CVE-2022-50007

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux134b0fc544ba062498451611cb6f3e4454221b3d < 18e6b6e2555c93f5ca09f2b85ef1fa025c8acceaaffected
LinuxLinux134b0fc544ba062498451611cb6f3e4454221b3d < 8f94b933103ee1bda119543369cc18a1be5536dbaffected
LinuxLinux134b0fc544ba062498451611cb6f3e4454221b3d < 0769491a8acd3e85ca4c3f65080eac2c824262dfaffected
LinuxLinux134b0fc544ba062498451611cb6f3e4454221b3d < 63da7a2bbf3f28094920e0b8a17d2571a9bd842daffected
LinuxLinux134b0fc544ba062498451611cb6f3e4454221b3d < 1305d7d4f35ca6f214a2d23b075aa6a924cff3beaffected
LinuxLinux134b0fc544ba062498451611cb6f3e4454221b3d < 26ad2398fe4984f4f6f930bcb3bc9047fa77265baffected
LinuxLinux134b0fc544ba062498451611cb6f3e4454221b3d < d66c052879791313f90c0584420f196a038fb8b8affected
LinuxLinux134b0fc544ba062498451611cb6f3e4454221b3d < 9c9cb23e00ddf45679b21b4dacc11d1ae7961ebeaffected
LinuxLinux2.6.19affected
LinuxLinux0 < 2.6.19unaffected
LinuxLinux4.9.327 <= 4.9.*unaffected
LinuxLinux4.14.292 <= 4.14.*unaffected
LinuxLinux4.19.257 <= 4.19.*unaffected
LinuxLinux5.4.212 <= 5.4.*unaffected
LinuxLinux5.10.140 <= 5.10.*unaffected
LinuxLinux5.15.64 <= 5.15.*unaffected
LinuxLinux5.19.6 <= 5.19.*unaffected
LinuxLinux6.0 <= *unaffected

Weaknesses

References