Local privilege escalation via shared-page ARP rewrite
Published Jun 25, 2026 · Updated Jun 25, 2026
Memory corruption in the Linux Kernel ebtables SNAT target allows local users to overwrite shared pages during ARP address rewriting. The target calls skb_store_bits() after skb_header_pointer() supplies only safe read access, leaving nonlinear splice-backed fragments shared. Exploitation requires CAP_NET_ADMIN and an ARP-rewriting ebtables SNAT rule; successful writes can corrupt file or process memory or crash the kernel.
Summary
What happened
Memory corruption in the Linux Kernel ebtables SNAT target allows local users to overwrite shared pages during ARP address rewriting. The target calls skb_store_bits() after skb_header_pointer() supplies only safe read access, leaving nonlinear splice-backed fragments shared. Exploitation requires CAP_NET_ADMIN and an ARP-rewriting ebtables SNAT rule; successful writes can corrupt file or process memory or crash the kernel.
The record
- CVE
- CVE-2026-53266
- Published
- Jun 25, 2026
- Updated
- Jun 25, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-825, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 25, 2026CVE publishedPublication date reported by the CVE source.
- Jun 25, 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=2f3839075a5f8dcf116c1abe35b36b018ac62445
- Affected versionversion=5.10
- Affected versionversion=51ba2945a8ef65ae437c8f9ba05f0343aa82ae5b
- Affected versionversion=5.4.73 <5.5
- Affected versionversion=5.8.17 <5.9
- Affected versionversion=5.9.2 <5.10
- Affected versionversion=63137bc5882a1882c553d389fdeeeace86ee1741 <153ea96c806aea395daba907a4f88480b6ad5093
- Affected versionversion=63137bc5882a1882c553d389fdeeeace86ee1741 <67ba971ae02514d85818fe0c32549ab4bfa3bf49
- Affected versionversion=63137bc5882a1882c553d389fdeeeace86ee1741 <76280b78cc9f23bdc6438e10ad6dff148ef8375b
- Affected versionversion=63137bc5882a1882c553d389fdeeeace86ee1741 <afd64b59c3de9bbbdd3759e834fdc55cda716e0b
- Affected versionversion=63137bc5882a1882c553d389fdeeeace86ee1741 <b18675263db1147c8e1cab625400c13a0d87bd2d
- Affected versionversion=63137bc5882a1882c553d389fdeeeace86ee1741 <b7e91939ba9be805a62a257fa4e227dffbb88fa0
- Affected versionversion=63137bc5882a1882c553d389fdeeeace86ee1741 <bf84ad7c7a9ede46e31afaa41a1ba06a159e8c87
- Affected versionversion=63137bc5882a1882c553d389fdeeeace86ee1741 <c9b5ff59feffb92a147a84a5aa28acd2cb8ff4c5
- Affected versionversion=b7d23c2c87584eb429f115c078ed511be8b18e29
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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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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