Answer in brief
CVE-2026-64096 records a High severity (CVSS 8.8) vulnerability in batman-adv: mcast: fix use-after-free in orig_node RCU release. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ab49886e3da73b6b35ece21006e191910427bb30 <ff3a4487ead475e27b43280b8ee3d8464fe280e1 || >=ab49886e3da73b6b35ece21006e191910427bb30 <78a63fb2f7d5630d1c1f2859a20d4e4226863b41 || >=ab49886e3da73b6b35ece21006e191910427bb30 <ced48f55bac73f0822eae90509e51b42b4f646c8 || >=ab49886e3da73b6b35ece21006e191910427bb30 <70bcb678561f0fb58f33270fc73f12f3be72b878 || >=ab49886e3da73b6b35ece21006e191910427bb30 <aef897c9d2dd0d9339167fb82b62beff68d076cb || >=ab49886e3da73b6b35ece21006e191910427bb30 <8a3707653ab658e082ccd992e92594e01b09a3fc || >=ab49886e3da73b6b35ece21006e191910427bb30 <edfb1e094104a50f931553dc82ac59246569fd32 || >=ab49886e3da73b6b35ece21006e191910427bb30 <20c2d6a20ca936f5aaa6dd40f73f262ac45c87cc | ff3a4487ead475e27b43280b8ee3d8464fe280e1, 78a63fb2f7d5630d1c1f2859a20d4e4226863b41, ced48f55bac73f0822eae90509e51b42b4f646c8, 70bcb678561f0fb58f33270fc73f12f3be72b878, aef897c9d2dd0d9339167fb82b62beff68d076cb, 8a3707653ab658e082ccd992e92594e01b09a3fc, edfb1e094104a50f931553dc82ac59246569fd32, 20c2d6a20ca936f5aaa6dd40f73f262ac45c87cc |
| Linux/Linuxgeneric | 3.15 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.