Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx() Fix the race by pruning the bin while still holding xfrm_policy_lock, before dropping it. Use __xfrm_policy_inexact_prune_bin() directly since the lock is already held. The wrapper xfrm_policy_inexact_prune_bin() becomes unused and is removed. Race: CPU0 (XFRM_MSG_DELPOLICY) CPU1 (XFRM_MSG_NEWSPDINFO) ========================== ========================== xfrm_policy_bysel_ctx(): spin_lock_bh(xfrm_policy_lock) bin = xfrm_policy_inexact_lookup() __xfrm_policy_unlink(pol) spin_unlock_bh(xfrm_policy_lock) xfrm_policy_kill(ret) // wide window, lock not held xfrm_hash_rebuild(): spin_lock_bh(xfrm_policy_lock) __xfrm_policy_inexact_flush(): kfree_rcu(bin) // bin freed spin_unlock_bh(xfrm_policy_lock) xfrm_policy_inexact_prune_bin(bin) // UAF: bin is freed
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 6be3b0db6db82cf056a72cc18042048edd27f8ee before 8fc536e9f6856230f19c7d13e71af064b6a77b22; affected 6be3b0db6db82cf056a72cc18042048edd27f8ee before c4c1ea36d83bf3c4569468ca5b8b614fda1bf821; affected 6be3b0db6db82cf056a72cc18042048edd27f8ee before 25c8c7fb3b0b9668c7d05e209f58c158d2b020c7; affected 6be3b0db6db82cf056a72cc18042048edd27f8ee before 42827d03f8009a6a218bacab153e21f39d6a121c; affected 6be3b0db6db82cf056a72cc18042048edd27f8ee before 88697cf980222d5906a37bf47662dac0732e2a0f; affected 6be3b0db6db82cf056a72cc18042048edd27f8ee before b5316e2b8614a87d8736941972441cb47bfd4491; affected 6be3b0db6db82cf056a72cc18042048edd27f8ee before ec82ea4eb220164d854f8734ca5a35e23e577b94; affected 6be3b0db6db82cf056a72cc18042048edd27f8ee before 7f2d76c9c03257c0782afef9d95321fa04096f60 |
| Linux / Linux | affected 5.0; unaffected 0 before 5.0; unaffected 5.10.259 through 5.10.*; unaffected 5.15.210 through 5.15.*; unaffected 6.1.176 through 6.1.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.94 through 6.12.*; unaffected 6.18.36 through 6.18.*; unaffected 7.0.13 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/8fc536e9f6856230f19c7d13e71af064b6a77b22
- https://git.kernel.org/stable/c/c4c1ea36d83bf3c4569468ca5b8b614fda1bf821
- https://git.kernel.org/stable/c/25c8c7fb3b0b9668c7d05e209f58c158d2b020c7
- https://git.kernel.org/stable/c/42827d03f8009a6a218bacab153e21f39d6a121c
- https://git.kernel.org/stable/c/88697cf980222d5906a37bf47662dac0732e2a0f
- https://git.kernel.org/stable/c/b5316e2b8614a87d8736941972441cb47bfd4491
- https://git.kernel.org/stable/c/ec82ea4eb220164d854f8734ca5a35e23e577b94
- https://git.kernel.org/stable/c/7f2d76c9c03257c0782afef9d95321fa04096f60
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.