Answer in brief
CVE-2026-64371 records a Medium severity (CVSS 5.5) vulnerability in proc: protect ptrace_may_access() with exec_update_lock (part 1). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:2.6.30:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:2.6.30:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:2.6.30:rc6:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:2.6.30:rc7:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:2.6.30:rc8:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=f83ce3e6b02d5e48b3a43b001390e2b58820389d <ae1e630bcaac739f625822078edbaea98366930d || >=f83ce3e6b02d5e48b3a43b001390e2b58820389d <d54f14655fd7d7b293698a8b6918563c4c0465e7 || >=f83ce3e6b02d5e48b3a43b001390e2b58820389d <bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9 || >=f83ce3e6b02d5e48b3a43b001390e2b58820389d <7456ae990a9738962b33146916fabca62ae3d4e0 || >=f83ce3e6b02d5e48b3a43b001390e2b58820389d <4bfe8c481846cee52473a2f7d7b30ee8e6749fc4 || >=f83ce3e6b02d5e48b3a43b001390e2b58820389d <f9b4b03ccc9c69bf7f7298d4559906ebea7143b3 || >=f83ce3e6b02d5e48b3a43b001390e2b58820389d <c1cfd63326f5d09999134e9052c353faf738286e || >=f83ce3e6b02d5e48b3a43b001390e2b58820389d <6650527444dadc63d84aa939d14ecba4fadb2f69 || 6b06d6282100dd5aacf7d45443d651a1995bd9c4 || 334ed22054b2ec8477e4409e214fc139cf937ef6 || >=2.6.27.23 <2.6.28 || >=2.6.29.3 <2.6.30 | ae1e630bcaac739f625822078edbaea98366930d, d54f14655fd7d7b293698a8b6918563c4c0465e7, bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9, 7456ae990a9738962b33146916fabca62ae3d4e0, 4bfe8c481846cee52473a2f7d7b30ee8e6749fc4, f9b4b03ccc9c69bf7f7298d4559906ebea7143b3, c1cfd63326f5d09999134e9052c353faf738286e, 6650527444dadc63d84aa939d14ecba4fadb2f69, 2.6.28, 2.6.30 |
| Linux/Linuxgeneric | 2.6.30 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 11, 2026
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
Quoted source text, attributed separately from HOL analysis.