CVE-2022-49089: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: IB/rdmavt: add lock to call to rvt_error_qp to prevent a race condition The documentation of the function rvt_error_qp says both r_lock and s_lock need to be held when calling that function. It also asserts using lockdep that both of those locks are held. However, the commit I referenced in Fixes accidentally makes the call to rvt_error_qp in rvt_ruc_loopback no longer covered by r_lock. This results in the lockdep assertion failing and also possibly in a race condition.

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CVSS v3.1 Score

4.7

MEDIUM

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

Weakness Type (CWE)

CWE-362 CWE-362

CWE-667 CWE-667

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.0.4 — 5.4.189
linux	linux_kernel	5.5 — 5.10.111
linux	linux_kernel	5.11 — 5.15.34
linux	linux_kernel	5.16 — 5.16.20
linux	linux_kernel	5.17 — 5.17.3
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/43c2d7890ecabe527448a6c391fb2d9a5e6bbfe0 https://git.kernel.org/stable/c/4d809f69695d4e7d1378b3a072fa9aef23123018 https://git.kernel.org/stable/c/57800cc36e55db0547461c49acf5cd84c0f502b0 https://git.kernel.org/stable/c/77ffb2495a41098f9d6a14f8aefde3188da75944 https://git.kernel.org/stable/c/8a50937227c385a477177c9ffa122b4230e40666 https://git.kernel.org/stable/c/92f1947c0d26060e978b3a9f21f32ce7c8c9cca3

Frequently Asked Questions

What is CVE-2022-49089? +

In the Linux kernel, the following vulnerability has been resolved: IB/rdmavt: add lock to call to rvt_error_qp to prevent a race condition The documentation of the function rvt_error_qp says both r_lock and s_lock need to be held when calling that function. It also asserts using lockdep that both of those locks are held. However, the commit I referenced in Fixes accidentally makes the call to rvt_error_qp in rvt_ruc_loopback no longer covered by r_lock. This results in the lockdep assertion failing and also possibly in a race condition. It has a CVSS v3.1 base score of 4.7 (MEDIUM).

How severe is CVE-2022-49089? +

CVE-2022-49089 has a CVSS v3.1 score of 4.7 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-2022-49089? +

CVE-2022-49089 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-2022-49089? +

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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CVE-2022-49089