5.5
MEDIUM
CVSS 3.1
CVE-2026-64371
proc: protect ptrace_may_access() with exec_update_lock (part 1)
Overview
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
Details
INFO
Published Date :
July 25, 2026, 10:17 a.m.
Last Modified :
Sept. 8, 2026, 3:23 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
Apply Linux kernel security updates to protect ptrace_may_access() function.
- Update the Linux kernel.
- Ensure exec_update_lock protects ptrace_may_access().
- Use mm_access() where appropriate.
- Verify lock protection in procfs calls.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64371.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64371 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64371
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64371 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64371 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Sep. 08, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:2.6.30:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.30:rc8:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.30:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.30:rc7:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.30:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.212 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.178 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.145 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.1.4 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.40 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.97 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.27.23 up to (excluding) 2.6.28 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.29.3 up to (excluding) 2.6.30 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.30.1 up to (excluding) 5.10.261 Added Reference Type kernel.org: https://git.kernel.org/stable/c/4bfe8c481846cee52473a2f7d7b30ee8e6749fc4 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6650527444dadc63d84aa939d14ecba4fadb2f69 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/7456ae990a9738962b33146916fabca62ae3d4e0 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/ae1e630bcaac739f625822078edbaea98366930d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/c1cfd63326f5d09999134e9052c353faf738286e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d54f14655fd7d7b293698a8b6918563c4c0465e7 Types: Patch Added Reference Type siemens-SADP: https://cert-portal.siemens.com/productcert/html/ssa-019113.html Types: Third Party Advisory Added Reference Type kernel.org: https://git.kernel.org/stable/c/f9b4b03ccc9c69bf7f7298d4559906ebea7143b3 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 08, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/4bfe8c481846cee52473a2f7d7b30ee8e6749fc4 Added Reference https://git.kernel.org/stable/c/6650527444dadc63d84aa939d14ecba4fadb2f69 Added Reference https://git.kernel.org/stable/c/7456ae990a9738962b33146916fabca62ae3d4e0 Added Reference https://git.kernel.org/stable/c/ae1e630bcaac739f625822078edbaea98366930d Added Reference https://git.kernel.org/stable/c/bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9 Added Reference https://git.kernel.org/stable/c/c1cfd63326f5d09999134e9052c353faf738286e Added Reference https://git.kernel.org/stable/c/d54f14655fd7d7b293698a8b6918563c4c0465e7 Added Reference https://git.kernel.org/stable/c/f9b4b03ccc9c69bf7f7298d4559906ebea7143b3 Removed Reference https://git.kernel.org/stable/c/4bfe8c481846cee52473a2f7d7b30ee8e6749fc4 Removed Reference https://git.kernel.org/stable/c/6650527444dadc63d84aa939d14ecba4fadb2f69 Removed Reference https://git.kernel.org/stable/c/7456ae990a9738962b33146916fabca62ae3d4e0 Removed Reference https://git.kernel.org/stable/c/ae1e630bcaac739f625822078edbaea98366930d Removed Reference https://git.kernel.org/stable/c/bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9 Removed Reference https://git.kernel.org/stable/c/c1cfd63326f5d09999134e9052c353faf738286e Removed Reference https://git.kernel.org/stable/c/d54f14655fd7d7b293698a8b6918563c4c0465e7 Removed Reference https://git.kernel.org/stable/c/f9b4b03ccc9c69bf7f7298d4559906ebea7143b3 -
CVE Modified by 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Sep. 08, 2026
Action Type Old Value New Value Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/64xxx/CVE-2026-64371.json">CVE-2026-64371</a> Added Reference https://cert-portal.siemens.com/productcert/html/ssa-019113.html -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': 'ae1e630bcaac739f625822078edbaea98366930d', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': 'd54f14655fd7d7b293698a8b6918563c4c0465e7', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': 'bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': '7456ae990a9738962b33146916fabca62ae3d4e0', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': '4bfe8c481846cee52473a2f7d7b30ee8e6749fc4', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': 'f9b4b03ccc9c69bf7f7298d4559906ebea7143b3', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': 'c1cfd63326f5d09999134e9052c353faf738286e', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': '6650527444dadc63d84aa939d14ecba4fadb2f69', 'versionType': 'git'}, {'status': 'affected', 'version': '6b06d6282100dd5aacf7d45443d651a1995bd9c4', 'versionType': 'git'}, {'status': 'affected', 'version': '334ed22054b2ec8477e4409e214fc139cf937ef6', 'versionType': 'git'}, {'status': 'affected', 'version': '2.6.27.23', 'lessThan': '2.6.28', 'versionType': 'semver'}, {'status': 'affected', 'version': '2.6.29.3', 'lessThan': '2.6.30', 'versionType': 'semver'}], 'programFiles': ['fs/proc/array.c', 'fs/proc/base.c', 'fs/proc/namespaces.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.30'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.30', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/proc/array.c', 'fs/proc/base.c', 'fs/proc/namespaces.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': 'ae1e630bcaac739f625822078edbaea98366930d', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': 'd54f14655fd7d7b293698a8b6918563c4c0465e7', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': 'bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': '7456ae990a9738962b33146916fabca62ae3d4e0', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': '4bfe8c481846cee52473a2f7d7b30ee8e6749fc4', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': 'f9b4b03ccc9c69bf7f7298d4559906ebea7143b3', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': 'c1cfd63326f5d09999134e9052c353faf738286e', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': '6650527444dadc63d84aa939d14ecba4fadb2f69', 'versionType': 'git'}, {'status': 'affected', 'version': '6b06d6282100dd5aacf7d45443d651a1995bd9c4', 'versionType': 'git'}, {'status': 'affected', 'version': '334ed22054b2ec8477e4409e214fc139cf937ef6', 'versionType': 'git'}, {'status': 'affected', 'version': '2.6.27.23', 'lessThan': '2.6.28', 'versionType': 'semver'}, {'status': 'affected', 'version': '2.6.29.3', 'lessThan': '2.6.30', 'versionType': 'semver'}], 'programFiles': ['fs/proc/array.c', 'fs/proc/base.c', 'fs/proc/namespaces.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.30'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.30', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/proc/array.c', 'fs/proc/base.c', 'fs/proc/namespaces.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 25, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': 'ae1e630bcaac739f625822078edbaea98366930d', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': 'd54f14655fd7d7b293698a8b6918563c4c0465e7', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': 'bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': '7456ae990a9738962b33146916fabca62ae3d4e0', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': '4bfe8c481846cee52473a2f7d7b30ee8e6749fc4', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': 'f9b4b03ccc9c69bf7f7298d4559906ebea7143b3', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': 'c1cfd63326f5d09999134e9052c353faf738286e', 'versionType': 'git'}, {'status': 'affected', 'version': 'f83ce3e6b02d5e48b3a43b001390e2b58820389d', 'lessThan': '6650527444dadc63d84aa939d14ecba4fadb2f69', 'versionType': 'git'}, {'status': 'affected', 'version': '6b06d6282100dd5aacf7d45443d651a1995bd9c4', 'versionType': 'git'}, {'status': 'affected', 'version': '334ed22054b2ec8477e4409e214fc139cf937ef6', 'versionType': 'git'}, {'status': 'affected', 'version': '2.6.27.23', 'lessThan': '2.6.28', 'versionType': 'semver'}, {'status': 'affected', 'version': '2.6.29.3', 'lessThan': '2.6.30', 'versionType': 'semver'}], 'programFiles': ['fs/proc/array.c', 'fs/proc/base.c', 'fs/proc/namespaces.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.30'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.30', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/proc/array.c', 'fs/proc/base.c', 'fs/proc/namespaces.c'], 'defaultStatus': 'affected'}] Added 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 Added Reference https://git.kernel.org/stable/c/4bfe8c481846cee52473a2f7d7b30ee8e6749fc4 Added Reference https://git.kernel.org/stable/c/6650527444dadc63d84aa939d14ecba4fadb2f69 Added Reference https://git.kernel.org/stable/c/7456ae990a9738962b33146916fabca62ae3d4e0 Added Reference https://git.kernel.org/stable/c/ae1e630bcaac739f625822078edbaea98366930d Added Reference https://git.kernel.org/stable/c/bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9 Added Reference https://git.kernel.org/stable/c/c1cfd63326f5d09999134e9052c353faf738286e Added Reference https://git.kernel.org/stable/c/d54f14655fd7d7b293698a8b6918563c4c0465e7 Added Reference https://git.kernel.org/stable/c/f9b4b03ccc9c69bf7f7298d4559906ebea7143b3
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.