5.5
MEDIUM
CVSS 3.1
CVE-2026-45993
LoongArch: Add spectre boundry for syscall dispatch table
Overview
Description
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.
Details
INFO
Published Date :
May 27, 2026, 2:17 p.m.
Last Modified :
June 19, 2026, 1:16 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
Apply kernel updates to LoongArch systems to implement bounds checking for syscall dispatch.
- Update the Linux kernel on LoongArch systems.
- Ensure syscall dispatch tables have bounds checking.
- Reboot systems after applying updates.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45993.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45993 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45993
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45993 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45993 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 19, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/c8a8e863928424046b8fd328f02c359baa0a0c3f Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'be769645a2aef577f07afdcb4de8fad20b6d57c0', 'lessThan': '108f2cd13577a410c0ad6ea00708596d9d0dfc90', 'versionType': 'git'}, {'status': 'affected', 'version': 'be769645a2aef577f07afdcb4de8fad20b6d57c0', 'lessThan': '07040904ad217545be096d4280ed33c02f6a3750', 'versionType': 'git'}, {'status': 'affected', 'version': 'be769645a2aef577f07afdcb4de8fad20b6d57c0', 'lessThan': '85cbf7fb568af5358aae61925c4e66b8f5e1439d', 'versionType': 'git'}, {'status': 'affected', 'version': 'be769645a2aef577f07afdcb4de8fad20b6d57c0', 'lessThan': 'bc84a109c2082dd0c4b38e8d923c046b41977533', 'versionType': 'git'}, {'status': 'affected', 'version': 'be769645a2aef577f07afdcb4de8fad20b6d57c0', 'lessThan': '0c965d2784fbbd7f8e3b96d875c9cfdf7c00da3d', 'versionType': 'git'}], 'programFiles': ['arch/loongarch/kernel/syscall.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.140', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.86', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.27', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.4', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['arch/loongarch/kernel/syscall.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'be769645a2aef577f07afdcb4de8fad20b6d57c0', 'lessThan': 'c8a8e863928424046b8fd328f02c359baa0a0c3f', 'versionType': 'git'}, {'status': 'affected', 'version': 'be769645a2aef577f07afdcb4de8fad20b6d57c0', 'lessThan': '108f2cd13577a410c0ad6ea00708596d9d0dfc90', 'versionType': 'git'}, {'status': 'affected', 'version': 'be769645a2aef577f07afdcb4de8fad20b6d57c0', 'lessThan': '07040904ad217545be096d4280ed33c02f6a3750', 'versionType': 'git'}, {'status': 'affected', 'version': 'be769645a2aef577f07afdcb4de8fad20b6d57c0', 'lessThan': '85cbf7fb568af5358aae61925c4e66b8f5e1439d', 'versionType': 'git'}, {'status': 'affected', 'version': 'be769645a2aef577f07afdcb4de8fad20b6d57c0', 'lessThan': 'bc84a109c2082dd0c4b38e8d923c046b41977533', 'versionType': 'git'}, {'status': 'affected', 'version': 'be769645a2aef577f07afdcb4de8fad20b6d57c0', 'lessThan': '0c965d2784fbbd7f8e3b96d875c9cfdf7c00da3d', 'versionType': 'git'}], 'programFiles': ['arch/loongarch/kernel/syscall.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.176', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.140', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.86', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.27', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.4', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['arch/loongarch/kernel/syscall.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'be769645a2aef577f07afdcb4de8fad20b6d57c0', 'lessThan': '108f2cd13577a410c0ad6ea00708596d9d0dfc90', 'versionType': 'git'}, {'status': 'affected', 'version': 'be769645a2aef577f07afdcb4de8fad20b6d57c0', 'lessThan': '07040904ad217545be096d4280ed33c02f6a3750', 'versionType': 'git'}, {'status': 'affected', 'version': 'be769645a2aef577f07afdcb4de8fad20b6d57c0', 'lessThan': '85cbf7fb568af5358aae61925c4e66b8f5e1439d', 'versionType': 'git'}, {'status': 'affected', 'version': 'be769645a2aef577f07afdcb4de8fad20b6d57c0', 'lessThan': 'bc84a109c2082dd0c4b38e8d923c046b41977533', 'versionType': 'git'}, {'status': 'affected', 'version': 'be769645a2aef577f07afdcb4de8fad20b6d57c0', 'lessThan': '0c965d2784fbbd7f8e3b96d875c9cfdf7c00da3d', 'versionType': 'git'}], 'programFiles': ['arch/loongarch/kernel/syscall.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.140', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.86', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.27', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.4', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['arch/loongarch/kernel/syscall.c'], 'defaultStatus': 'affected'}] -
Initial Analysis by [email protected]
Jun. 16, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.86 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.19 up to (excluding) 6.6.140 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.27 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.4 Added Reference Type kernel.org: https://git.kernel.org/stable/c/07040904ad217545be096d4280ed33c02f6a3750 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/0c965d2784fbbd7f8e3b96d875c9cfdf7c00da3d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/108f2cd13577a410c0ad6ea00708596d9d0dfc90 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/85cbf7fb568af5358aae61925c4e66b8f5e1439d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/bc84a109c2082dd0c4b38e8d923c046b41977533 Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 27, 2026
Action Type Old Value New Value Added Description 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. Added Reference https://git.kernel.org/stable/c/07040904ad217545be096d4280ed33c02f6a3750 Added Reference https://git.kernel.org/stable/c/0c965d2784fbbd7f8e3b96d875c9cfdf7c00da3d Added Reference https://git.kernel.org/stable/c/108f2cd13577a410c0ad6ea00708596d9d0dfc90 Added Reference https://git.kernel.org/stable/c/85cbf7fb568af5358aae61925c4e66b8f5e1439d Added Reference https://git.kernel.org/stable/c/bc84a109c2082dd0c4b38e8d923c046b41977533
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.