Bug 2246980 (CVE-2023-46862) - CVE-2023-46862 kernel: NULL pointer dereference vulnerability in io_uring_show_fdinfo
Summary: CVE-2023-46862 kernel: NULL pointer dereference vulnerability in io_uring_sho...
Keywords:
Status: NEW
Alias: CVE-2023-46862
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2251043
Blocks: 2249092
TreeView+ depends on / blocked
 
Reported: 2023-10-30 10:11 UTC by Avinash Hanwate
Modified: 2024-05-02 22:50 UTC (History)
40 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A null pointer dereference flaw was found in the Linux kernel's io_uring functionality. This issue could allow a local user to crash the system.
Clone Of:
Environment:
Last Closed:
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2024:2634 0 None None None 2024-05-01 01:22:08 UTC
Red Hat Product Errata RHBA-2024:2650 0 None None None 2024-05-02 00:14:55 UTC
Red Hat Product Errata RHBA-2024:2686 0 None None None 2024-05-02 22:50:03 UTC
Red Hat Product Errata RHSA-2024:2394 0 None None None 2024-04-30 10:14:13 UTC

Description Avinash Hanwate 2023-10-30 10:11:00 UTC 
An issue was discovered in the Linux kernel through 6.5.9. During a race with SQ thread exit, an io_uring/fdinfo.c io_uring_show_fdinfo NULL pointer dereference can occur.

https://github.com/torvalds/linux/commit/7644b1a1c9a7ae8ab99175989bfc8676055edb46
https://bugzilla.kernel.org/show_bug.cgi?id=218032#c4
Comment 3 Alex 2023-11-22 14:41:09 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2251043]
Comment 4 Justin M. Forbes 2023-11-22 16:33:48 UTC 
This was fixed for Fedora with the 6.5.10 stable kernel updates.
Comment 6 errata-xmlrpc 2024-04-30 10:14:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:2394 https://access.redhat.com/errata/RHSA-2024:2394
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