Answer in brief
CVE-2025-39963 records a Unknown severity vulnerability in io_uring: fix incorrect io_kiocb reference in io_link_skb. 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.
A CVSS score is not reported in the current record. 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 | >=6fe4220912d19152a26ce19713ab232f4263018d <a89c34babc2e5834aa0905278f26f4dbe4b26b76 || >=6fe4220912d19152a26ce19713ab232f4263018d <50a98ce1ea694f1ff8e87bc2f8f84096d1736f6a || >=6fe4220912d19152a26ce19713ab232f4263018d <2c139a47eff8de24e3350dadb4c9d5e3426db826 | a89c34babc2e5834aa0905278f26f4dbe4b26b76, 50a98ce1ea694f1ff8e87bc2f8f84096d1736f6a, 2c139a47eff8de24e3350dadb4c9d5e3426db826 |
| Linux/Linuxgeneric | 6.10 | Not reported |
Published upstream
Oct 9, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 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: io_uring: fix incorrect io_kiocb reference in io_link_skb In io_link_skb function, there is a bug where prev_notif is incorrectly assigned using 'nd' instead of 'prev_nd'. This causes the context validation check to compare the current notification with itself instead of comparing it with the previous notification. Fix by using the correct prev_nd parameter when obtaining prev_notif.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2025-39963 records a Unknown severity vulnerability in io_uring: fix incorrect io_kiocb reference in io_link_skb. 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.
A CVSS score is not reported in the current record. 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 | >=6fe4220912d19152a26ce19713ab232f4263018d <a89c34babc2e5834aa0905278f26f4dbe4b26b76 || >=6fe4220912d19152a26ce19713ab232f4263018d <50a98ce1ea694f1ff8e87bc2f8f84096d1736f6a || >=6fe4220912d19152a26ce19713ab232f4263018d <2c139a47eff8de24e3350dadb4c9d5e3426db826 | a89c34babc2e5834aa0905278f26f4dbe4b26b76, 50a98ce1ea694f1ff8e87bc2f8f84096d1736f6a, 2c139a47eff8de24e3350dadb4c9d5e3426db826 |
| Linux/Linuxgeneric | 6.10 | Not reported |
Published upstream
Oct 9, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 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: io_uring: fix incorrect io_kiocb reference in io_link_skb In io_link_skb function, there is a bug where prev_notif is incorrectly assigned using 'nd' instead of 'prev_nd'. This causes the context validation check to compare the current notification with itself instead of comparing it with the previous notification. Fix by using the correct prev_nd parameter when obtaining prev_notif.
Quoted source text, attributed separately from HOL analysis.