Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-64096

Severity CVSS v4.0:
Pending analysis
Type:
CWE-416 Use After Free
Publication date:
19/07/2026
Last modified:
11/08/2026

Description

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

Impact

Vector 3.x
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.80 HIGH
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
8.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 3.15 (including) 5.10.258 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11 (including) 5.15.209 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.16 (including) 6.1.175 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.2 (including) 6.6.142 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.7 (including) 6.12.92 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.13 (including) 6.18.34 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 7.0.11 (excluding)
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools