CVE-2022-48636
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.24% probability · 15th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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
- https://git.kernel.org/stable/c/f5fcc9d6d71d9ff7fdbdd4b89074e6e24fffc20bPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.