CVE-2026-98233

Description

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.

References

• https://git.kernel.org/stable/c/23cd30498891d29a69ec9b75bd92f8a0f21f1342
• https://git.kernel.org/stable/c/2daa618e7ff19eefcbda281bc4c5998c4140f9cf
• https://git.kernel.org/stable/c/33ff111d7ba3beb86e28938d6382bb5beabd865a
• https://git.kernel.org/stable/c/49a48a5aaf85fe69d2dc3fb334b4854fadf44e39
• https://git.kernel.org/stable/c/693209a237fc548791cf402441db8b68d1da7d38