CVE-2026-64371

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

State: Published
Severity: Not scored
Published: Jul 25, 2026
Updated: Oct 15, 2026
Reserved: Jul 19, 2026

Description

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

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	f83ce3e6b02d5e48b3a43b001390e2b58820389d to before ae1e630bcaac739f625822078edbaea98366930dAffected f83ce3e6b02d5e48b3a43b001390e2b58820389d to before d54f14655fd7d7b293698a8b6918563c4c0465e7Affected f83ce3e6b02d5e48b3a43b001390e2b58820389d to before bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9Affected f83ce3e6b02d5e48b3a43b001390e2b58820389d to before 7456ae990a9738962b33146916fabca62ae3d4e0Affected f83ce3e6b02d5e48b3a43b001390e2b58820389d to before 4bfe8c481846cee52473a2f7d7b30ee8e6749fc4Affected f83ce3e6b02d5e48b3a43b001390e2b58820389d to before f9b4b03ccc9c69bf7f7298d4559906ebea7143b3Affected f83ce3e6b02d5e48b3a43b001390e2b58820389d to before c1cfd63326f5d09999134e9052c353faf738286eAffected f83ce3e6b02d5e48b3a43b001390e2b58820389d to before 6650527444dadc63d84aa939d14ecba4fadb2f69Affected 6b06d6282100dd5aacf7d45443d651a1995bd9c4Affected 334ed22054b2ec8477e4409e214fc139cf937ef6Affected 2.6.27.23 to before 2.6.28Affected 2.6.29.3 to before 2.6.30Affected
LinuxLinux	2.6.30Affected before 2.6.30Not affected 5.10.261 through 5.10.Not affected 5.15.212 through 5.15.Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.97 through 6.12.Not affected 6.18.40 through 6.18.Not affected 7.1.4 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

f83ce3e6b02d5e48b3a43b001390e2b58820389d to before ae1e630bcaac739f625822078edbaea98366930dAffected
f83ce3e6b02d5e48b3a43b001390e2b58820389d to before d54f14655fd7d7b293698a8b6918563c4c0465e7Affected
f83ce3e6b02d5e48b3a43b001390e2b58820389d to before bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9Affected
f83ce3e6b02d5e48b3a43b001390e2b58820389d to before 7456ae990a9738962b33146916fabca62ae3d4e0Affected
f83ce3e6b02d5e48b3a43b001390e2b58820389d to before 4bfe8c481846cee52473a2f7d7b30ee8e6749fc4Affected
f83ce3e6b02d5e48b3a43b001390e2b58820389d to before f9b4b03ccc9c69bf7f7298d4559906ebea7143b3Affected
f83ce3e6b02d5e48b3a43b001390e2b58820389d to before c1cfd63326f5d09999134e9052c353faf738286eAffected
f83ce3e6b02d5e48b3a43b001390e2b58820389d to before 6650527444dadc63d84aa939d14ecba4fadb2f69Affected
6b06d6282100dd5aacf7d45443d651a1995bd9c4Affected
334ed22054b2ec8477e4409e214fc139cf937ef6Affected
2.6.27.23 to before 2.6.28Affected
2.6.29.3 to before 2.6.30Affected

LinuxLinux

2.6.30Affected
before 2.6.30Not affected
5.10.261 through 5.10.*Not affected
5.15.212 through 5.15.*Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.97 through 6.12.*Not affected
6.18.40 through 6.18.*Not affected
7.1.4 through 7.1.*Not affected
7.2 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.