Answer in brief
CVE-2025-21763 records a Unknown severity vulnerability in neighbour: use RCU protection in __neigh_notify(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2025-21763 records a Unknown severity vulnerability in neighbour: use RCU protection in __neigh_notify(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (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), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=426b5303eb435d98b9bee37a807be386bc2b3320 <e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32 || >=426b5303eb435d98b9bee37a807be386bc2b3320 <8666e9aab801328c1408a19fbf4070609dc0695a || >=426b5303eb435d98b9bee37a807be386bc2b3320 <40d8f2f2a373b6c294ffac394d2bb814b572ead1 || >=426b5303eb435d98b9bee37a807be386bc2b3320 <784eb2376270e086f7db136d154b8404edacf97b || >=426b5303eb435d98b9bee37a807be386bc2b3320 <1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379 || >=426b5303eb435d98b9bee37a807be386bc2b3320 <cdd5c2a12ddad8a77ce1838ff9f29aa587de82df || >=426b5303eb435d98b9bee37a807be386bc2b3320 <559307d25235e24b5424778c7332451b6c741159 || >=426b5303eb435d98b9bee37a807be386bc2b3320 <becbd5850c03ed33b232083dd66c6e38c0c0e569 | e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32, 8666e9aab801328c1408a19fbf4070609dc0695a, 40d8f2f2a373b6c294ffac394d2bb814b572ead1, 784eb2376270e086f7db136d154b8404edacf97b, 1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379, cdd5c2a12ddad8a77ce1838ff9f29aa587de82df, 559307d25235e24b5424778c7332451b6c741159, becbd5850c03ed33b232083dd66c6e38c0c0e569 |
| Linux/Linuxgeneric | 2.6.25 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Feb 27, 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: neighbour: use RCU protection in __neigh_notify() __neigh_notify() can be called without RTNL or RCU protection. Use RCU protection to avoid potential UAF.
Quoted source text, attributed separately from HOL analysis.
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), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=426b5303eb435d98b9bee37a807be386bc2b3320 <e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32 || >=426b5303eb435d98b9bee37a807be386bc2b3320 <8666e9aab801328c1408a19fbf4070609dc0695a || >=426b5303eb435d98b9bee37a807be386bc2b3320 <40d8f2f2a373b6c294ffac394d2bb814b572ead1 || >=426b5303eb435d98b9bee37a807be386bc2b3320 <784eb2376270e086f7db136d154b8404edacf97b || >=426b5303eb435d98b9bee37a807be386bc2b3320 <1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379 || >=426b5303eb435d98b9bee37a807be386bc2b3320 <cdd5c2a12ddad8a77ce1838ff9f29aa587de82df || >=426b5303eb435d98b9bee37a807be386bc2b3320 <559307d25235e24b5424778c7332451b6c741159 || >=426b5303eb435d98b9bee37a807be386bc2b3320 <becbd5850c03ed33b232083dd66c6e38c0c0e569 | e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32, 8666e9aab801328c1408a19fbf4070609dc0695a, 40d8f2f2a373b6c294ffac394d2bb814b572ead1, 784eb2376270e086f7db136d154b8404edacf97b, 1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379, cdd5c2a12ddad8a77ce1838ff9f29aa587de82df, 559307d25235e24b5424778c7332451b6c741159, becbd5850c03ed33b232083dd66c6e38c0c0e569 |
| Linux/Linuxgeneric | 2.6.25 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Feb 27, 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: neighbour: use RCU protection in __neigh_notify() __neigh_notify() can be called without RTNL or RCU protection. Use RCU protection to avoid potential UAF.
Quoted source text, attributed separately from HOL analysis.