Kernel pointer disclosure via stale sock_ops register
Published Jun 24, 2026 · Updated Jun 24, 2026
Out-of-bounds read in Linux Kernel BPF sock_ops allows local users to disclose kernel pointers through crafted same-register programs. The SOCK_OPS_GET_SK and SOCK_OPS_GET_FIELD macros fail to zero dst_reg after borrowing a temporary register when dst_reg equals src_reg and the full-socket check fails. Loading and attaching the program requires local BPF and network-administration privileges; the stale context pointer can drive a stack out-of-bounds read or be exposed as a scalar kernel address.
Summary
What happened
Out-of-bounds read in Linux Kernel BPF sock_ops allows local users to disclose kernel pointers through crafted same-register programs. The SOCK_OPS_GET_SK and SOCK_OPS_GET_FIELD macros fail to zero dst_reg after borrowing a temporary register when dst_reg equals src_reg and the full-socket check fails. Loading and attaching the program requires local BPF and network-administration privileges; the stale context pointer can drive a stack out-of-bounds read or be exposed as a scalar kernel address.
The record
- CVE
- CVE-2026-53078
- Published
- Jun 24, 2026
- Updated
- Jun 24, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-125, 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=48be3df15aa19c04eadf156c9129293c9a10389f
- Affected versionversion=5.4.61 <5.5
- Affected versionversion=5.7.18 <5.8
- Affected versionversion=5.8.4 <5.9
- Affected versionversion=5.9
- Affected versionversion=6e0bc946cbeec538322820786b5fb5200a2216ab
- Affected versionversion=a7e52f7f675046d9ffc5692d815fa67c82fcdbf5
- Affected versionversion=cd4644d904e1d153d516e73e2e127e7a2fe687e1
- Affected versionversion=db7f8c57dbdd31f7e59f8dc8d1e1b38607a320ef
- Affected versionversion=fd09af010788a884de1c39537c288830c3d305db <10f86a2a5c91fc4c4d001960f1c21abe52545ef6
- Affected versionversion=fd09af010788a884de1c39537c288830c3d305db <18e3ffde1822f0b48b1753bf34aa97ce839df1d8
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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