Answer in brief
CVE-2026-64096 records a Unknown severity 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.
Answer in brief
CVE-2026-64096 records a Unknown severity 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.
A CVSS score is not reported in the current record. 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.
| 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 5, 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.
A CVSS score is not reported in the current record. 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.
| 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 5, 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.