8.8

CVE-2026-64096

batman-adv: mcast: fix use-after-free in orig_node RCU release

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.15 < 5.10.258
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.209
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.175
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.142
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.92
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.34
Linux ≫ Linux Kernel Version >= 6.19 < 7.0.11
Linux ≫ Linux Kernel Version7.1 Updaterc1
Linux ≫ Linux Kernel Version7.1 Updaterc2
Linux ≫ Linux Kernel Version7.1 Updaterc3
Linux ≫ Linux Kernel Version7.1 Updaterc4
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.26% 0.171
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 8.8 2.8 5.9
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/ff3a4487ead475e27b43280b8ee3d8464fe280e1
Patch
https://git.kernel.org/stable/c/78a63fb2f7d5630d1c1f2859a20d4e4226863b41
Patch
https://git.kernel.org/stable/c/ced48f55bac73f0822eae90509e51b42b4f646c8
Patch
https://git.kernel.org/stable/c/70bcb678561f0fb58f33270fc73f12f3be72b878
Patch
https://git.kernel.org/stable/c/aef897c9d2dd0d9339167fb82b62beff68d076cb
Patch
https://git.kernel.org/stable/c/8a3707653ab658e082ccd992e92594e01b09a3fc
Patch
https://git.kernel.org/stable/c/edfb1e094104a50f931553dc82ac59246569fd32
Patch
https://git.kernel.org/stable/c/20c2d6a20ca936f5aaa6dd40f73f262ac45c87cc
Patch