Answer in brief
CVE-2026-80929 records a High severity (CVSS 7.8) vulnerability in sysctl: move the "cad_pid" entry from pid_table[] to kern_reboot_table[]. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). 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 7.8. 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=e054bcbe7e7af2baad3752f1a4916a7fffc0457e <e8527de7fea191fda704792a56081f9009aeec37 || >=e054bcbe7e7af2baad3752f1a4916a7fffc0457e <a09bc4eaa67e1a72df3b6d0beb3afeef1e1fdfcd || >=e054bcbe7e7af2baad3752f1a4916a7fffc0457e <7170ca01623b399c97f2ae9d3e228badc1f25ea3 | e8527de7fea191fda704792a56081f9009aeec37, a09bc4eaa67e1a72df3b6d0beb3afeef1e1fdfcd, 7170ca01623b399c97f2ae9d3e228badc1f25ea3 |
| Linux/Linuxgeneric | 6.17 | Not reported |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
In the Linux kernel, the following vulnerability has been resolved: sysctl: move the "cad_pid" entry from pid_table[] to kern_reboot_table[] cad_pid is global, and kill_cad_pid() is only used in the root namespace. However, due to pid_table_root_permissions(), a non-root user can unshare pid/user namespaces and modify it from the child namespace. This makes no sense and is simply wrong. Move it to kern_reboot_table[] where it logically belongs; this ensures that only GLOBAL_ROOT_UID can read/modify this sysctl. Note that this patch doesn't preserve "#ifdef CONFIG_PROC_SYSCTL" around the "cad_pid"; CONFIG_PROC_SYSCTL selects CONFIG_SYSCTL, so it is always set when kern_reboot_table[] is compiled.
Quoted source text, attributed separately from HOL analysis.