proc: protect ptrace_may_access() with exec_update_lock (part 1)
Priority LOW 24Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 5 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
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
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00129 2nd percentileScored 2026-11-07
Fix Partial Linux (Linux): 2.6.28, 2.6.30, 5.10.261 +7Red Hat: 5 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.27.23 to before 2.6.28; 2.6.29.3 to before 2.6.30 | 2.6.28, 2.6.30 | Patch available | CNA |
| Linux | Linux | 2.6.30 and later | 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.4, 7.2 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.27.23 to before 2.6.28; 2.6.29.3 to before 2.6.30 Fixed in 2.6.28, 2.6.30 Patch available CNA
- Linux VendorLinux Affected 2.6.30 and later Fixed in 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.4, 7.2 Patch available CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 2.6.27.23 to before 2.6.28; 2.6.29.3 to before 2.6.30; 2.6.30.1 to before 5.10.261; 5.11 to before 5.15.212; 5.16 to before 6.1.178; 6.2 to before 6.6.145; 6.7 to before 6.12.97; 6.13 to before 6.18.40; 6.19 to before 7.1.4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.30:-:*:*:*:*:*:* | 2.6.30 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.30:rc5:*:*:*:*:*:* | 2.6.30 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.30:rc6:*:*:*:*:*:* | 2.6.30 rc6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.30:rc7:*:*:*:*:*:* | 2.6.30 rc7 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.30:rc8:*:*:*:*:*:* | 2.6.30 rc8 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.27.23 to before 2.6.28; 2.6.29.3 to before 2.6.30; 2.6.30.1 to before 5.10.261; 5.11 to before 5.15.212; 5.16 to before 6.1.178; 6.2 to before 6.6.145; 6.7 to before 6.12.97; 6.13 to before 6.18.40; 6.19 to before 7.1.4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.30:-:*:*:*:*:*:* Versions 2.6.30 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.30:rc5:*:*:*:*:*:* Versions 2.6.30 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.30:rc6:*:*:*:*:*:* Versions 2.6.30 rc6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.30:rc7:*:*:*:*:*:* Versions 2.6.30 rc7 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.30:rc8:*:*:*:*:*:* Versions 2.6.30 rc8 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 2.6.28, 2.6.30
- Fix · CNA Linux (Linux) Fixed in 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.4, 7.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet |
| Red Hat Enterprise Linux 8 | Affected | No fix yet |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-64371
- 2026-10-03 Alias added: GHSA-mx48-2qjx-49h9
- 2026-11-06 CISA SSVC decision points changed
References
Patch 8
- https://git.kernel.org/stable/c/ae1e630bcaac739f625822078edbaea98366930d
- https://git.kernel.org/stable/c/d54f14655fd7d7b293698a8b6918563c4c0465e7
- https://git.kernel.org/stable/c/bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9
- https://git.kernel.org/stable/c/7456ae990a9738962b33146916fabca62ae3d4e0
- https://git.kernel.org/stable/c/4bfe8c481846cee52473a2f7d7b30ee8e6749fc4
- https://git.kernel.org/stable/c/f9b4b03ccc9c69bf7f7298d4559906ebea7143b3
- https://git.kernel.org/stable/c/c1cfd63326f5d09999134e9052c353faf738286e
- https://git.kernel.org/stable/c/6650527444dadc63d84aa939d14ecba4fadb2f69
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2026-64371 · CVE Program
- CVE-2026-64371 · NVD
- FIRST EPSS
- GHSA-mx48-2qjx-49h9 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-64371 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences