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Vulnerabilities

Security fix · CVE-2025-48990

NeKernal is a free and open-source operating system stack.

Published Jun 2, 2025 · catalog updated Jun 2, 2025 · NeKernal is a free

Check if you run it

No confirmed exploitation is on record for CVE-2025-48990. EPSS is 0.18%. Act only if a listed version of NeKernal is a free is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (NeKernal is a free).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.6
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.18%
Remediation
Advisory link
Affected products
vendor nekernel-org nekernel = 0.0.2

NeKernal is a free and open-source operating system stack. Version 0.0.2 has a 1-byte heap overflow in , which unconditionally wrote a null terminator at . When equals the size of the destination buffer (256 bytes), that extra write overruns the buffer by one byte. To avoid breaking existing callers or changing the public API, the patch in commit fb7b7f658327f659c6a6da1af151cb389c2ca4ee takes a minimal approach: it simply removes the overflow-causing line without adding bounds checks or altering the function signature.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor nekernel-org nekernel = 0.0.2= 0.0.2

How to fix CVE-2025-48990

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-48990. EPSS is 0.18%. Act only if a listed version of NeKernal is a free is installed.

Which versions are affected?

Compare what you have installed with nekernel-org nekernel = 0.0.2 = 0.0.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.18%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 2, 2025 · EUVD

    Detected

    NeKernal is a free and open-source operating system stack. Version 0.0.2 has a 1-byte heap overflow in , which unconditionally wrote a null terminator at . When equals the size of the destination buffer (256 bytes), that extra write overruns the buffer by one byte. To avoid breaking existing callers or changing the public API, the patch in commit fb7b7f658327f659c6a6da1af151cb389c2ca4ee takes a mi

  2. Jun 2, 2025 · EUVD

    Updated

    NeKernal is a free and open-source operating system stack. Version 0.0.2 has a 1-byte heap overflow in , which unconditionally wrote a null terminator at . When equals the size of the destination buffer (256 bytes), that extra write overruns the buffer by one byte. To avoid breaking existing callers or changing the public API, the patch in commit fb7b7f658327f659c6a6da1af151cb389c2ca4ee takes a mi

Sources

  • CVE.orgVulnerability recordCVE-2025-48990

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-48990

    30-day exploitation probability 0.2%

    first.org
  • EUVDVulnerability recordEUVD-2025-16632

    NeKernal is a free and open-source operating system stack. Version 0.0.2 has a 1-byte heap overflow in , which unconditionally wrote a null terminator at . When equals the size of the destination buffer (256 bytes), that extra write overruns the buffer by one byte. To avoid break

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.