CVE-2026-64163: Linux kernel · test_kprobes: clear kprobes between test runs
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in ef5581bb30efb939cc2bf093475c6cc85258e5cd : update Linux kernel when convenient.
Data as of 30 Oct 2026, 13:33 UTC
Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- Patch
- Available – fixed in ef5581bb30efb939cc2bf093475c6cc85258e5cd, accc0004c501a9918313142282b094d408af06fb, 96515819d79f356f40da5540968d838ea570fab9 +3
Exploitation evidence
Disclosed: evidence found.
CVE published 19 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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AI-suggested
This vulnerability has been fixed in the Linux kernel. The fix involves clearing all kprobe data before each test run by updating the kprobes_test_init function. Users should update to a Linux kernel version that includes the fix identified by the provided commit hashes. No additional mitigation is required once the fix is applied.
Description
A vulnerability in the Linux kernel's kprobes test suite causes kernel crashes when running the kprobes sanity tests multiple times. The issue arises because kprobe structures retain leftover data between test runs, leading to registration failures and eventual kernel paging faults. The problem is fixed by clearing all kprobe data before each test run.
References
- git.kernel.org/stable/c/29ec976006dfab171a7e007976e38af56ce286e4 (opens in a new tab)
- git.kernel.org/stable/c/08d355936fcf70c81c94f9fe7310450b65c53399 (opens in a new tab)
- git.kernel.org/stable/c/accc0004c501a9918313142282b094d408af06fb (opens in a new tab)
- git.kernel.org/stable/c/1c24cf1fd67f6702c719ab73499392cb7af956ae (opens in a new tab)
- git.kernel.org/stable/c/96515819d79f356f40da5540968d838ea570fab9 (opens in a new tab)
- git.kernel.org/stable/c/ef5581bb30efb939cc2bf093475c6cc85258e5cd (opens in a new tab)