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CVE-2026-45993

21
FAUCET Score

In the Linux kernel, the following vulnerability has been resolved: LoongArch: Add spectre boundry for syscall dispatch table The LoongArch syscall number is directly controlled by userspace, but does not have a array_index_nospec() boundry to prevent access past the syscall function pointer tables.

First published: May 27, 2026Last modified: Jun 19, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.19, < 6.6.140CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.7, < 6.12.86CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.13, < 6.18.27CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.19, < 7.0.4CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

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
0.14%
Probability of exploitation in next 30 days
EPSS Percentile
3.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0014 is in the 25th percentile among its peer group of 15,940 CVEs.

Social Chatter

No social media mentions found for this CVE.

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: azl3 kernel 6.6.139.1-1 on Azure Linux 3.0Fixed in: 6.6.141.1-1
microsoftpatch availablevia msrc
Product: 21344-17084Fixed in: 6.6.141.1-1

Vendor Advisories (1)

microsoft2026-May/CVE-2026-45993Moderate

LoongArch: Add spectre boundry for syscall dispatch table

May 12, 2026

References

git.kernel.org / stable/c/07040904ad217545be096d4280ed33c02f6a3750
Patch
git.kernel.org / stable/c/0c965d2784fbbd7f8e3b96d875c9cfdf7c00da3d
Patch
git.kernel.org / stable/c/108f2cd13577a410c0ad6ea00708596d9d0dfc90
Patch
git.kernel.org / stable/c/85cbf7fb568af5358aae61925c4e66b8f5e1439d
Patch
git.kernel.org / stable/c/bc84a109c2082dd0c4b38e8d923c046b41977533
Patch
git.kernel.org / stable/c/c8a8e863928424046b8fd328f02c359baa0a0c3f