CVE-2021-47176 s390/dasd: add missing discipline function

What is CVE-2021-47176?

CVE-2021-47176 is a medium-severity vulnerability in Linux kernel, published on 25 Mar 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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().

Which versions are affected by CVE-2021-47176?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2021-47176?

Apply the vendor's patch.

Is CVE-2021-47176 being exploited?

There is no known exploitation of CVE-2021-47176 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2021-47176, GHSA-8gg9-98mh-rcwr, UBUNTU-CVE-2021-47176.