7.8

CVE-2022-49411

bfq: Make sure bfqg for which we are queueing requests is online

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

bfq: Make sure bfqg for which we are queueing requests is online

Bios queued into BFQ IO scheduler can be associated with a cgroup that
was already offlined. This may then cause insertion of this bfq_group
into a service tree. But this bfq_group will get freed as soon as last
bio associated with it is completed leading to use after free issues for
service tree users. Fix the problem by making sure we always operate on
online bfq_group. If the bfq_group associated with the bio is not
online, we pick the first online parent.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.12 < 5.4.198
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.121
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.46
Linux ≫ Linux Kernel Version >= 5.16 < 5.17.14
Linux ≫ Linux Kernel Version >= 5.18 < 5.18.3
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.28% 0.199
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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/075a53b78b815301f8d3dd1ee2cd99554e34f0dd
Patch
https://git.kernel.org/stable/c/51f724bffa3403a5236597e6b75df7329c1ec6e9
Patch
https://git.kernel.org/stable/c/6ee0868b0c3ccead5907685fcdcdd0c08dfe4b0b
Patch
https://git.kernel.org/stable/c/7781c38552e6cc54ed8e9040279561340516b881
Patch
https://git.kernel.org/stable/c/97bd6c56bdcb41079e488e31df56809e3b2ce628
Patch
https://git.kernel.org/stable/c/ccddf8cd411c1800863ed357064e56ceffd356bb
Patch