CVE-2023-54139

Summary

In the Linux kernel, the following vulnerability has been resolved:

tracing/user_events: Ensure write index cannot be negative

The write index indicates which event the data is for and accesses a per-file array. The index is passed by user processes during write() calls as the first 4 bytes. Ensure that it cannot be negative by returning -EINVAL to prevent out of bounds accesses.

Update ftrace self-test to ensure this occurs properly.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7f5a08c79df35e68f1a43033450c5050f12bc155 < 0489c2b2c3104b89f078dbcec8c744dfc157d3e9affected
LinuxLinux7f5a08c79df35e68f1a43033450c5050f12bc155 < 4fe46b5adf18e3dc606e62c9e6a0413398a17572affected
LinuxLinux7f5a08c79df35e68f1a43033450c5050f12bc155 < fa7f2f5d1739452280c22727c4384a52b72ab5deaffected
LinuxLinux7f5a08c79df35e68f1a43033450c5050f12bc155 < cd98c93286a30cc4588dfd02453bec63c2f4acf4affected
LinuxLinux5.18affected
LinuxLinux0 < 5.18unaffected
LinuxLinux6.1.28 <= 6.1.*unaffected
LinuxLinux6.2.15 <= 6.2.*unaffected
LinuxLinux6.3.2 <= 6.3.*unaffected
LinuxLinux6.4 <= *unaffected

Weaknesses

References