Bug 1961292 (CVE-2019-25044) - CVE-2019-25044 kernel: use-after-free in the block subsystem related to blk_mq_free_rqs and blk_cleanup_queue
Summary: CVE-2019-25044 kernel: use-after-free in the block subsystem related to blk_m...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2019-25044
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1961293
Blocks: Embargoed1961294
TreeView+ depends on / blocked
 
Reported: 2021-05-17 16:20 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-06-09 03:26 UTC (History)
42 users (show)

Fixed In Version:
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A flaw was found in the Linux kernel. The block subsystem has a use-after-free that can lead to arbitrary code execution in the kernel context and privilege escalation. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Clone Of:
Environment:
Last Closed: 2021-06-01 15:09:59 UTC

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Description Guilherme de Almeida Suckevicz 2021-05-17 16:20:08 UTC 
The block subsystem in the Linux kernel before 5.2 has a use-after-free that can lead to arbitrary code execution in the kernel context and privilege escalation. This is related to blk_mq_free_rqs and blk_cleanup_queue.

Reference and upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c3e2219216c92919a6bd1711f340f5faa98695e6
Comment 1 Guilherme de Almeida Suckevicz 2021-05-17 16:20:57 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1961293]
Comment 2 Justin M. Forbes 2021-05-17 20:27:58 UTC 
This was fixed for Fedora with the 5.2 stable kernel rebases.
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