7.8

CVE-2022-49168

btrfs: do not clean up repair bio if submit fails

In the Linux kernel, the following vulnerability has been resolved:

btrfs: do not clean up repair bio if submit fails

The submit helper will always run bio_endio() on the bio if it fails to
submit, so cleaning up the bio just leads to a variety of use-after-free
and NULL pointer dereference bugs because we race with the endio
function that is cleaning up the bio.  Instead just return BLK_STS_OK as
the repair function has to continue to process the rest of the pages,
and the endio for the repair bio will do the appropriate cleanup for the
page that it was given.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version < 5.10.248
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.184
Linux ≫ Linux Kernel Version >= 5.16 < 5.16.19
Linux ≫ Linux Kernel Version >= 5.17 < 5.17.2
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.28% 0.197
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
134c704f-9b21-4f2e-91b3-4a467353bcc0 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/8cbc3001a3264d998d6b6db3e23f935c158abd4d
Patch
https://git.kernel.org/stable/c/d1cb11fb45ebbb1e7dfe5e9038b32ea72c184b14
Patch
https://git.kernel.org/stable/c/e76c78c48902dae6fa612749f59162bca0a79e0b
Patch
https://git.kernel.org/stable/c/7170875083254b51fcc5d67f96640977083f481e
Patch
https://git.kernel.org/stable/c/e7e1d15d2bd8c373cf621614ddd17971a2132713
Patch