CVE-2026-48863

highCVSS 7.5covered by 2 sourcesfirst seen 2026-07-14

A flaw was found in libsolv. A stack-based buffer overflow vulnerability exists in the PGP verification component due to incorrect length handling when copying EdDSA 's' MPI into a stack buffer. A remote attacker could craft a malicious Ed25519 PGP signature with mismatched MPI lengths. Processing this crafted signature could lead to a denial of service in automated package or repository processing workflows.

CSIRTS triage

What: A stack-based buffer overflow in eddsa pgp signature verification allows denial of service.
Who is affected: Users of Libsolv are affected.
Urgency: Remediation is high urgency due to the potential for exploitation.
Action: Update Libsolv to the latest version.

AI-assisted analysis generated from the source advisory — verify against the original.

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Exploitation outlook

Low exploitation risk0.47% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all EPSS-scored CVEs.

Advisory coverage (2)

highCVE-2026-48863: A flaw was found in libsolv. A stack-based buffer overflow vulnerability exists in the PGP ver…nvd · 2026-07-16
highCVE-2026-48863: Libsolv: stack-based buffer overflow in libsolv eddsa pgp signature verification allows denial…msrc · 2026-07-14

External references

NVD record for CVE-2026-48863

CVE.org record

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