CVE-2026-64371

Summary

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

proc: protect ptrace_may_access() with exec_update_lock (part 1)

Fix the easy cases where procfs currently calls ptrace_may_access() without exec_update_lock protection, where the fix is to simply add the extra lock or use mm_access():

  • do_task_stat(): grab exec_update_lock
  • proc_pid_wchan(): grab exec_update_lock
  • proc_map_files_lookup(): use mm_access() instead of get_task_mm()
  • proc_map_files_readdir(): use mm_access() instead of get_task_mm()
  • proc_ns_get_link(): grab exec_update_lock
  • proc_ns_readlink(): grab exec_update_lock

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxf83ce3e6b02d5e48b3a43b001390e2b58820389d < ae1e630bcaac739f625822078edbaea98366930daffected
LinuxLinuxf83ce3e6b02d5e48b3a43b001390e2b58820389d < d54f14655fd7d7b293698a8b6918563c4c0465e7affected
LinuxLinuxf83ce3e6b02d5e48b3a43b001390e2b58820389d < bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9affected
LinuxLinuxf83ce3e6b02d5e48b3a43b001390e2b58820389d < 7456ae990a9738962b33146916fabca62ae3d4e0affected
LinuxLinuxf83ce3e6b02d5e48b3a43b001390e2b58820389d < 4bfe8c481846cee52473a2f7d7b30ee8e6749fc4affected
LinuxLinuxf83ce3e6b02d5e48b3a43b001390e2b58820389d < f9b4b03ccc9c69bf7f7298d4559906ebea7143b3affected
LinuxLinuxf83ce3e6b02d5e48b3a43b001390e2b58820389d < c1cfd63326f5d09999134e9052c353faf738286eaffected
LinuxLinuxf83ce3e6b02d5e48b3a43b001390e2b58820389d < 6650527444dadc63d84aa939d14ecba4fadb2f69affected
LinuxLinux6b06d6282100dd5aacf7d45443d651a1995bd9c4affected
LinuxLinux334ed22054b2ec8477e4409e214fc139cf937ef6affected
LinuxLinux2.6.27.23 < 2.6.28affected
LinuxLinux2.6.29.3 < 2.6.30affected
LinuxLinux2.6.30affected
LinuxLinux0 < 2.6.30unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.4 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References