Bug 2348002 (CVE-2022-49053) - CVE-2022-49053 kernel: scsi: target: tcmu: Fix possible page UAF
Summary: CVE-2022-49053 kernel: scsi: target: tcmu: Fix possible page UAF
Keywords:
Status: NEW
Alias: CVE-2022-49053
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 03:14 UTC by OSIDB Bzimport
Modified: 2025-02-26 18:28 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2025-02-26 03:14:11 UTC 
In the Linux kernel, the following vulnerability has been resolved:

scsi: target: tcmu: Fix possible page UAF

tcmu_try_get_data_page() looks up pages under cmdr_lock, but it does not
take refcount properly and just returns page pointer. When
tcmu_try_get_data_page() returns, the returned page may have been freed by
tcmu_blocks_release().

We need to get_page() under cmdr_lock to avoid concurrent
tcmu_blocks_release().
Comment 1 Avinash Hanwate 2025-02-26 14:17:35 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022652-CVE-2022-49053-a1fe@gregkh/T
Comment 4 Avinash Hanwate 2025-02-26 18:27:47 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022652-CVE-2022-49053-a1fe@gregkh/T
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