CVE-2017-18261

Name: CVE-2017-18261
Creator: NVD / NIST
Published: 2018-04-19T08:29:00.207+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.34%

Last modified Jun 17, 2026

CVE-2017-18261 is a vulnerability of currently unknown severity. The arch_timer_reg_read_stable macro in arch/arm64/include/asm/arch_timer.h in the Linux kernel before 4.13 allows local users to cause a denial of service (infinite recursion) by writing to a file under /sys/kernel/debug in certain circumstances, as demonstrated by a scenario involving debugfs, ftrace, PREEMPT_TRACER, and FUNCTION_GRAPH_TRACER.. EPSS estimates a 0.34% chance of exploitation in the next 30 days.

Description

The arch_timer_reg_read_stable macro in arch/arm64/include/asm/arch_timer.h in the Linux kernel before 4.13 allows local users to cause a denial of service (infinite recursion) by writing to a file under /sys/kernel/debug in certain circumstances, as demonstrated by a scenario involving debugfs, ftrace, PREEMPT_TRACER, and FUNCTION_GRAPH_TRACER.

Metrics

EPSS Probability

0.34%

25.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-835

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 4.13

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=adb4f11e0a8f4e29900adb2b7af28b6bbd5c1fa4Patch, Vendor Advisory
https://github.com/torvalds/linux/commit/adb4f11e0a8f4e29900adb2b7af28b6bbd5c1fa4Patch, Vendor Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=adb4f11e0a8f4e29900adb2b7af28b6bbd5c1fa4Patch, Vendor Advisory
https://github.com/torvalds/linux/commit/adb4f11e0a8f4e29900adb2b7af28b6bbd5c1fa4Patch, Vendor Advisory

Timeline

Published: Apr 19, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-18261?

How severe is CVE-2017-18261?

Severity scoring for CVE-2017-18261 is pending analysis. The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.

How do I fix CVE-2017-18261?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-18261?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST