CVE-2026-53235 Details
Description
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.
A vulnerability exists in the Linux kernel's handling of packet segmentation in the Generic Receive Offload (GRO) process. The issue arises in the skb_gro_receive_list() function, which processes received packets. The function calls skb_pull() to adjust the packet's length based on the GRO offset without first verifying that the data is in the linear area. This oversight can lead to a situation where the packet's length is incorrectly managed, causing a kernel bug check. The vulnerability affects the Linux kernel stable tree and has been addressed by adding a proper data validation step before manipulating packet lengths, ensuring that all protocols, including TCP and UDP, are safeguarded.
Users can upgrade to the latest version of the Linux kernel stable tree, where this vulnerability has been fixed. Instructions for downloading the patched version are available in the Linux kernel repository.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/0cde3a004119db637b401c54e77536e4145fc0b4 | kernel.org | Patch |
| https://git.kernel.org/stable/c/848571dcbbbea7ba44dd4f7ebe1fbb274afe08ac | kernel.org | Patch |
| https://git.kernel.org/stable/c/9e636c995b7beeb74ea882968248752821c244c4 | kernel.org | Patch |
| https://git.kernel.org/stable/c/f2bb3434544454099a5b6dec213567267b05d79d | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.10, < 6.12.94 >= 6.13, < 6.18.36 >= 6.19, < 7.0.13 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 7.1 rc5 7.1 rc6 7.1 rc7 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 8, 2026 | Initial Analysis | [email protected] |
| Jun 28, 2026 | CVE Modified | kernel.org |
| Jun 25, 2026 | New CVE Received | kernel.org |