Answer in brief
CVE-2026-53247 records a Critical severity (CVSS 9.8) vulnerability in net: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown. 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 9.8. 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 | >=2d7605a729062bb554f03c5983d8cfb8c0b42e9c <72775977e89c25c99ee84d2c5baa3f86a8ba5cb4 || >=2d7605a729062bb554f03c5983d8cfb8c0b42e9c <459c6f35c58cf0fd5247e55d73ddaa29571d9b7e || >=2d7605a729062bb554f03c5983d8cfb8c0b42e9c <e634408d2b0cd939cfe019398a21fb47b7a8ffe3 || >=2d7605a729062bb554f03c5983d8cfb8c0b42e9c <2d86aeb46d5f69c704065a8c69822582787272a1 || >=2d7605a729062bb554f03c5983d8cfb8c0b42e9c <80df409e1a483676826a6c66e693dba6ac507751 | 72775977e89c25c99ee84d2c5baa3f86a8ba5cb4, 459c6f35c58cf0fd5247e55d73ddaa29571d9b7e, e634408d2b0cd939cfe019398a21fb47b7a8ffe3, 2d86aeb46d5f69c704065a8c69822582787272a1, 80df409e1a483676826a6c66e693dba6ac507751 |
| Linux/Linuxgeneric | 6.2 | Not reported |
Published upstream
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
In the Linux kernel, the following vulnerability has been resolved: net: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown mtk_free_dev() calls metadata_dst_free() which frees the metadata_dst with kfree() immediately, bypassing the RCU grace period. In the RX path, skb_dst_set_noref() sets a non-refcounted pointer from the skb to the metadata_dst. This function requires RCU read-side protection and the dst must remain valid until all RCU readers complete. Since metadata_dst_free() calls kfree() directly, a use-after-free can occur if any skb still holds a noref pointer to the dst when the driver tears it down. Replace metadata_dst_free() with dst_release() which properly goes through the refcount path: when the refcount drops to zero, it schedules the actual free via call_rcu_hurry(), ensuring all RCU readers have completed before the memory is freed.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-53247 records a Critical severity (CVSS 9.8) vulnerability in net: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown. 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 9.8. 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 | >=2d7605a729062bb554f03c5983d8cfb8c0b42e9c <72775977e89c25c99ee84d2c5baa3f86a8ba5cb4 || >=2d7605a729062bb554f03c5983d8cfb8c0b42e9c <459c6f35c58cf0fd5247e55d73ddaa29571d9b7e || >=2d7605a729062bb554f03c5983d8cfb8c0b42e9c <e634408d2b0cd939cfe019398a21fb47b7a8ffe3 || >=2d7605a729062bb554f03c5983d8cfb8c0b42e9c <2d86aeb46d5f69c704065a8c69822582787272a1 || >=2d7605a729062bb554f03c5983d8cfb8c0b42e9c <80df409e1a483676826a6c66e693dba6ac507751 | 72775977e89c25c99ee84d2c5baa3f86a8ba5cb4, 459c6f35c58cf0fd5247e55d73ddaa29571d9b7e, e634408d2b0cd939cfe019398a21fb47b7a8ffe3, 2d86aeb46d5f69c704065a8c69822582787272a1, 80df409e1a483676826a6c66e693dba6ac507751 |
| Linux/Linuxgeneric | 6.2 | Not reported |
Published upstream
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
In the Linux kernel, the following vulnerability has been resolved: net: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown mtk_free_dev() calls metadata_dst_free() which frees the metadata_dst with kfree() immediately, bypassing the RCU grace period. In the RX path, skb_dst_set_noref() sets a non-refcounted pointer from the skb to the metadata_dst. This function requires RCU read-side protection and the dst must remain valid until all RCU readers complete. Since metadata_dst_free() calls kfree() directly, a use-after-free can occur if any skb still holds a noref pointer to the dst when the driver tears it down. Replace metadata_dst_free() with dst_release() which properly goes through the refcount path: when the refcount drops to zero, it schedules the actual free via call_rcu_hurry(), ensuring all RCU readers have completed before the memory is freed.
Quoted source text, attributed separately from HOL analysis.