.20, 5.5, 5.11, 5.14	Patch available	CNA
Linux	Linux	5.14 and later	5.15.34, 5.16.20, 5.17.3, 5.18	Patch available	CNA

Linux VendorLinux Affected 4.19.206 to before 4.20; 5.4.144 to before 5.5; 5.10.62 to before 5.11; 5.13.14 to before 5.14 Fixed in 4.20, 5.5, 5.11, 5.14 Patch available CNA
Linux VendorLinux Affected 5.14 and later Fixed in 5.15.34, 5.16.20, 5.17.3, 5.18 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	before 5.15.34; 5.16 to before 5.16.20; 5.17 to before 5.17.3	Vulnerable	Linux

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 5.15.34; 5.16 to before 5.16.20; 5.17 to before 5.17.3 Vulnerable ·Linux

Remediation

Fix · CNA Linux (Linux) Fixed in 4.20, 5.5, 5.11, 5.14
Fix · CNA Linux (Linux) Fixed in 5.15.34, 5.16.20, 5.17.3, 5.18

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 7	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 8	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 9	Affected	No fix yet

Not affected: 1 product

Red Hat Enterprise Linux 10

Timeline

2026-10-02 Threatist record created from CVE-2022-49110
2026-10-03 Alias added: GHSA-pv5x-cgg5-p627
2026-10-16 CISA SSVC decision points changed
2026-10-16 Priority changed: LOW → MEDIUM

References

Patch 4

TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3

See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences