Answer in brief
CVE-2025-21967 records a High severity (CVSS 8.8) vulnerability in ksmbd: fix use-after-free in ksmbd_free_work_struct. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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 8.8. 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), Linux/Linux (generic). 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:6.14:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.14:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.14:rc6:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0626e6641f6b467447c81dd7678a69c66f7746cf <fb776765bfc21d5e4ed03bb3d4406c2b86ff1ac3 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <62746ae3f5414244a96293e3b017be637b641280 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <eb51f6f59d19b92f6fe84d3873f958495ab32f0a || >=0626e6641f6b467447c81dd7678a69c66f7746cf <bb39ed47065455604729404729d9116868638d31 | fb776765bfc21d5e4ed03bb3d4406c2b86ff1ac3, 62746ae3f5414244a96293e3b017be637b641280, eb51f6f59d19b92f6fe84d3873f958495ab32f0a, bb39ed47065455604729404729d9116868638d31 |
| Linux/Linuxgeneric | 5.15 | Not reported |
| Linux/Linuxgeneric | >=0626e6641f6b467447c81dd7678a69c66f7746cf <ffe0909010b21df8f948d624ad00cf14dd856721 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <fb776765bfc21d5e4ed03bb3d4406c2b86ff1ac3 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <62746ae3f5414244a96293e3b017be637b641280 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <eb51f6f59d19b92f6fe84d3873f958495ab32f0a || >=0626e6641f6b467447c81dd7678a69c66f7746cf <bb39ed47065455604729404729d9116868638d31 | ffe0909010b21df8f948d624ad00cf14dd856721, fb776765bfc21d5e4ed03bb3d4406c2b86ff1ac3, 62746ae3f5414244a96293e3b017be637b641280, eb51f6f59d19b92f6fe84d3873f958495ab32f0a, bb39ed47065455604729404729d9116868638d31 |
Published upstream
Apr 1, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in ksmbd_free_work_struct ->interim_entry of ksmbd_work could be deleted after oplock is freed. We don't need to manage it with linked list. The interim request could be immediately sent whenever a oplock break wait is needed.
Quoted source text, attributed separately from HOL analysis.