CVE-2026-23377
Description
A flaw was found in the Linux kernel, specifically within the ice network driver and the eXpress Data Path (XDP) component. This vulnerability arises from an incorrect calculation of the frag_size in XDP receive queue information, which can lead to an invalid memory state known as "negative tailroom." A local user can exploit this by manipulating packet sizes and offsets during XDP operations. Successful exploitation can trigger a kernel panic, resulting in a Denial of Service (DoS) for the affected system.
Statement
This flaw affects systems with Intel ice network adapters using XDP (eXpress Data Path). The incorrect frag_size calculation (DMA write size vs. buffer truesize) causes bpf_xdp_frags_increase_tail() to compute negative tailroom, leading to memory corruption or kernel panic. Triggerable via XDP_ADJUST_TAIL with specific packet sizes. Requires XDP program loading privileges.
Mitigation
To mitigate this issue, prevent the ice module from being loaded. See https://access.redhat.com/solutions/41278 for instructions.
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).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | 5.5 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Integrity,Availability,Confidentiality
Technical Impact: DoS: Crash, Exit, or Restart; Execute Unauthorized Code or Commands; Read Memory; Modify Memory
If the incorrect calculation is used in the context of memory allocation, then the software may create a buffer that is smaller or larger than expected. If the allocated buffer is smaller than expected, this could lead to an out-of-bounds read or write (CWE-119), possibly causing a crash, allowing arbitrary code execution, or exposing sensitive data.
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