Local kernel compromise via hidden SOCKMAP references
Published Jun 24, 2026 · Updated Jun 24, 2026
Use-after-free in AF_UNIX SOCKMAP in Linux Kernel allows local users to read or alter kernel memory or crash the system. sk_psock_verdict_data_ready() redirects an skb carrying SCM_RIGHTS into psock->ingress_skb, which AF_UNIX garbage collection cannot inspect, so a socket still referenced by unix_edge.successor can be freed. Triggering requires local permission to create and attach SK_SKB SOCKMAP BPF objects, such as CAP_BPF, CAP_NET_ADMIN, or delegated BPF-token access.
Summary
What happened
Use-after-free in AF_UNIX SOCKMAP in Linux Kernel allows local users to read or alter kernel memory or crash the system. sk_psock_verdict_data_ready() redirects an skb carrying SCM_RIGHTS into psock->ingress_skb, which AF_UNIX garbage collection cannot inspect, so a socket still referenced by unix_edge.successor can be freed. Triggering requires local permission to create and attach SK_SKB SOCKMAP BPF objects, such as CAP_BPF, CAP_NET_ADMIN, or delegated BPF-token access.
The record
- CVE
- CVE-2026-53005
- Published
- Jun 24, 2026
- Updated
- Jun 24, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-416, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 24, 2026CVE publishedPublication date reported by the CVE source.
- Jun 24, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=5.15
- Affected versionversion=c63829182c37c2d6d0608976d15fa61ebebe9e6b <965dc93481d1b80d341bdd16c27b16fe197175ee
- Affected versionversion=c63829182c37c2d6d0608976d15fa61ebebe9e6b <b34a1d83c74a124c968b5adb25c809db3e2eb86a
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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