Linux vulnerability

What happened

In the Linux kernel, the following vulnerability has been resolved: posix-cpu-timers: Fix pid refcount leak in do_cpu_nanosleep() error path In do_cpu_nanosleep(), posix_cpu_timer_create() takes a pid reference via get_pid() and stores it in timer.it.cpu.pid. If the subsequent posix_cpu_timer_set() call fails, the function returns immediately without calling posix_cpu_timer_del() to release the pid reference, causing a leak. Fix it by calling posix_cpu_timer_del() before the unlock-and-return on the error path, consistent with the other exit paths in the same function.

Affected versions

Linux: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before afed3cdc1cca133f804fcf57ff228974f424b23a (git); 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before 8a270b1258797f61b61da44f8bfd41a581b5c85b (git); 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before d605d00085adc3fddf67de01dc2a44aebf1a3fb5 (git); 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before e5ffc638faf5dc7d9dc85c9a95e10bf97442e0c0 (git); 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before eb4cec29a78334d09bcfb41c0660cdd62ba05843 (git); 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before 7776f9226e99eb49d97492b0b445027cfcb189da (git); 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before 8f06363446c5d043c9a7c008b250040e9de98cf9 (git); 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before 87bd2ad568e15b90d5f7d4bcd70342d05dad649c (git); 2.6.12; V3.1.6 through before * (custom) Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.