Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook The commit 1879445dfa7b ("perf/core: Set event's default ::overflow_handler()") set a default event->overflow_handler in perf_event_alloc(), and replace the check event->overflow_handler with is_default_overflow_handler(), but one is missing. Currently, the bp->overflow_handler can not be NULL. As a result, enable_single_step() is always not invoked. Comments from Zhen Lei: https://patchwork.kernel.org/project/linux-arm-kernel/patch/[email protected]/
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.7, < 4.9.269 |
References
- https://git.kernel.org/stable/c/3ed8832aeaa9a37b0fc386bb72ff604352567c80Patch
- https://git.kernel.org/stable/c/555a70f7fff03bd669123487905c47ae27dbdaacPatch
- https://git.kernel.org/stable/c/630146203108bf6b8934eec0dfdb3e46dcb917dePatch
- https://git.kernel.org/stable/c/7eeacc6728c5478e3c01bc82a1f08958eaa12366Patch
- https://git.kernel.org/stable/c/a506bd5756290821a4314f502b4bafc2afcf5260Patch
- https://git.kernel.org/stable/c/a9938d6d78a238d6ab8de57a4d3dcf77adceb9bbPatch
- https://git.kernel.org/stable/c/dabe299425b1a53a69461fed7ac8922ea6733a25Patch
- https://git.kernel.org/stable/c/ed1f67465327cec4457bb988775245b199da86e6Patch
- https://git.kernel.org/stable/c/3ed8832aeaa9a37b0fc386bb72ff604352567c80Patch
- https://git.kernel.org/stable/c/555a70f7fff03bd669123487905c47ae27dbdaacPatch
- https://git.kernel.org/stable/c/630146203108bf6b8934eec0dfdb3e46dcb917dePatch
- https://git.kernel.org/stable/c/7eeacc6728c5478e3c01bc82a1f08958eaa12366Patch
- https://git.kernel.org/stable/c/a506bd5756290821a4314f502b4bafc2afcf5260Patch
- https://git.kernel.org/stable/c/a9938d6d78a238d6ab8de57a4d3dcf77adceb9bbPatch
- https://git.kernel.org/stable/c/dabe299425b1a53a69461fed7ac8922ea6733a25Patch
FAQ
What is CVE-2021-47006?
CVE-2021-47006 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: ARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook The commit 1879445dfa7b ("perf/core: Set event...
How severe is CVE-2021-47006?
CVE-2021-47006 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-47006?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.