CVE-2026-89488: Linux 4.18

Affected technology

Linux · 11efd5cb04a184eea4f57b68ea63dddd463158d1 to before 239f26589a6926db28c436e14f28517581ef1385, 11efd5cb04a184eea4f57b68ea63dddd463158d1 to before 3b9369881b403f4cdbb11fa998554382bdcc3d8c, 11efd5cb04a184eea4f57b68ea63dddd463158d1 to before 3b41d907400cc1dd1da9555b81dca422b1f44433, 11efd5cb04a184eea4f57b68ea63dddd463158d1 to before 680f20d5937fa4d1367c59fe83091b78041015f5, 11efd5cb04a184eea4f57b68ea63dddd463158d1 to before bf4aaa7ea2579e24ed7de2e20578a875bebca011, 11efd5cb04a184eea4f57b68ea63dddd463158d1 to before e15407c3a8a005324f633cd46cd8fb58042c1157, 11efd5cb04a184eea4f57b68ea63dddd463158d1 to before 6a6d36fadb8537d9b79e72c9fa51885ec0c33e10, 11efd5cb04a184eea4f57b68ea63dddd463158d1 to before 403f96c32c9e24600093d7d0c61c17daeedca957
Linux

Linux · 4.18
Linux

Component: Not specified by the source
File: net/openvswitch/conntrack.c, net/openvswitch/conntrack.h, net/openvswitch/datapath.c, net/openvswitch/datapath.h

Attack conditions (Source advisory, CVSS 3.1): Local · Low privileges required · No user interaction required

What an attacker can do

An unprivileged user can trigger this bug from a user and network namespace, causing a slab-use-after-free in ovs_ct_execute() when the netns is torn down. Source advisory’s CVSS 3.1 assessment (base score 7.8/10) rates confidentiality, integrity and availability impact as high.