Answer in brief
CVE-2026-43178 records a High severity (CVSS 7.8) vulnerability in procfs: fix possible double mmput() in do_procmap_query(). 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 | >=b9b97e6aeb534315f9646b2090d1a5024c6a4e82 <f9fe092084cd04deea18747f58a2304026e76aaa || >=cbc03ce3e6ce7e21214c3f02218213574c1a2d08 <8adaff87db143583e08eec4f4e7788f1ef8af94d || >=b5cbacd7f86f4f62b8813688c8e73be94e8e1951 <90f5e87c9b75833b9ef3a4415b92c0247f28ab2f || >=b5cbacd7f86f4f62b8813688c8e73be94e8e1951 <61dc9f776705d6db6847c101b98fa4f0e9eb6fa3 || >=6.12.70 <6.12.75 || >=6.18.10 <6.18.16 | f9fe092084cd04deea18747f58a2304026e76aaa, 8adaff87db143583e08eec4f4e7788f1ef8af94d, 90f5e87c9b75833b9ef3a4415b92c0247f28ab2f, 61dc9f776705d6db6847c101b98fa4f0e9eb6fa3, 6.12.75, 6.18.16 |
| Linux/Linuxgeneric | 6.19 | Not reported |
Published upstream
May 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 15, 2026
In the Linux kernel, the following vulnerability has been resolved: procfs: fix possible double mmput() in do_procmap_query() When user provides incorrectly sized buffer for build ID for PROCMAP_QUERY we return with -ENAMETOOLONG error. After recent changes this condition happens later, after we unlocked mmap_lock/per-VMA lock and did mmput(), so original goto out is now wrong and will double-mmput() mm_struct. Fix by jumping further to clean up only vm_file and name_buf.
Quoted source text, attributed separately from HOL analysis.