CVE-2026-48863 Libsolv: stack-based buffer overflow in libsolv eddsa pgp signature verification allows denial of service
A stack-based buffer overflow in libsolv's PGP verification allows remote attackers to cause denial of service via crafted Ed25519 signatures.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-48863?
CVE-2026-48863 is a high-severity memory corruption vulnerability in OpenSUSE Red Hat Enterprise Linux 10, published on 16 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-121
Which versions are affected by CVE-2026-48863?
How do I fix CVE-2026-48863?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-48863 being exploited?
There is no known exploitation of CVE-2026-48863 in the wild and no public exploit code.
Sources
Also known as AZL-92388, DEBIAN-CVE-2026-48863, GHSA-p3x5-f8vr-q28x, OESA-2026-2635, OESA-2026-2636, OESA-2026-2637 and 1 more.