Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected f88649721268999bdff09777847080a52004f691 before 547087307bc19417b4f2bc85ba9664a3e8db5a6a; affected f88649721268999bdff09777847080a52004f691 before e3915f028b1f1c37e87542e5aadd33728c259d96; affected f88649721268999bdff09777847080a52004f691 before a60db84f772fc3a906c6c4072f9207579c41166f; affected f88649721268999bdff09777847080a52004f691 before eae7435b48ffc8e9be0ff9cfeae40af479a609dd; affected f88649721268999bdff09777847080a52004f691 before 3c7c918ec0aa3555372c5a57f18780b7a96c5cfc; affected f88649721268999bdff09777847080a52004f691 before ac888d58869bb99753e7652be19a151df9ecb35d; affected 86e48c03d774e01ccd71ecba4fc4b5c2bc0b5b41; affected 591b1e1bb40152e22cee757f493046a0ca946bf8; affected df90819dafcd6b97fc665f63a15752a570e227a2; affected 9a4fe697023dbe6c25caa1f8b2153af869a29bd2; affected 3.10.50 before 3.11; affected 3.12.26 before 3.13; affected 3.14.14 before 3.15; affected 3.15.7 before 3.16 |
| Linux / Linux | affected 3.16; unaffected 0 before 3.16; unaffected 5.10.230 through 5.10.*; unaffected 5.15.172 through 5.15.*; unaffected 6.1.117 through 6.1.*; unaffected 6.6.57 through 6.6.*; unaffected 6.11.4 through 6.11.*; unaffected 6.12 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/547087307bc19417b4f2bc85ba9664a3e8db5a6a
- https://git.kernel.org/stable/c/e3915f028b1f1c37e87542e5aadd33728c259d96
- https://git.kernel.org/stable/c/a60db84f772fc3a906c6c4072f9207579c41166f
- https://git.kernel.org/stable/c/eae7435b48ffc8e9be0ff9cfeae40af479a609dd
- https://git.kernel.org/stable/c/3c7c918ec0aa3555372c5a57f18780b7a96c5cfc
- https://git.kernel.org/stable/c/ac888d58869bb99753e7652be19a151df9ecb35d
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.