8.8

CVE-2026-64096: linux Use After Free

CVSS: 8.8v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-64096DEBIAN-CVE-2026-64096
Published 19-07-2026Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2026-64096 is a high (CVSS 8.8) Use After Free vulnerability in linux. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 16% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.26%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 32 · Related 32
USN-8575-1USN-8575-2USN-8575-3USN-8576-1USN-8576-2USN-8593-1

Timeline

  1. 19-07-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: mcast: fix use-after-free in orig_node RCU release batadv_mcast_purge_orig() removes entries from RCU-protected hlists but does not wait for an RCU grace period before returning. Concurrent RCU readers may still accesses references to those entries at the point of removal. RCU-protected readers trying to operate on entries like orig->mcast_want_all_ipv6_node will then access already freed memory. Fix this by moving batadv_mcast_purge_orig() to batadv_orig_node_release(), just before the call_rcu() invocation. This ensures RCU readers that were active at purge time have drained before the orig_node memory is reclaimed.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.26%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

0.00 pp

From 0.26% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.26%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu167 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-139.139 | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1064.67 | < 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ ab49886e3da73b6b35ece21006e191910427bb30, < ff3a4487ead475e27b43280b8ee3d8464fe280e1 | ≥ ab49886e3da73b6b35ece21006e191910427bb30, < 78a63fb2f7d5630d1c1f2859a20d4e4226863b41 | ≥ ab49886e3da73b6b35ece21006e191910427bb30, < ced48f55bac73f0822eae90509e51b42b4f646c8 | ≥ ab49886e3da73b6b35ece21006e191910427bb30, < 70bcb678561f0fb58f33270fc73f12f3be72b878 | ≥ ab49886e3da73b6b35ece21006e191910427bb30, < aef897c9d2dd0d9339167fb82b62beff68d076cb | ≥ ab49886e3da73b6b35ece21006e191910427bb30, < 8a3707653ab658e082ccd992e92594e01b09a3fc | ≥ ab49886e3da73b6b35ece21006e191910427bb30, < edfb1e094104a50f931553dc82ac59246569fd32 | ≥ ab49886e3da73b6b35ece21006e191910427bb30, < 20c2d6a20ca936f5aaa6dd40f73f262ac45c87cc | 3.15
  • linux_kernel≥ 3.15, < 5.10.258 | ≥ 5.11, < 5.15.209 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.142 | ≥ 6.7, < 6.12.92 | ≥ 6.13, < 6.18.34 | ≥ 6.19, < 7.0.11 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4
Debian1 product
  • linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.12-1

3 vendors · 170 products

References

44 links
Show all 44 references