cbcvebase.
CVE-2026-64096
published 2026-07-19

CVE-2026-64096: 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()…

PriorityP347high8.8CVSS 3.1
AVAACLPRNUINSUCHIHAH
EPSS
0.40%
32.4th percentile
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.

Affected

65 ranges· showing 25
VendorProductVersion rangeFixed in
linuxlinux——
linuxlinux>= ab49886e3da73b6b35ece21006e191910427bb30 < ff3a4487ead475e27b43280b8ee3d8464fe280e1ff3a4487ead475e27b43280b8ee3d8464fe280e1
linuxlinux>= ab49886e3da73b6b35ece21006e191910427bb30 < 78a63fb2f7d5630d1c1f2859a20d4e4226863b4178a63fb2f7d5630d1c1f2859a20d4e4226863b41
linuxlinux>= ab49886e3da73b6b35ece21006e191910427bb30 < ced48f55bac73f0822eae90509e51b42b4f646c8ced48f55bac73f0822eae90509e51b42b4f646c8
linuxlinux>= ab49886e3da73b6b35ece21006e191910427bb30 < 70bcb678561f0fb58f33270fc73f12f3be72b87870bcb678561f0fb58f33270fc73f12f3be72b878
linuxlinux>= ab49886e3da73b6b35ece21006e191910427bb30 < aef897c9d2dd0d9339167fb82b62beff68d076cbaef897c9d2dd0d9339167fb82b62beff68d076cb
linuxlinux>= ab49886e3da73b6b35ece21006e191910427bb30 < 8a3707653ab658e082ccd992e92594e01b09a3fc8a3707653ab658e082ccd992e92594e01b09a3fc
linuxlinux>= ab49886e3da73b6b35ece21006e191910427bb30 < edfb1e094104a50f931553dc82ac59246569fd32edfb1e094104a50f931553dc82ac59246569fd32
linuxlinux>= ab49886e3da73b6b35ece21006e191910427bb30 < 20c2d6a20ca936f5aaa6dd40f73f262ac45c87cc20c2d6a20ca936f5aaa6dd40f73f262ac45c87cc
linuxlinux_kernel——
linuxlinux_kernel——
linuxlinux_kernel——
linuxlinux_kernel——
linuxlinux_kernel>= 3.15 < 5.10.2585.10.258
linuxlinux_kernel>= 5.11 < 5.15.2095.15.209
linuxlinux_kernel>= 5.16 < 6.1.1756.1.175
linuxlinux_kernel>= 6.13 < 6.18.346.18.34
linuxlinux_kernel>= 6.19 < 7.0.117.0.11
linuxlinux_kernel>= 6.2 < 6.6.1426.6.142
linuxlinux_kernel>= 6.7 < 6.12.926.12.92
ubuntulinux——
ubuntulinux-aws——
ubuntulinux-aws-5.15——
ubuntulinux-aws-6.8——
ubuntulinux-aws-fips——

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_ubuntu9.1CRITICAL
vendor_redhat8.8HIGH
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