CVE-2026-53235
- Source
- https://cve.org/CVERecord?id=CVE-2026-53235
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53235.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-53235
- Downstream
- Related
- Published
- 2026-06-25T08:39:32Z
- Modified
- 2026-08-27T18:26:20Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- net: add pskb_may_pull() to skb_gro_receive_list()
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53235.json" }- References
-
- https://git.kernel.org/stable/c/0cde3a004119db637b401c54e77536e4145fc0b4
- https://git.kernel.org/stable/c/848571dcbbbea7ba44dd4f7ebe1fbb274afe08ac
- https://git.kernel.org/stable/c/9e636c995b7beeb74ea882968248752821c244c4
- https://git.kernel.org/stable/c/f2bb3434544454099a5b6dec213567267b05d79d
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53235.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-53235
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced8d95dc474f85481652a0e422d2f1f079de81f63cFixed9e636c995b7beeb74ea882968248752821c244c4Fixed0cde3a004119db637b401c54e77536e4145fc0b4Fixed848571dcbbbea7ba44dd4f7ebe1fbb274afe08acFixedf2bb3434544454099a5b6dec213567267b05d79d