CVE-2026-64096batman-adv: mcast: fix use-after-free in orig_node RCU release
- 8.8HighCVSS base score
- 0.26%Exploitation in 30 daysEPSS · top 83% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
Published
- 17 days later
· 17 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.26% · top 83% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected ab49886e3da73b6b35ece21006e191910427bb30 – < ff3a4487ead475e27b43280b8ee3d8464fe280e1
- affected ab49886e3da73b6b35ece21006e191910427bb30 – < 78a63fb2f7d5630d1c1f2859a20d4e4226863b41
- affected ab49886e3da73b6b35ece21006e191910427bb30 – < ced48f55bac73f0822eae90509e51b42b4f646c8
- affected ab49886e3da73b6b35ece21006e191910427bb30 – < 70bcb678561f0fb58f33270fc73f12f3be72b878
- affected ab49886e3da73b6b35ece21006e191910427bb30 – < aef897c9d2dd0d9339167fb82b62beff68d076cb
- affected ab49886e3da73b6b35ece21006e191910427bb30 – < 8a3707653ab658e082ccd992e92594e01b09a3fc
- affected ab49886e3da73b6b35ece21006e191910427bb30 – < edfb1e094104a50f931553dc82ac59246569fd32
- affected ab49886e3da73b6b35ece21006e191910427bb30 – < 20c2d6a20ca936f5aaa6dd40f73f262ac45c87cc
- affected 3.15
- unaffected < 3.15
- unaffected 5.10.258 – ≤ 5.10.*
- unaffected 5.15.209 – ≤ 5.15.*
- unaffected 6.1.175 – ≤ 6.1.*
- unaffected 6.6.142 – ≤ 6.6.*
- unaffected 6.12.92 – ≤ 6.12.*
- unaffected 6.18.34 – ≤ 6.18.*
- unaffected 7.0.11 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References8
- https://git.kernel.org/stable/c/ff3a4487ead475e27b43280b8ee3d8464fe280e1 (opens in a new tab)
- https://git.kernel.org/stable/c/78a63fb2f7d5630d1c1f2859a20d4e4226863b41 (opens in a new tab)
- https://git.kernel.org/stable/c/ced48f55bac73f0822eae90509e51b42b4f646c8 (opens in a new tab)
- https://git.kernel.org/stable/c/70bcb678561f0fb58f33270fc73f12f3be72b878 (opens in a new tab)
- https://git.kernel.org/stable/c/aef897c9d2dd0d9339167fb82b62beff68d076cb (opens in a new tab)
- https://git.kernel.org/stable/c/8a3707653ab658e082ccd992e92594e01b09a3fc (opens in a new tab)
- https://git.kernel.org/stable/c/edfb1e094104a50f931553dc82ac59246569fd32 (opens in a new tab)
- https://git.kernel.org/stable/c/20c2d6a20ca936f5aaa6dd40f73f262ac45c87cc (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-45781 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64096)Record last updated .