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medium5.5

CVE-2022-50007

In the Linux kernel, the following vulnerability has been resolved: xfrm: fix refcount leak in __xfrm_policy_check() The issue happens on an error path in __xf…

Impact

In the Linux kernel, the following vulnerability has been resolved: xfrm: fix refcount leak in __xfrm_policy_check() The issue happens on an error path in __xfrm_policy_check(). When the fetching process of the object `pols[1]` fails, the function simply returns 0, forgetting to decrement the reference count of `pols[0]`, which is incremented earlier by either xfrm_sk_policy_lookup() or xfrm_policy_lookup(). This may result in memory leaks. Fix it by decreasing the reference count of `pols[0]` in that path.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 2.6.20 before 4.9.327
from 4.10 before 4.14.292
from 4.15 before 4.19.257
from 4.20 before 5.4.212
from 5.5 before 5.10.140
from 5.11 before 5.15.64

References