Bug 2192175 (CVE-2023-2430) - CVE-2023-2430 kernel: missing lock in io_uring/msg_ring.c for IOPOLL in io_uring cause denial of service
Summary: CVE-2023-2430 kernel: missing lock in io_uring/msg_ring.c for IOPOLL in io_ur...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2023-2430
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 2172289
TreeView+ depends on / blocked
 
Reported: 2023-04-30 06:37 UTC by Rohit Keshri
Modified: 2023-12-21 06:01 UTC (History)
47 users (show)

Fixed In Version: Kernel 6.2 RC5
Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found due to a missing lock for the IOPOLL in io_cqring_event_overflow() in io_uring.c in the Linux kernel. This flaw allows a local attacker with user privileges to trigger a denial of service.
Clone Of:
Environment:
Last Closed: 2023-04-30 11:40:21 UTC
Embargoed:

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Description Rohit Keshri 2023-04-30 06:37:13 UTC 
A vulnerability due to missing lock on overflow for IOPOLL bug in io_cqring_event_overflow() in io_uring.c in Linux kernel through v6.2-rc5, which allows an attacker to trigger Denial of Service.

This bug has already been reported to kernel developers early in January
and Jens has done a patch: 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e12d7a46f65ae4b7d58a5e0c1cbfa825cf8

The earliest reports can be found at:
https://groups.google.com/g/syzkaller/c/T04q4HMUCdA/m/qVaOqv2RAAAJ
Comment 1 Product Security DevOps Team 2023-04-30 11:40:17 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2023-2430
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