CVE-2023-53116: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: nvmet: avoid potential UAF in nvmet_req_complete() An nvme target ->queue_response() operation implementation may free the request passed as argument. Such implementation potentially could result in a use after free of the request pointer when percpu_ref_put() is called in nvmet_req_complete(). Avoid such problem by using a local variable to save the sq pointer before calling __nvmet_req_complete(), thus avoiding dereferencing the req pointer after that function call.

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CVSS v3.1 Score

7.8

HIGH

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

Weakness Type (CWE)

CWE-416 Use After Free

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.8 — 4.14.311
linux	linux_kernel	4.15 — 4.19.279
linux	linux_kernel	4.20 — 5.4.238
linux	linux_kernel	5.5 — 5.10.176
linux	linux_kernel	5.11 — 5.15.104
linux	linux_kernel	5.16 — 6.1.21
linux	linux_kernel	6.2 — 6.2.8
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/04c394208831d5e0d5cfee46722eb0f033cd4083 https://git.kernel.org/stable/c/6173a77b7e9d3e202bdb9897b23f2a8afe7bf286 https://git.kernel.org/stable/c/8ed9813871038b25a934b21ab76b5b7dbf44fc3a https://git.kernel.org/stable/c/a6317235da8aa7cb97529ebc8121cc2a4c4c437a https://git.kernel.org/stable/c/bcd535f07c58342302a2cd2bdd8894fe0872c8a9 https://git.kernel.org/stable/c/e5d99b29012bbf0e86929403209723b2806500c1 https://git.kernel.org/stable/c/f1d5888a5efe345b63c430b256e95acb0a475642 https://git.kernel.org/stable/c/fafcb4b26393870c45462f9af6a48e581dbbcf7e

Frequently Asked Questions

What is CVE-2023-53116? +

In the Linux kernel, the following vulnerability has been resolved: nvmet: avoid potential UAF in nvmet_req_complete() An nvme target ->queue_response() operation implementation may free the request passed as argument. Such implementation potentially could result in a use after free of the request pointer when percpu_ref_put() is called in nvmet_req_complete(). Avoid such problem by using a local variable to save the sq pointer before calling __nvmet_req_complete(), thus avoiding dereferencing the req pointer after that function call. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-53116? +

CVE-2023-53116 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2023-53116? +

CVE-2023-53116 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-2023-53116? +

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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