CVE-2026-53235
Description
A flaw was found in the Linux kernel's network Generic Receive Offload (GRO) handling. An attacker sending specially crafted network packets could trigger a bug in the skb_gro_receive_list() function. This occurs when the system attempts to process network data that is not in the expected linear memory area, leading to an incorrect buffer length calculation. The flaw can cause a system crash, resulting in a Denial of Service (DoS).
Statement
This vulnerability is rated as Moderate impact because an attacker can trigger a kernel panic resulting in a denial of service, but cannot compromise system confidentiality or integrity. Older enterprise releases including Red Hat Enterprise Linux 8 and 9 do not contain the affected networking logic and remain unaffected. On impacted systems, exploitation requires specific fragmented network traffic that causes an assertion failure during generic receive offload aggregation.
Mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.5 | N/A | 7.5 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | None |
| Integrity Impact | None | N/A | None |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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