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CVE-2023-1194

23
FAUCET Score

CVE-2023-1194 is an out-of-bounds memory read flaw in the KSMBD implementation of the in-kernel Samba server and CIFS in the Linux kernel, affecting Fedora and other Linux distributions. An authenticated attacker can trigger this vulnerability by sending a malformed CREATE command, leading to invalid memory access. With a CVSS score of 8.1 (HIGH), this vulnerability allows for high confidentiality and availability impacts with low attack complexity. There is currently no public exploit code available, nor is it listed on the CISA KEV catalog, indicating no active exploitation. Community discussion and media coverage are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.15, < 5.15.145CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.16, < 6.1.34CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.2, < 6.3.8CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
6.4CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.4:rc1:*:*:*:*:*:*
6.4CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.4:rc2:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.08%
Probability of exploitation in next 30 days
EPSS Percentile
61.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0108 is in the 58th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

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: 18220-16823Fixed in: 5.15.143.1-1
microsoftpatch availablevia msrc
Product: cbl2 kernel 5.15.143.1-1 on CBL Mariner 2.0Fixed in: 5.15.143.1-1

Vendor Advisories (2)

microsoft2023-Nov/CVE-2023-1194Important

Use-after-free in parse_lease_state()

Nov 14, 2023
redhatCVE-2023-1194Moderate

kernel: use-after-free in parse_lease_state()

Oct 2, 2022

References

access.redhat.com / security/cve/CVE-2023-1194
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
security.netapp.com / advisory/ntap-20231221-0006
Third Party Advisory
spinics.net / lists/stable-commits/msg303065.html
Mailing ListPatch