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Tracker / CVE-2024-50036

CVE-2024-50036

Alta 7.8

In the Linux kernel, the following vulnerability has been resolved: net: do not delay dst_entries_add() in dst_release() dst_entries_add() uses per-cpu data that might be freed at netns dismantle from ip6_route_net_exit() calling dst_entries_destroy() Before ip6_route_net_exit() can be called, we release all the dsts associated with this netns, via calls to dst_release(), which waits an rcu grace period before calling dst_destroy() dst_entries_add() use in dst_destroy() is racy, because dst_entries_destroy() could have been called already. Decrementing the number of dsts must happen sooner. Notes: 1) in CONFIG_XFRM case, dst_destroy() can call dst_release_immediate(child), this might also cause UAF if the child does not have DST_NOCOUNT set. IPSEC maintainers might take a look and see how to address this. 2) There is also discussion about removing this count of dst, which might happen in future kernels.

Prodotti e versioni affette

linux linux_kernel
linux linux_kernel · 3.10.50 → 3.11
linux linux_kernel · 3.12.26 → 3.13
linux linux_kernel · 3.14.14 → 3.15
linux linux_kernel · 3.15.7 → 3.16
linux linux_kernel · 3.16 → 6.6.57
linux linux_kernel · 6.7 → 6.11.4

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