Bug 2363368 (CVE-2022-49786) - CVE-2022-49786 kernel: blk-cgroup: properly pin the parent in blkcg_css_online
Summary: CVE-2022-49786 kernel: blk-cgroup: properly pin the parent in blkcg_css_online
Keywords:
Status: NEW
Alias: CVE-2022-49786
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-05-01 15:01 UTC by OSIDB Bzimport
Modified: 2025-06-06 02:01 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Description OSIDB Bzimport 2025-05-01 15:01:44 UTC 
In the Linux kernel, the following vulnerability has been resolved:

blk-cgroup: properly pin the parent in blkcg_css_online

blkcg_css_online is supposed to pin the blkcg of the parent, but
397c9f46ee4d refactored things and along the way, changed it to pin the
css instead.  This results in extra pins, and we end up leaking blkcgs
and cgroups.
Comment 1 Avinash Hanwate 2025-05-02 06:19:39 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025050121-CVE-2022-49786-bd75@gregkh/T
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