CVE Catalog

CVE-2026-98233

Low risk· EPSS 7%
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.18%

7th percentile - higher than 7% of all known CVEs

Summary

In the Linux kernel net/packet subsystem, tpacket_rcv() claims a V1 or V2 ring slot before converting the virtio-net header. If the conversion fails, the drop path leaves the slot claimed; with a one-frame TPACKET_V2 ring, an unsupported UDP GSO packet leaves the only slot unavailable and the ring also drops the next valid packet.

Risk Assessment

This can cause loss of valid packets and disrupt applications using TPACKET_V2 rings, resulting in a denial of service (DoS).

Recommendation

Update the Linux kernel to a version containing the fix that clears the ownership bit on this error path.

Related vulnerabilities

Original NVD description (English source)

In the Linux kernel, the following vulnerability has been resolved: net/packet: clear RX owner on VNET header error Commit 61fad6816fc1 ("net/packet: tpacket_rcv: avoid a producer race condition") added rx_owner_map and made tpacket_rcv() claim a V1 or V2 ring slot before converting the virtio-net header. If the conversion fails, the drop path leaves the slot claimed. With a one-frame TPACKET_V2 ring, an unsupported UDP GSO packet leaves the only slot unavailable, so the ring also drops the next valid packet. Clear the ownership bit on this error path. TPACKET_V3 already clears its block state here.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS