Threats Tagged 'cve-2026-89488'
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Threats Tagged 'cve-2026-89488'
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A use-after-free vulnerability in the Linux kernel's openvswitch component related to connection tracking (CT) limit teardown has been resolved. The flaw arises because packet processing uses CT limit state under RCU while the network namespace teardown frees that state under a mutex, allowing dereferencing of freed memory. An unprivileged user can trigger this from user and network namespaces, causing a slab-use-after-free in ovs_ct_execute() during netns teardown. The fix involves publishing the CT limit pointer through RCU, removing it before teardown, and waiting for readers before freeing its contents, along with proper locking and synchronization during updates and teardown. Join the discussion | GCVE Database | 09/11/2026, 21:31:28 UTC Added: 09/12/2026, 00:43:05 UTC |
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