7.8

CVE-2022-49622: netfilter: nf_tables: avoid skb access on nf_stolen

Modified
AliasesUBUNTU-CVE-2022-49622DEBIAN-CVE-2022-49622
Published 26-02-2025Last modified 30-10-2026

Vulnerability summary

CVE-2022-49622 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 19.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.27%
0%100%
Low · +0.02 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 1 · Related 1
SUSE-SU-2025:02334-1

Timeline

  1. 26-02-2025
    PublishedVulnerability first disclosed.
  2. 30-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: avoid skb access on nf_stolen When verdict is NF_STOLEN, the skb might have been freed. When tracing is enabled, this can result in a use-after-free: 1. access to skb->nf_trace 2. access to skb->mark 3. computation of trace id 4. dump of packet payload To avoid 1, keep a cached copy of skb->nf_trace in the trace state struct. Refresh this copy whenever verdict is != STOLEN. Avoid 2 by skipping skb->mark access if verdict is STOLEN. 3 is avoided by precomputing the trace id. Only dump the packet when verdict is not "STOLEN".

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

Increase +0.02 pp

From 0.26% 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

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu116 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02, < 348218a4601e93de4d1e9fab29837cf656e4bf99 | ≥ 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02, < 453a67af8bd77463b33cb0336dd7f2341e332d29 | ≥ 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02, < 0016d5d46d7440729a3132f61a8da3bf7f84e2ba | ≥ 5efa0fc6d7f7930b18801f07cefae8eeacd6ac02, < e34b9ed96ce3b06c79bf884009b16961ca478f87 | 4.10
  • linux_kernel< 5.18.13 | 5.19:rc1 | 5.19:rc2 | 5.19:rc3 | 5.19:rc4
Debian1 product
  • linux< 5.18.14-1

3 vendors · 119 products

References

8 links