PT-2025-23502 · Nekernal · Nekernal

0Xf00Sec · Published 2025-06-02 · Updated 2025-06-02 · CVE-2025-48990

Positive Technologies (AI Summary)

CVSS v4.0

8.6

High

Base vector

AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions NeKernal version 0.0.2

Description NeKernal is a free and open-source operating system stack. It has a 1-byte heap overflow in the rt copy memory function, which unconditionally writes a null terminator at dst[len]. When len equals the size of the destination buffer, the extra write overruns the buffer by one byte. The issue was fixed in a commit without adding bounds checks or altering the function signature.

Recommendations For NeKernal version 0.0.2, consider applying the patch from commit fb7b7f658327f659c6a6da1af151cb389c2ca4ee to remove the overflow-causing line in the rt copy memory function. As a temporary workaround, consider restricting the use of the rt copy memory function until the patch is applied.

Exploit

Fix

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2025-48990

GHSA-JVVH-FP57-2P32

Affected Products

Nekernal

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/48xxx/CVE-2025-48990.json · Exploit
• https://osv.dev/vulnerability/CVE-2025-48990 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-48990 · Security Note
• https://github.com/nekernel-org/nekernel/security/advisories/GHSA-jvvh-fp57-2p32 · Note
• https://github.com/nekernel-org/nekernel/commit/fb7b7f658327f659c6a6da1af151cb389c2ca4ee · Note
• https://t.me/cvetracker/25170 · Telegram Post
• https://t.me/cvenotify/124335 · Telegram Post
• https://t.me/latest_high_impact_cve/2516 · Telegram Post
• https://twitter.com/CveFindCom/status/1929503482899226642 · Twitter Post
• https://twitter.com/CVEnew/status/1929503452897677793 · Twitter Post
• https://twitter.com/VulmonFeeds/status/1929532613510787442 · Twitter Post