Answer in brief
CVE-2026-53235 records a High severity (CVSS 7.5) vulnerability in net: add pskb_may_pull() to skb_gro_receive_list(). 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 7.5. 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 | >=8d95dc474f85481652a0e422d2f1f079de81f63c <9e636c995b7beeb74ea882968248752821c244c4 || >=8d95dc474f85481652a0e422d2f1f079de81f63c <0cde3a004119db637b401c54e77536e4145fc0b4 || >=8d95dc474f85481652a0e422d2f1f079de81f63c <848571dcbbbea7ba44dd4f7ebe1fbb274afe08ac || >=8d95dc474f85481652a0e422d2f1f079de81f63c <f2bb3434544454099a5b6dec213567267b05d79d | 9e636c995b7beeb74ea882968248752821c244c4, 0cde3a004119db637b401c54e77536e4145fc0b4, 848571dcbbbea7ba44dd4f7ebe1fbb274afe08ac, f2bb3434544454099a5b6dec213567267b05d79d |
| Linux/Linuxgeneric | 6.10 | 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: add pskb_may_pull() to skb_gro_receive_list() skb_gro_receive_list() calls skb_pull(skb, skb_gro_offset(skb)) without first ensuring the data is in the linear area via pskb_may_pull(). When the skb arrives via napi_gro_frags(), skb_headlen can be 0 (all data in page fragments) while skb_gro_offset is non-zero (after IP+TCP header parsing). The skb_pull() then decrements skb->len by skb_gro_offset but skb->data_len stays unchanged, hitting BUG_ON(skb->len < skb->data_len) in __skb_pull(). The UDP fraglist GRO path already contains this guard at udp_offload.c:749. Adding it to skb_gro_receive_list() itself provides centralized protection for all callers (TCP, UDP, and any future protocols), and ensures the precondition of skb_pull() is satisfied before it is called. On pskb_may_pull() failure, set NAPI_GRO_CB(skb)->flush = 1 so the skb is not held as a new GRO head and is instead delivered through the normal receive path, matching the UDP handling.
Quoted source text, attributed separately from HOL analysis.