CVE-2022-50007: linux kernel — Fix

Description

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.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor	Product	Versions
linux	linux_kernel	2.6.20 — 4.9.327
linux	linux_kernel	4.10 — 4.14.292
linux	linux_kernel	4.15 — 4.19.257
linux	linux_kernel	4.20 — 5.4.212
linux	linux_kernel	5.5 — 5.10.140
linux	linux_kernel	5.11 — 5.15.64
linux	linux_kernel	5.16 — 5.19.6
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/0769491a8acd3e85ca4c3f65080eac2c824262df https://git.kernel.org/stable/c/1305d7d4f35ca6f214a2d23b075aa6a924cff3be https://git.kernel.org/stable/c/18e6b6e2555c93f5ca09f2b85ef1fa025c8accea https://git.kernel.org/stable/c/26ad2398fe4984f4f6f930bcb3bc9047fa77265b https://git.kernel.org/stable/c/63da7a2bbf3f28094920e0b8a17d2571a9bd842d https://git.kernel.org/stable/c/8f94b933103ee1bda119543369cc18a1be5536db https://git.kernel.org/stable/c/9c9cb23e00ddf45679b21b4dacc11d1ae7961ebe https://git.kernel.org/stable/c/d66c052879791313f90c0584420f196a038fb8b8

Frequently Asked Questions

What is 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 __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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-50007? +

CVE-2022-50007 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2022-50007? +

CVE-2022-50007 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2022-50007? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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