CVE-2026-45993
CVE-2026-45993 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Medium (CVSS 3.x base score 5.5)
- EPSS exploit prediction: 0% (3rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-32289
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-45993?
- 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.
- How severe is CVE-2026-45993?
- CVE-2026-45993 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2026-45993 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-45993?
- CVE-2026-45993 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-45993?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-45993 have an EU (EUVD) identifier?
- Yes. CVE-2026-45993 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32289.
- When was CVE-2026-45993 published?
- CVE-2026-45993 was published on 2026-05-27 and last updated on 2026-06-19.
References
- https://git.kernel.org/stable/c/07040904ad217545be096d4280ed33c02f6a3750
- https://git.kernel.org/stable/c/0c965d2784fbbd7f8e3b96d875c9cfdf7c00da3d
- https://git.kernel.org/stable/c/108f2cd13577a410c0ad6ea00708596d9d0dfc90
- https://git.kernel.org/stable/c/85cbf7fb568af5358aae61925c4e66b8f5e1439d
- https://git.kernel.org/stable/c/bc84a109c2082dd0c4b38e8d923c046b41977533
- https://git.kernel.org/stable/c/c8a8e863928424046b8fd328f02c359baa0a0c3f
Affected products (1)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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