Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup Fix Oops in dasd_alias_get_start_dev() function caused by the pavgroup pointer being NULL. The pavgroup pointer is checked on the entrance of the function but without the lcu->lock being held. Therefore there is a race window between dasd_alias_get_start_dev() and _lcu_update() which sets pavgroup to NULL with the lcu->lock held. Fix by checking the pavgroup pointer with lcu->lock held.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 2.6.25, < 4.9.330 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/2e473351400e3dd66f0b71eddcef82ee45a584c1Patch
- https://git.kernel.org/stable/c/49f401a98b318761ca2e15d4c7869a20043fbed4Patch
- https://git.kernel.org/stable/c/650a2e79d176db753654d3dde88e53a2033036acPatch
- https://git.kernel.org/stable/c/aaba5ff2742043705bc4c02fd0b2b246e2e16da1Patch
- https://git.kernel.org/stable/c/d3a67c21b18f33c79382084af556557c442f12a6Patch
- https://git.kernel.org/stable/c/d86b4267834e6d4af62e3073e48166e349ab1b70Patch
- https://git.kernel.org/stable/c/db7ba07108a48c0f95b74fabbfd5d63e924f992dPatch
- https://git.kernel.org/stable/c/f5fcc9d6d71d9ff7fdbdd4b89074e6e24fffc20bPatch
- https://git.kernel.org/stable/c/2e473351400e3dd66f0b71eddcef82ee45a584c1Patch
- https://git.kernel.org/stable/c/49f401a98b318761ca2e15d4c7869a20043fbed4Patch
- https://git.kernel.org/stable/c/650a2e79d176db753654d3dde88e53a2033036acPatch
- https://git.kernel.org/stable/c/aaba5ff2742043705bc4c02fd0b2b246e2e16da1Patch
- https://git.kernel.org/stable/c/d3a67c21b18f33c79382084af556557c442f12a6Patch
- https://git.kernel.org/stable/c/d86b4267834e6d4af62e3073e48166e349ab1b70Patch
- https://git.kernel.org/stable/c/db7ba07108a48c0f95b74fabbfd5d63e924f992dPatch
FAQ
What is CVE-2022-48636?
CVE-2022-48636 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup Fix Oops in dasd_alias_get_start_dev() function caused by ...
How severe is CVE-2022-48636?
CVE-2022-48636 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-48636?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.