In the Linux kernel, the following vulnerability has been resolved: test_kprobes: clear kprobes between test runs Running the kprobes sanity tests… (CVE-2026-64163)
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 kprobes data is not fully cleared between test runs, leading to registration failures and kernel paging faults.
AI Analysis
Technical Summary
The Linux kernel's kprobes test suite does not properly clear all kprobe data between consecutive test runs. Specifically, after register_kprobe and unregister_kprobe calls, some leftover data remains in kprobe structures, causing subsequent registration attempts to fail and eventually crash the kernel. The fix involves moving cleanup code for all kprobes into the kprobes_test_init function, which is called before each test, ensuring proper clearing of address and flags fields to prevent leftover data from causing failures.
Potential Impact
Repeated execution of the kprobes sanity tests can cause all tests to fail and lead to kernel crashes due to improper clearing of kprobe data structures. This results in denial of service (kernel crash) but does not impact confidentiality or integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The described fix involves code changes to ensure proper clearing of kprobe data between test runs. Until an official patch is confirmed, avoid running the kprobes sanity tests multiple times in succession.
In the Linux kernel, the following vulnerability has been resolved: test_kprobes: clear kprobes between test runs Running the kprobes sanity tests… (CVE-2026-64163)
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 kprobes data is not fully cleared between test runs, leading to registration failures and kernel paging faults.
CVSS v3.1
Score 5.5medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel's kprobes test suite does not properly clear all kprobe data between consecutive test runs. Specifically, after register_kprobe and unregister_kprobe calls, some leftover data remains in kprobe structures, causing subsequent registration attempts to fail and eventually crash the kernel. The fix involves moving cleanup code for all kprobes into the kprobes_test_init function, which is called before each test, ensuring proper clearing of address and flags fields to prevent leftover data from causing failures.
Potential Impact
Repeated execution of the kprobes sanity tests can cause all tests to fail and lead to kernel crashes due to improper clearing of kprobe data structures. This results in denial of service (kernel crash) but does not impact confidentiality or integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The described fix involves code changes to ensure proper clearing of kprobe data between test runs. Until an official patch is confirmed, avoid running the kprobes sanity tests multiple times in succession.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-9292-g249-69fp
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64163"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a5d27a82a4a8d598912a54f
Added to database: 07/19/2026, 19:38:16 UTC
Last enriched: 08/13/2026, 19:13:35 UTC
Last updated: 08/31/2026, 22:52:13 UTC
Views: 50
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