CVE-2026-98233: Linux kernel · net/packet: clear RX owner on VNET header error
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 28 Oct 2026, 01:27 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 6 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
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
- ubuntu.com/security/CVE-2026-98233 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98233 (opens in a new tab)
- git.kernel.org/linus/33ff111d7ba3beb86e28938d6382bb5beabd865a (opens in a new tab)
- git.kernel.org/stable/c/23cd30498891d29a69ec9b75bd92f8a0f21f1342 (opens in a new tab)
- git.kernel.org/stable/c/2daa618e7ff19eefcbda281bc4c5998c4140f9cf (opens in a new tab)
- git.kernel.org/stable/c/33ff111d7ba3beb86e28938d6382bb5beabd865a (opens in a new tab)
- git.kernel.org/stable/c/49a48a5aaf85fe69d2dc3fb334b4854fadf44e39 (opens in a new tab)
- git.kernel.org/stable/c/693209a237fc548791cf402441db8b68d1da7d38 (opens in a new tab)
- git.kernel.org/stable/c/805edbdcb8681da5f7ee43b3c3c809f7a8c31208 (opens in a new tab)
- git.kernel.org/stable/c/b8c0cb3069058c2d67b5c7c833b2833381ecffdc (opens in a new tab)
- git.kernel.org/stable/c/bb10a0084c03a94364aeec542beddc5d49b59f59 (opens in a new tab)