CVE-2023-6560: Kernel: io_uring out of boundary memory access in __io_uaddr_map()
First published: Wed Dec 06 2023(Updated: )
A flaw in the Linux Kernel found. For the io_uring SQ/CQ rings, out of boundaries memory access could happen as result of incorrect behavior in function __io_uaddr_map for the case of not physically contiguous memory. Reference: <a href="https://patchwork.kernel.org/project/io-uring/patch/20231130194633.649319-2-axboe@kernel.dk/">https://patchwork.kernel.org/project/io-uring/patch/20231130194633.649319-2-axboe@kernel.dk/</a>
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <=6.6 | |
| Linux Linux kernel | =6.7-rc1 | |
| Linux Linux kernel | =6.7-rc2 | |
| Linux Linux kernel | =6.7-rc3 | |
| Linux Linux kernel | =6.7-rc4 | |
| redhat/kernel | <6.7 | 6.7 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.6-1 6.12.9-1 |
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Reference Links
- http://packetstormsecurity.com/files/176405/io_uring-__io_uaddr_map-Dangerous-Multi-Page-Handling.html
- https://access.redhat.com/security/cve/CVE-2023-6560
- https://bugzilla.redhat.com/show_bug.cgi?id=2253249
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AU4NHBDEDLRW33O76Y6LFECEYNQET5GZ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UCQIPFUQXKXRCH5Y4RP3C5NK4IHNBNVK/
- https://patchwork.kernel.org/project/io-uring/patch/20231130194633.649319-2-axboe@kernel.dk/
- https://launchpad.net/bugs/cve/CVE-2023-6560
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2253251
- https://git.kernel.org/linus/820d070feb668aab5bc9413c285a1dda2a70e076
- https://security-tracker.debian.org/tracker/CVE-2023-6560
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6560
- https://nvd.nist.gov/vuln/detail/CVE-2023-6560
- https://ubuntu.com/security/CVE-2023-6560
Frequently Asked Questions
What is CVE-2023-6560?
CVE-2023-6560 is a vulnerability in the Linux kernel's io_uring SQ/CQ rings functionality, which allows a local user to trigger an out-of-bounds memory access.
How severe is CVE-2023-6560?
CVE-2023-6560 has a severity rating of medium with a CVSS score of 5.5.
How can a local user exploit CVE-2023-6560?
A local user can exploit CVE-2023-6560 by triggering an out-of-bounds memory access in the io_uring SQ/CQ rings functionality.
Which versions of the Linux kernel are affected by CVE-2023-6560?
Versions up to exclusive 6.7 of the Red Hat kernel are affected by CVE-2023-6560.
Is there a fix available for CVE-2023-6560?
Yes, a fix for CVE-2023-6560 is available. Please refer to the references for more information.
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