Kernel memory disclosure and panic via unterminated name
Published Jul 25, 2026 · Updated Jul 25, 2026
Out-of-bounds read in Linux Kernel allows local users to disclose kernel memory or trigger a repeatable kernel panic via setsockopt. The ebtables replacement path passes an attacker-controlled match name without a terminating null byte to request_module(), whose string formatting reads past the table allocation. The path requires CAP_NET_ADMIN in the socket network namespace; deployments permitting unprivileged user namespaces can grant that capability without host-level administrative access.
Summary
What happened
Out-of-bounds read in Linux Kernel allows local users to disclose kernel memory or trigger a repeatable kernel panic via setsockopt. The ebtables replacement path passes an attacker-controlled match name without a terminating null byte to request_module(), whose string formatting reads past the table allocation. The path requires CAP_NET_ADMIN in the socket network namespace; deployments permitting unprivileged user namespaces can grant that capability without host-level administrative access.
The record
- CVE
- CVE-2026-64412
- Published
- Jul 25, 2026
- Updated
- Jul 25, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 25, 2026CVE publishedPublication date reported by the CVE source.
- Jul 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=4.6
- Affected versionversion=bcf4934288402be3464110109a4dae3bd6fb3e93 <084d23f818321390509e9738a0b08bbf46df6425
- Affected versionversion=bcf4934288402be3464110109a4dae3bd6fb3e93 <0ddca0f90fa3395111d078ae4399615cf3ea94aa
- Affected versionversion=bcf4934288402be3464110109a4dae3bd6fb3e93 <13a5f532e3a4fc75c33060a026def1572c208643
- Affected versionversion=bcf4934288402be3464110109a4dae3bd6fb3e93 <43dd2332b8a27b3ac5108791680cade654ab0f96
- Affected versionversion=bcf4934288402be3464110109a4dae3bd6fb3e93 <5777c8f1c3610786d8482b8f620f40fccaf1542b
- Affected versionversion=bcf4934288402be3464110109a4dae3bd6fb3e93 <7b217960e88b5d2d1e8cdcbcaf3bdf6fe199a0c8
- Affected versionversion=bcf4934288402be3464110109a4dae3bd6fb3e93 <d2367d99f2455f373996d9ddbe833dbe9f942213
- Affected versionversion=bcf4934288402be3464110109a4dae3bd6fb3e93 <da32e78bbb187ed7b137e0007034185570a3a172
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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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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