CVE-2026-64371 - Vulnerability Details

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

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

Published: 2026-07-25

Score: 7.0 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`f83ce3e6b02d5e48b3a43b001390e2b58820389d`	affected	< ae1e630bcaac739f625822078edbaea98366930d
`f83ce3e6b02d5e48b3a43b001390e2b58820389d`	affected	< d54f14655fd7d7b293698a8b6918563c4c0465e7
`f83ce3e6b02d5e48b3a43b001390e2b58820389d`	affected	< bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9
`f83ce3e6b02d5e48b3a43b001390e2b58820389d`	affected	< 7456ae990a9738962b33146916fabca62ae3d4e0
`f83ce3e6b02d5e48b3a43b001390e2b58820389d`	affected	< 4bfe8c481846cee52473a2f7d7b30ee8e6749fc4
`f83ce3e6b02d5e48b3a43b001390e2b58820389d`	affected	< f9b4b03ccc9c69bf7f7298d4559906ebea7143b3
`f83ce3e6b02d5e48b3a43b001390e2b58820389d`	affected	< c1cfd63326f5d09999134e9052c353faf738286e
`f83ce3e6b02d5e48b3a43b001390e2b58820389d`	affected	< 6650527444dadc63d84aa939d14ecba4fadb2f69
`6b06d6282100dd5aacf7d45443d651a1995bd9c4`	affected	—
`334ed22054b2ec8477e4409e214fc139cf937ef6`	affected	—
`2.6.27.23`	affected	< 2.6.28
`2.6.29.3`	affected	< 2.6.30

Linux

affected

Version	Status	Constraints
`2.6.30`	affected	—
`0`	unaffected	< 2.6.30
`5.10.261`	unaffected	≤ 5.10.*
`5.15.212`	unaffected	≤ 5.15.*
`6.1.178`	unaffected	≤ 6.1.*
`6.6.145`	unaffected	≤ 6.6.*
`6.12.97`	unaffected	≤ 6.12.*
`6.18.40`	unaffected	≤ 6.18.*
`7.1.4`	unaffected	≤ 7.1.*
`7.2-rc1`	unaffected	≤ *

No data.

Vendor Product Confidence Versions

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`[f83ce3e6b02d5e48b3a43b001390e2b58820389d,ae1e630bcaac739f625822078edbaea98366930d)`	affected	code_commit	—
`[f83ce3e6b02d5e48b3a43b001390e2b58820389d,d54f14655fd7d7b293698a8b6918563c4c0465e7)`	affected	code_commit	—
`[f83ce3e6b02d5e48b3a43b001390e2b58820389d,bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9)`	affected	code_commit	—
`[f83ce3e6b02d5e48b3a43b001390e2b58820389d,7456ae990a9738962b33146916fabca62ae3d4e0)`	affected	code_commit	—
`[f83ce3e6b02d5e48b3a43b001390e2b58820389d,4bfe8c481846cee52473a2f7d7b30ee8e6749fc4)`	affected	code_commit	—
`[f83ce3e6b02d5e48b3a43b001390e2b58820389d,f9b4b03ccc9c69bf7f7298d4559906ebea7143b3)`	affected	code_commit	—
`[f83ce3e6b02d5e48b3a43b001390e2b58820389d,c1cfd63326f5d09999134e9052c353faf738286e)`	affected	code_commit	—
`[f83ce3e6b02d5e48b3a43b001390e2b58820389d,6650527444dadc63d84aa939d14ecba4fadb2f69)`	affected	code_commit	—
`6b06d6282100dd5aacf7d45443d651a1995bd9c4`	affected	code_commit	—
`334ed22054b2ec8477e4409e214fc139cf937ef6`	affected	code_commit	—
`[2.6.27.23,2.6.28)`	affected	semver	—
`[2.6.29.3,2.6.30)`	affected	semver	—

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`2.6.30`	affected	semver	—
`[0,2.6.30)`	unaffected	semver	—
`[5.10.261,5.11.0)`	unaffected	semver	—
`[5.15.212,5.16.0)`	unaffected	semver	—
`[6.1.178,6.2.0)`	unaffected	semver	—
`[6.6.145,6.7.0)`	unaffected	semver	—
`[6.12.97,6.13.0)`	unaffected	semver	—
`[6.18.40,6.19.0)`	unaffected	semver	—
`[7.1.4,7.2.0)`	unaffected	semver	—
`[7.2-rc1,*]`	unaffected	generic	—

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Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
Debian DLA	DLA-4717-1	linux security update
Debian DSA	DSA-6405-1	linux security update

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00177.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/4bfe8c481846cee52473a2f7d7b30ee8e6749fc4
https://git.kernel.org/stable/c/6650527444dadc63d84aa939d14ecba4fadb2f69
https://git.kernel.org/stable/c/7456ae990a9738962b33146916fabca62ae3d4e0
https://git.kernel.org/stable/c/ae1e630bcaac739f625822078edbaea98366930d
https://git.kernel.org/stable/c/bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9
https://git.kernel.org/stable/c/c1cfd63326f5d09999134e9052c353faf738286e
https://git.kernel.org/stable/c/d54f14655fd7d7b293698a8b6918563c4c0465e7
https://git.kernel.org/stable/c/f9b4b03ccc9c69bf7f7298d4559906ebea7143b3
https://lore.kernel.org/linux-cve-announce/2026072523-CVE-2026-64371-d1c5@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-64371
https://www.cve.org/CVERecord?id=CVE-2026-64371

History

Wed, 05 Aug 2026 03:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-362 CWE-640

Wed, 05 Aug 2026 01:00:00 +0000

Type	Values Removed	Values Added
Weaknesses	CWE-362

Mon, 03 Aug 2026 12:15:00 +0000

Type	Values Removed	Values Added
References		https://lore.kernel.org/linux-cve-announce/2026072523-CVE-2026-64371-d1c5@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2026-64371 https://www.cve.org/CVERecord?id=CVE-2026-64371
Metrics	threat_severity `None`	cvssV3_1 `{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}` threat_severity `Moderate`

Sat, 01 Aug 2026 02:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-362

Sat, 25 Jul 2026 09:30:00 +0000

Type	Values Removed	Values 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
Title		proc: protect ptrace_may_access() with exec_update_lock (part 1)
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/4bfe8c481846cee52473a2f7d7b30ee8e6749fc4 https://git.kernel.org/stable/c/6650527444dadc63d84aa939d14ecba4fadb2f69 https://git.kernel.org/stable/c/7456ae990a9738962b33146916fabca62ae3d4e0 https://git.kernel.org/stable/c/ae1e630bcaac739f625822078edbaea98366930d https://git.kernel.org/stable/c/bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9 https://git.kernel.org/stable/c/c1cfd63326f5d09999134e9052c353faf738286e https://git.kernel.org/stable/c/d54f14655fd7d7b293698a8b6918563c4c0465e7 https://git.kernel.org/stable/c/f9b4b03ccc9c69bf7f7298d4559906ebea7143b3

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-07-25T08:50:23.981Z

Updated: 2026-07-25T08:50:23.981Z

Reserved: 2026-07-19T15:36:31.783Z

Link: CVE-2026-64371

Vulnrichment

No data.

NVD

No data.

Redhat

Severity : Moderate

Publid Date: 2026-07-25T00:00:00Z

Links: CVE-2026-64371 - Bugzilla

OpenCVE Enrichment

Updated: 2026-08-05T03:15:05Z

Weaknesses

Tracking

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Subscriptions

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