Race condition in Linux kernel - CVE-2026-46272
Published: June 4, 2026
Vulnerability identifier: #VU133309
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-46272
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a race condition in the coresight tmc-etr sysfs and perf mode handling in drivers/hwtracing/coresight/coresight-tmc-etr.c when enabling sysfs mode concurrently with perf mode. A local user can trigger concurrent sysfs and perf operations to cause a denial of service.
The issue can trigger a WARN_ON() in tmc_etr_enable_hw() when sysfs buffer allocation and hardware enablement occur in separate critical regions.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-46272
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.115-2
linux (Debian package) - update to 6.12.115-2