7.8
HIGH
CVSS 3.1
CVE-2026-64375
proc: protect ptrace_may_access() with exec_update_lock (FD links)
Overview
Description
In the Linux kernel, the following vulnerability has been resolved: proc: protect ptrace_may_access() with exec_update_lock (FD links) proc_pid_get_link() and proc_pid_readlink() currently look up the task from the pid once, then do the ptrace access check on that task, then look up the task from the pid a second time to do the actual access. That's racy in several ways. To fix it, pass the task to the ->proc_get_link() handler, and instead of proc_fd_access_allowed(), introduce a new helper call_proc_get_link() that looks up and locks the task, does the access check, and calls ->proc_get_link().
Details
INFO
Published Date :
July 25, 2026, 10:17 a.m.
Last Modified :
Sept. 8, 2026, 2:31 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 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
Address race conditions in procfs by locking and validating task access before operations.
- Apply kernel patches to protect ptrace_may_access.
- Update the kernel to include exec_update_lock protection.
- Ensure task lookups are locked during access checks.
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-2026-64375.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64375 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-2026-64375
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-2026-64375 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64375 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 CWE NVD-CWE-noinfo Added CPE Configuration OR *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) 2.6.18 up to (excluding) 5.10.261 Added Reference Type kernel.org: https://git.kernel.org/stable/c/138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/497c6bae5167428596575f20af6613ff5671f383 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6253dfee5afba536bb54fc6fe6c091c3758fafe1 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6255da28d4bb5349fe18e84cb043ccd394eba75d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/65bf0d2b6e914f1448d6a2fde193dcf60936a651 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/83b17872e3166c295c599279fc9562ac3840c638 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf 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/dfd1894cb64cbd8758b461ed713800fe73db4f82 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/138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2 Added Reference https://git.kernel.org/stable/c/497c6bae5167428596575f20af6613ff5671f383 Added Reference https://git.kernel.org/stable/c/6253dfee5afba536bb54fc6fe6c091c3758fafe1 Added Reference https://git.kernel.org/stable/c/6255da28d4bb5349fe18e84cb043ccd394eba75d Added Reference https://git.kernel.org/stable/c/65bf0d2b6e914f1448d6a2fde193dcf60936a651 Added Reference https://git.kernel.org/stable/c/83b17872e3166c295c599279fc9562ac3840c638 Added Reference https://git.kernel.org/stable/c/de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf Added Reference https://git.kernel.org/stable/c/dfd1894cb64cbd8758b461ed713800fe73db4f82 Removed Reference https://git.kernel.org/stable/c/138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2 Removed Reference https://git.kernel.org/stable/c/497c6bae5167428596575f20af6613ff5671f383 Removed Reference https://git.kernel.org/stable/c/6253dfee5afba536bb54fc6fe6c091c3758fafe1 Removed Reference https://git.kernel.org/stable/c/6255da28d4bb5349fe18e84cb043ccd394eba75d Removed Reference https://git.kernel.org/stable/c/65bf0d2b6e914f1448d6a2fde193dcf60936a651 Removed Reference https://git.kernel.org/stable/c/83b17872e3166c295c599279fc9562ac3840c638 Removed Reference https://git.kernel.org/stable/c/de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf Removed Reference https://git.kernel.org/stable/c/dfd1894cb64cbd8758b461ed713800fe73db4f82 -
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-2026-64375.json">CVE-2026-64375</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': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '6253dfee5afba536bb54fc6fe6c091c3758fafe1', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '65bf0d2b6e914f1448d6a2fde193dcf60936a651', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': 'de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '83b17872e3166c295c599279fc9562ac3840c638', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '497c6bae5167428596575f20af6613ff5671f383', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': 'dfd1894cb64cbd8758b461ed713800fe73db4f82', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '6255da28d4bb5349fe18e84cb043ccd394eba75d', 'versionType': 'git'}], 'programFiles': ['fs/proc/base.c', 'fs/proc/fd.c', 'fs/proc/internal.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.18', '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/base.c', 'fs/proc/fd.c', 'fs/proc/internal.h'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '6253dfee5afba536bb54fc6fe6c091c3758fafe1', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '65bf0d2b6e914f1448d6a2fde193dcf60936a651', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': 'de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '83b17872e3166c295c599279fc9562ac3840c638', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '497c6bae5167428596575f20af6613ff5671f383', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': 'dfd1894cb64cbd8758b461ed713800fe73db4f82', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '6255da28d4bb5349fe18e84cb043ccd394eba75d', 'versionType': 'git'}], 'programFiles': ['fs/proc/base.c', 'fs/proc/fd.c', 'fs/proc/internal.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.18', '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/base.c', 'fs/proc/fd.c', 'fs/proc/internal.h'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 27, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
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': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '6253dfee5afba536bb54fc6fe6c091c3758fafe1', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '65bf0d2b6e914f1448d6a2fde193dcf60936a651', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': 'de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '83b17872e3166c295c599279fc9562ac3840c638', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '497c6bae5167428596575f20af6613ff5671f383', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': 'dfd1894cb64cbd8758b461ed713800fe73db4f82', 'versionType': 'git'}, {'status': 'affected', 'version': '778c1144771f0064b6f51bee865cceb0d996f2f9', 'lessThan': '6255da28d4bb5349fe18e84cb043ccd394eba75d', 'versionType': 'git'}], 'programFiles': ['fs/proc/base.c', 'fs/proc/fd.c', 'fs/proc/internal.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.18', '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/base.c', 'fs/proc/fd.c', 'fs/proc/internal.h'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: proc: protect ptrace_may_access() with exec_update_lock (FD links) proc_pid_get_link() and proc_pid_readlink() currently look up the task from the pid once, then do the ptrace access check on that task, then look up the task from the pid a second time to do the actual access. That's racy in several ways. To fix it, pass the task to the ->proc_get_link() handler, and instead of proc_fd_access_allowed(), introduce a new helper call_proc_get_link() that looks up and locks the task, does the access check, and calls ->proc_get_link(). Added Reference https://git.kernel.org/stable/c/138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2 Added Reference https://git.kernel.org/stable/c/497c6bae5167428596575f20af6613ff5671f383 Added Reference https://git.kernel.org/stable/c/6253dfee5afba536bb54fc6fe6c091c3758fafe1 Added Reference https://git.kernel.org/stable/c/6255da28d4bb5349fe18e84cb043ccd394eba75d Added Reference https://git.kernel.org/stable/c/65bf0d2b6e914f1448d6a2fde193dcf60936a651 Added Reference https://git.kernel.org/stable/c/83b17872e3166c295c599279fc9562ac3840c638 Added Reference https://git.kernel.org/stable/c/de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf Added Reference https://git.kernel.org/stable/c/dfd1894cb64cbd8758b461ed713800fe73db4f82
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.