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CVE-2023-1295

22
FAUCET Score

CVE-2023-1295 is a Time-of-Check to Time-of-Use (TOCTOU) vulnerability in the Linux kernel's io_uring subsystem, specifically affecting versions 5.6 through 5.11. This flaw, tracked as CWE-367, allows a local user to escalate privileges to root on affected Linux systems, including those used in NetApp products. With a CVSS score of 7.0 (HIGH), exploitation requires high attack complexity but can lead to full compromise of confidentiality, integrity, and availability. Currently, there is no public exploit code available, no evidence of active exploitation, and minimal community discussion or media coverage, indicating a low immediate threat.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.6, < 5.10.162CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.11, < 5.11.6CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.22%
Probability of exploitation in next 30 days
EPSS Percentile
12.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0022 is in the 39th percentile among its peer group of 1,525 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.4 InfoSec Media, 0.1 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

microsoftpatch availablevia msrc
Product: cm1 kernel 5.10.188.1-1 on CBL Mariner 1.0Fixed in: 5.10.188.1-1

Vendor Advisories (2)

microsoft2023-Jun/CVE-2023-1295Important

Privilege escalation with IO_RING_OP_CLOSE in the Linux Kernel

Jun 13, 2023
redhatCVE-2023-1295Important

kernel: io_uring: TOCTOU vulnerability in IORING_OP_CLOSE operation

Feb 1, 2021

References

git.kernel.org / pub/scm/linux/kernel/git/stable/linux.git/commit
Patch
git.kernel.org / pub/scm/linux/kernel/git/torvalds/linux.git/commit
Patch
git.kernel.org / pub/scm/linux/kernel/git/torvalds/linux.git/commit
Patch
kernel.dance / 788d0824269bef539fe31a785b1517882eafed93
Patch
kernel.dance / 9eac1904d3364254d622bf2c771c4f85cd435fc2
Patch
security.netapp.com / advisory/ntap-20230731-0006
Third Party AdvisoryVDB Entry