Medium severity · published Dec 8, 2023
CVE-2023-6560
Kernel: io_uring out of boundary memory access in __io_uaddr_map()
5.5
CVSS
0.3%
EPSS
No
On KEV
Description
An out-of-bounds memory access flaw was found in the io_uring SQ/CQ rings functionality in the Linux kernel. This issue could allow a local user to crash the system.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
through 6.6; 6.7; 6.7; 6.7; 6.7 · source: vendor, NVD
FE
Fedora · Fedora
All versions, or not specified · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-6560
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-6560
packetstormsecurity.com
http://packetstormsecurity.com/files/176405/io_uring-__io_uaddr_map-Dangerous-Multi-Page-Handling.html
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-6560
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2253249
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AU4NHBDEDLRW33O76Y6LFECEYNQET5GZ/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UCQIPFUQXKXRCH5Y4RP3C5NK4IHNBNVK/
Mailing List
https://patchwork.kernel.org/project/io-uring/patch/20231130194633.649319-2-axboe@kernel.dk/
More from Kernel
9.8
CVE-2025-39682
tls: fix handling of zero-length records on the rx_list
8.8
CVE-2026-53266
netfilter: bridge: make ebt_snat ARP rewrite writable
8.8
CVE-2013-6282
Linux Kernel Improper Input Validation Vulnerability
8.4
CVE-2022-0185
Linux Kernel Heap-Based Buffer Overflow Vulnerability
8.4
CVE-2013-2094
Linux Kernel Privilege Escalation Vulnerability