CVE-2021-47176: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: s390/dasd: add missing discipline function Fix crash with illegal operation exception in dasd_device_tasklet. Commit b72949328869 ("s390/dasd: Prepare for additional path event handling") renamed the verify_path function for ECKD but not for FBA and DIAG. This leads to a panic when the path verification function is called for a FBA or DIAG device. Fix by defining a wrapper function for dasd_generic_verify_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	5.4.235 — 5.4.237
linux	linux_kernel	5.10.173 — 5.10.175
linux	linux_kernel	5.11 — 5.12.9
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/6a16810068e70959bc1df686424aa35ce05578f1 https://git.kernel.org/stable/c/a16be88a3d7e5efcb59a15edea87a8bd369630c6 https://git.kernel.org/stable/c/aa8579bc084673c651204f7cd0d6308a47dffc16 https://git.kernel.org/stable/c/c0c8a8397fa8a74d04915f4d3d28cb4a5d401427 https://git.kernel.org/stable/c/6a16810068e70959bc1df686424aa35ce05578f1 https://git.kernel.org/stable/c/a16be88a3d7e5efcb59a15edea87a8bd369630c6 https://git.kernel.org/stable/c/aa8579bc084673c651204f7cd0d6308a47dffc16 https://git.kernel.org/stable/c/c0c8a8397fa8a74d04915f4d3d28cb4a5d401427

Frequently Asked Questions

What is CVE-2021-47176? +

In the Linux kernel, the following vulnerability has been resolved: s390/dasd: add missing discipline function Fix crash with illegal operation exception in dasd_device_tasklet. Commit b72949328869 ("s390/dasd: Prepare for additional path event handling") renamed the verify_path function for ECKD but not for FBA and DIAG. This leads to a panic when the path verification function is called for a FBA or DIAG device. Fix by defining a wrapper function for dasd_generic_verify_path(). It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47176? +

CVE-2021-47176 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-2021-47176? +

CVE-2021-47176 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-2021-47176? +

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-2021-47176