Answer in brief
CVE-2026-52912 records a High severity (CVSS 7.8) vulnerability in netfilter: nf_queue: hold bridge skb->dev while queued. 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-2026-52912 records a High severity (CVSS 7.8) vulnerability in netfilter: nf_queue: hold bridge skb->dev while queued. 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 7.8. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ac28634456867b23b95faccba7997a62ec430603 <950d809f154dca04e5fbe5d3c8b9c5e44769cd57 || >=ac28634456867b23b95faccba7997a62ec430603 <a698ac8ab2561cf575d2d9f34095032651dd952e || >=ac28634456867b23b95faccba7997a62ec430603 <19924bdd8a45ebc72a7b84c57fd63057d1dc75ac || >=ac28634456867b23b95faccba7997a62ec430603 <1e5e20031c5eee8d2e490a90ff4d6a2feecfc3be || >=ac28634456867b23b95faccba7997a62ec430603 <3823c27099cfe2482299065814adbaa771be9644 || >=ac28634456867b23b95faccba7997a62ec430603 <15d464265120ab9818bd673af301deee09bedab2 || >=ac28634456867b23b95faccba7997a62ec430603 <3fb0f5c0f64162a8c3f25616a4f1e340b921737f || >=ac28634456867b23b95faccba7997a62ec430603 <e196115ec330a18de415bdb9f5071aa9f08e53ce | 950d809f154dca04e5fbe5d3c8b9c5e44769cd57, a698ac8ab2561cf575d2d9f34095032651dd952e, 19924bdd8a45ebc72a7b84c57fd63057d1dc75ac, 1e5e20031c5eee8d2e490a90ff4d6a2feecfc3be, 3823c27099cfe2482299065814adbaa771be9644, 15d464265120ab9818bd673af301deee09bedab2, 3fb0f5c0f64162a8c3f25616a4f1e340b921737f, e196115ec330a18de415bdb9f5071aa9f08e53ce |
| Linux/Linuxgeneric | 4.7 | Not reported |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_queue: hold bridge skb->dev while queued br_pass_frame_up() rewrites skb->dev from the ingress port to the bridge master before queueing bridge LOCAL_IN packets. NFQUEUE only holds references on state.in/out and bridge physdevs, so a queued bridge packet can retain a freed bridge master in skb->dev until reinjection. When the verdict is reinjected later, br_netif_receive_skb() re-enters the receive path with skb->dev still pointing at the freed bridge master, triggering a use-after-free. Store skb->dev in the queue entry, hold a reference on it for the queue lifetime, and use the saved device when dropping queued packets during NETDEV_DOWN handling.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.8. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ac28634456867b23b95faccba7997a62ec430603 <950d809f154dca04e5fbe5d3c8b9c5e44769cd57 || >=ac28634456867b23b95faccba7997a62ec430603 <a698ac8ab2561cf575d2d9f34095032651dd952e || >=ac28634456867b23b95faccba7997a62ec430603 <19924bdd8a45ebc72a7b84c57fd63057d1dc75ac || >=ac28634456867b23b95faccba7997a62ec430603 <1e5e20031c5eee8d2e490a90ff4d6a2feecfc3be || >=ac28634456867b23b95faccba7997a62ec430603 <3823c27099cfe2482299065814adbaa771be9644 || >=ac28634456867b23b95faccba7997a62ec430603 <15d464265120ab9818bd673af301deee09bedab2 || >=ac28634456867b23b95faccba7997a62ec430603 <3fb0f5c0f64162a8c3f25616a4f1e340b921737f || >=ac28634456867b23b95faccba7997a62ec430603 <e196115ec330a18de415bdb9f5071aa9f08e53ce | 950d809f154dca04e5fbe5d3c8b9c5e44769cd57, a698ac8ab2561cf575d2d9f34095032651dd952e, 19924bdd8a45ebc72a7b84c57fd63057d1dc75ac, 1e5e20031c5eee8d2e490a90ff4d6a2feecfc3be, 3823c27099cfe2482299065814adbaa771be9644, 15d464265120ab9818bd673af301deee09bedab2, 3fb0f5c0f64162a8c3f25616a4f1e340b921737f, e196115ec330a18de415bdb9f5071aa9f08e53ce |
| Linux/Linuxgeneric | 4.7 | Not reported |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_queue: hold bridge skb->dev while queued br_pass_frame_up() rewrites skb->dev from the ingress port to the bridge master before queueing bridge LOCAL_IN packets. NFQUEUE only holds references on state.in/out and bridge physdevs, so a queued bridge packet can retain a freed bridge master in skb->dev until reinjection. When the verdict is reinjected later, br_netif_receive_skb() re-enters the receive path with skb->dev still pointing at the freed bridge master, triggering a use-after-free. Store skb->dev in the queue entry, hold a reference on it for the queue lifetime, and use the saved device when dropping queued packets during NETDEV_DOWN handling.
Quoted source text, attributed separately from HOL analysis.