In the Linux kernel, the following vulnerability has been resolved: virtio_net: Fix resize of the RX ring When a AF_XDP socket is attached, the… (CVE-2026-90142)
A vulnerability in the Linux kernel's virtio_net driver related to resizing the RX ring when an AF_XDP socket is attached has been resolved. The issue occurs because the virtnet_rx_resize function does not properly resize the XSK buffer array, leading to a potential write past the end of the array during virtnet_rx_resume. This can be triggered by resizing the RX ring with ethtool while an AF_XDP socket is active.
AI Analysis
Technical Summary
The Linux kernel's virtio_net driver had a vulnerability (CVE-2026-90142) where the virtnet_rx_resize function failed to resize the rq->xsk_buffs XSK buffer array when an AF_XDP socket was attached. This caused virtnet_rx_resume to write beyond the bounds of the array if the RX ring size was increased, potentially leading to memory corruption. The issue is reproducible by resizing the RX ring using ethtool while an AF_XDP socket is in use.
Potential Impact
This vulnerability can lead to out-of-bounds memory writes, which may cause system instability, crashes, or potentially allow an attacker with local privileges to escalate their privileges or cause denial of service. The CVSS score of 7.8 indicates a high severity with high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel. Users should apply the official kernel updates that address this issue. Since this is a kernel-level vulnerability, upgrading to the patched kernel version is the recommended remediation. No additional mitigations are specified.
In the Linux kernel, the following vulnerability has been resolved: virtio_net: Fix resize of the RX ring When a AF_XDP socket is attached, the… (CVE-2026-90142)
Description
A vulnerability in the Linux kernel's virtio_net driver related to resizing the RX ring when an AF_XDP socket is attached has been resolved. The issue occurs because the virtnet_rx_resize function does not properly resize the XSK buffer array, leading to a potential write past the end of the array during virtnet_rx_resume. This can be triggered by resizing the RX ring with ethtool while an AF_XDP socket is active.
CVSS v3.1
Score 7.8high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel's virtio_net driver had a vulnerability (CVE-2026-90142) where the virtnet_rx_resize function failed to resize the rq->xsk_buffs XSK buffer array when an AF_XDP socket was attached. This caused virtnet_rx_resume to write beyond the bounds of the array if the RX ring size was increased, potentially leading to memory corruption. The issue is reproducible by resizing the RX ring using ethtool while an AF_XDP socket is in use.
Potential Impact
This vulnerability can lead to out-of-bounds memory writes, which may cause system instability, crashes, or potentially allow an attacker with local privileges to escalate their privileges or cause denial of service. The CVSS score of 7.8 indicates a high severity with high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel. Users should apply the official kernel updates that address this issue. Since this is a kernel-level vulnerability, upgrading to the patched kernel version is the recommended remediation. No additional mitigations are specified.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-2rwj-7pmr-4q35
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-90142"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6aade52755bf5e2cf5edc1c0
Added to database: 09/19/2026, 01:28:07 UTC
Last enriched: 09/19/2026, 01:54:12 UTC
Last updated: 09/19/2026, 02:21:29 UTC
Views: 2
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