CVE-2026-98320high

CVE-2026-98320: high-severity vulnerability in Linux

netfilter: flowtable: hold reference on ct until flow is released

Published · Updated

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.8epss 0.1%
exploitation probability
0.1%top 97% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: hold reference on ct until flow is released nf_ct_put() releases the ct->ext area inmediately, the rcu typesafe semantics also allow to refer to the wrong conntrack from the flowtable datapath. Hold reference on ct until flow is released after rcu grace period. Add rcu_barrier() on module exit path, to ensure pending flow entries are release before module goes away.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · Linux
Related CVEs — Linux

In the same product, most dangerous first.

CVE-2024-53197HIGHALSA: usb-audio: Fix potential out-of-bound accesses for Extigy and Mbox devicesEPSS 4.1%KEVCVE-2026-31431HIGHcrypto: algif_aead - Revert to operating out-of-placeEPSS 3.4%KEVCVE-2024-53104HIGHmedia: uvcvideo: Skip parsing frames of type UVC_VS_UNDEFINED in uvc_parse_formatEPSS 3.4%KEVCVE-2025-39682CRITICALtls: fix handling of zero-length records on the rx_listEPSS 2.9%KEVCVE-2024-36971HIGHnet: fix __dst_negative_advice() raceEPSS 2.7%KEVCVE-2024-53150HIGHALSA: usb-audio: Fix out of bounds reads when finding clock sourcesEPSS 1.4%KEV
References
https://git.kernel.org/stable/c/12c1ac230f4ca16e0017b62a963ab75e0b48074fhttps://git.kernel.org/stable/c/61c6688be282277c6e91ab286a7acd0ae8681ac6https://git.kernel.org/stable/c/8274cdc5f9c57e17ed77fc4ba76212536c840f25https://git.kernel.org/stable/c/93ff1594be1aad4da364462dd8db050ebcfda2dehttps://git.kernel.org/stable/c/a43cd2b67b91e943273c913237a7a88c50cdcfbchttps://git.kernel.org/stable/c/d9e6175a3ee48209ee65f294fc567b4e16b29b74https://git.kernel.org/stable/c/e75a9fa1d44bcbd66ea02e8781bcca6ea4076e0dhttps://git.kernel.org/stable/c/eed6997e8dc40593a539fcc722e7ed51b18db86c