Bug 2347804 (CVE-2022-49426) - CVE-2022-49426 kernel: iommu/arm-smmu-v3-sva: Fix mm use-after-free
Summary: CVE-2022-49426 kernel: iommu/arm-smmu-v3-sva: Fix mm use-after-free
Keywords:
Status: NEW
Alias: CVE-2022-49426
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: 2025-02-26 03:07 UTC by OSIDB Bzimport
Modified: 2025-05-13 11:38 UTC (History)
4 users (show)

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

Attachments (Terms of Use)

Description OSIDB Bzimport 2025-02-26 03:07:18 UTC 
In the Linux kernel, the following vulnerability has been resolved:

iommu/arm-smmu-v3-sva: Fix mm use-after-free

We currently call arm64_mm_context_put() without holding a reference to
the mm, which can result in use-after-free. Call mmgrab()/mmdrop() to
ensure the mm only gets freed after we unpinned the ASID.
Comment 1 Avinash Hanwate 2025-02-26 14:07:32 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022655-CVE-2022-49426-313d@gregkh/T
Comment 4 Avinash Hanwate 2025-02-26 18:14:34 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022655-CVE-2022-49426-313d@gregkh/T
Note You need to log in before you can comment on or make changes to this bug.