CVE-2024-50277: dm: fix a crash if blk_alloc_disk fails
First published: Tue Nov 19 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: dm: fix a crash if blk_alloc_disk fails If blk_alloc_disk fails, the variable md->disk is set to an error value. cleanup_mapped_device will see that md->disk is non-NULL and it will attempt to access it, causing a crash on this statement "md->disk->private_data = NULL;".
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <6.11.8 | |
| Linux Kernel | =6.12-rc1 | |
| Linux Kernel | =6.12-rc2 | |
| Linux Kernel | =6.12-rc3 | |
| Linux Kernel | =6.12-rc4 | |
| Linux Kernel | =6.12-rc5 | |
| Linux Kernel | =6.12-rc6 | |
| debian/linux | <=5.10.223-1<=5.10.226-1<=6.1.123-1<=6.1.128-1 | 6.12.12-1 6.12.15-1 |
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Reference Links
- https://git.kernel.org/stable/c/d7aec2a06730b774a97caaf48cbbc58330a85829
- https://git.kernel.org/stable/c/fed13a5478680614ba97fc87e71f16e2e197912e
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-50277
- https://nvd.nist.gov/vuln/detail/CVE-2024-50277
- https://launchpad.net/bugs/cve/CVE-2024-50277
- https://security-tracker.debian.org/tracker/CVE-2024-50277
- https://ubuntu.com/security/CVE-2024-50277
- https://git.kernel.org/linus/fed13a5478680614ba97fc87e71f16e2e197912e
Frequently Asked Questions
What is the severity of CVE-2024-50277?
CVE-2024-50277 is classified as a moderate severity vulnerability in the Linux kernel.
How do I fix CVE-2024-50277?
To fix CVE-2024-50277, update your Linux kernel to a patched version ideally beyond 6.11.8.
Which versions of the Linux kernel are affected by CVE-2024-50277?
CVE-2024-50277 affects Linux kernel versions up to 6.11.8 and the 6.12 release candidates.
What is the nature of the issue described in CVE-2024-50277?
CVE-2024-50277 addresses a crash vulnerability when blk_alloc_disk fails and a subsequent access to a non-NULL disk occurs.
Is there a workaround for CVE-2024-50277?
There are no recommended workarounds for CVE-2024-50277, thus applying the kernel update is necessary.
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