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CVE-2026-98233

Unknown

Last modified

CVE-2026-98233 is a vulnerability of currently unknown severity. 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.

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 61fad6816fc10fb8793a925d5c1256d1c3db0cd2, < bb10a0084c03a94364aeec542beddc5d49b59f59; >= 61fad6816fc10fb8793a925d5c1256d1c3db0cd2, < b8c0cb3069058c2d67b5c7c833b2833381ecffdc; >= 61fad6816fc10fb8793a925d5c1256d1c3db0cd2, < 2daa618e7ff19eefcbda281bc4c5998c4140f9cf; >= 61fad6816fc10fb8793a925d5c1256d1c3db0cd2, < 23cd30498891d29a69ec9b75bd92f8a0f21f1342; >= 61fad6816fc10fb8793a925d5c1256d1c3db0cd2, < 49a48a5aaf85fe69d2dc3fb334b4854fadf44e39; >= 61fad6816fc10fb8793a925d5c1256d1c3db0cd2, < 805edbdcb8681da5f7ee43b3c3c809f7a8c31208; >= 61fad6816fc10fb8793a925d5c1256d1c3db0cd2, < 693209a237fc548791cf402441db8b68d1da7d38; >= 61fad6816fc10fb8793a925d5c1256d1c3db0cd2, < 33ff111d7ba3beb86e28938d6382bb5beabd865a; 2975472e042e0bbfeeabddc5023cb8c011ec5a07; 6fb0e4385928900ccb8697748555b3f54bba5193; 86137342fd4cf52882842aa8d1318b2661f08e8a; b06e4d3ed4044c2facf10a511d809f9aa29d960e; >= 4.14.175, < 4.15; >= 4.19.114, < 4.20; >= 5.4.29, < 5.5; >= 5.5.14, < 5.6
LinuxLinux5.6

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98233?
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.
How severe is CVE-2026-98233?
Severity scoring for CVE-2026-98233 is pending analysis.
How do I fix CVE-2026-98233?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST