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CVE-2023-6560

18
FAUCET Score

CVE-2023-6560 is an out-of-bounds memory access flaw in the io_uring SQ/CQ rings functionality of the Linux kernel. This vulnerability could allow a local user to crash the system. It has a CVSS score of 5.5 (Medium), indicating a local attack vector with low complexity and high impact on availability. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE match
cpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*
<= 6.6CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
6.7CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.7:rc1:*:*:*:*:*:*
6.7CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.7:rc2:*:*:*:*:*:*
6.7CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.7:rc3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.28%
Probability of exploitation in next 30 days
EPSS Percentile
20.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0028 is in the 76th percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia msrc
Product: cbl2 kernel 5.15.153.1-1 on CBL Mariner 2.0Fixed in: 5.15.153.1-1
microsoftpatch availablevia msrc
Product: 16838-16823Fixed in: 5.15.153.1-1

Vendor Advisories (2)

microsoft2023-Dec/CVE-2023-6560Moderate

Kernel: io_uring out of boundary memory access in __io_uaddr_map()

Dec 12, 2023
redhatCVE-2023-6560Moderate

kernel: io_uring out of boundary memory access in __io_uaddr_map()

Nov 30, 2023

References

packetstormsecurity.com / files/176405/io_uring-__io_uaddr_map-Dangerous-Multi-Page-Handling.html
access.redhat.com / security/cve/CVE-2023-6560
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue Tracking
lists.fedoraproject.org / archives/list/[email protected]/message/AU4NHBDEDLRW33O76Y6LFECEYNQET5GZ
lists.fedoraproject.org / archives/list/[email protected]/message/UCQIPFUQXKXRCH5Y4RP3C5NK4IHNBNVK
patchwork.kernel.org / project/io-uring/patch/[email protected]
Mailing ListPatch