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CVE-2026-48863

Libsolv: stack-based buffer overflow in libsolv eddsa pgp signature verification allows denial of service

Published: Jul 16, 2026Updated: Jul 18, 2026 Sources: CVE List NVDCWE-121
7.5HIGH
NVD MITRE
EPSS Score
0.5%
Top 62.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-121

Affected Products

Red Hat
commercial·US
Red Hat Enterprise Linux 10On-premOS
Operating Systems / linux-distro
Red Hat Hardened ImagesOn-premOS
Operating Systems / linux-distro
Red Hat OpenShift Container Platform 4SaaSSaaS Service
Cloud & SaaS / container-orchestration
Red Hat Satellite 6On-premOS
Operating Systems / linux-distro
Red Hat Update Infrastructure 4 for Cloud ProvidersOn-prem
Operating Systems / linux-distro
OpenSUSE
oss-project·DE
libsolvOn-prem
Operating Systems / linux-distro
and 3 more affected products View all →

Exploitability

Workaround Available
Is your org exposed to CVE-2026-48863?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://access.redhat.com/security/cve/CVE-2026-48863
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2460975
bugzilla.redhat.com
https://github.com/openSUSE/libsolv/commit/44f8c085045b1f771641091bbb2b810d12cff9e8#diff-309f245ec9b669ec78b8159c39e6f50130b4d4a0448f742685f7833d04bc4caaR592
github.com
and 1 more references View all →

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