7.8

CVE-2026-23412: netfilter: bpf: defer hook memory release until rcu readers are done

Modified
AliasesUBUNTU-CVE-2026-23412DEBIAN-CVE-2026-23412
Published 02-04-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-23412 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 4.9% 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
0.16%
0%100%
Low · +0.04 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 18 · Related 18
SUSE-SU-2026:21114-1SUSE-SU-2026:21123-1SUSE-SU-2026:21255-1SUSE-SU-2026:2238-1USN-8567-1USN-8574-1

Timeline

  1. 02-04-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: bpf: defer hook memory release until rcu readers are done Yiming Qian reports UaF when concurrent process is dumping hooks via nfnetlink_hooks: BUG: KASAN: slab-use-after-free in nfnl_hook_dump_one.isra.0+0xe71/0x10f0 Read of size 8 at addr ffff888003edbf88 by task poc/79 Call Trace: <TASK> nfnl_hook_dump_one.isra.0+0xe71/0x10f0 netlink_dump+0x554/0x12b0 nfnl_hook_get+0x176/0x230 [..] Defer release until after concurrent readers have completed.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

Increase +0.04 pp

From 0.12% 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.

Ubuntu130 products
  • linux< 6.8.0-136.136 | All versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1061.64 | All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 84601d6ee68ae820dec97450934797046d62db4b, < d016c216bc75c45128160593a77b864a04dbe7c0 | ≥ 84601d6ee68ae820dec97450934797046d62db4b, < cb2bf5efdb02a2a59faf603604a1066e8266f349 | ≥ 84601d6ee68ae820dec97450934797046d62db4b, < c25e0dec366ae99b7264324ce3c7cbaea34691f9 | ≥ 84601d6ee68ae820dec97450934797046d62db4b, < 54244d54a971c26a0cd0a9073460ff71f3c51b32 | ≥ 84601d6ee68ae820dec97450934797046d62db4b, < 24f90fa3994b992d1a09003a3db2599330a5232a | 6.4
  • linux_kernelEOL≥ 6.4.1, < 6.6.130 | ≥ 6.7, < 6.12.78 | ≥ 6.13, < 6.18.20 | ≥ 6.19, < 6.19.10 | 6.4 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6 | 7.0:rc7
Debian1 product
  • linux< 6.12.85-1 | < 6.19.10-1

3 vendors · 133 products

References

23 links
Show all 23 references