CVE-2026-48863Network attack vectorHinoki check available

Service crash via mismatched EdDSA MPI lengths

Published Jul 16, 2026 · Updated Jul 16, 2026

Stack-based buffer overflow in OpenSUSE libsolv 0.6.4 through 0.7.37 allows remote attackers to crash signature-processing consumers. solv_pgpvrfy() positions the EdDSA s MPI using slen but copies it using rlen, so mismatched lengths write past the 64-byte signature buffer. Reachability requires ENABLE_PGPVRFY, Ed25519 support, and a consumer that processes the crafted signature; only a service-interrupting crash is demonstrated.

CVSS severity7.5
High
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stack-based buffer overflow in OpenSUSE libsolv 0.6.4 through 0.7.37 allows remote attackers to crash signature-processing consumers. solv_pgpvrfy() positions the EdDSA s MPI using slen but copies it using rlen, so mismatched lengths write past the 64-byte signature buffer. Reachability requires ENABLE_PGPVRFY, Ed25519 support, and a consumer that processes the crafted signature; only a service-interrupting crash is demonstrated.

The record

CVE
CVE-2026-48863
Published
Jul 16, 2026
Updated
Jul 16, 2026
Vendor
OpenSUSE
Product
libsolv
Classifications
CWE-121, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.6.4 <0.7.38

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenSUSE · libsolvversion=0.6.4 <0.7.38

Published CVSS scores

7.5Red Hat, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5redhat-SADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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