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Fencer Vulns
high 7.5

CVE-2026-48863 json

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

published 2026-07-16 3 mo ago modified 2026-11-04 4 d ago also EUVD-2026-44842

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

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.

Patch / fix

  • OpenSUSE libsolv 0.7.38
  • libsolv Debian 14 0.7.38-1

debian advisories DEBIAN-CVE-2026-48863

  • zypper SLES 15 SP4-LTSS, SLE Micro 5.4, SLE Micro 5.3 +2 more 1.14.98-150400.3.104.1
  • libsolv SLES 15 SP4-LTSS, SLE Micro 5.4, SLE Micro 5.3 +3 more 0.7.39-150400.3.46.1
  • libzypp SLES 15 SP4-LTSS, SLE Micro 5.4, SLE Micro 5.3 +3 more 17.38.13-150400.3.158.1
  • libsolv SLES 15 SP6-LTSS, SLE Installer Updates 15 SP6 0.7.39-150600.8.24.1
  • libzypp SLES 15 SP6-LTSS, SLE Installer Updates 15 SP6 17.38.13-150600.3.92.1
  • zypper SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +2 more 1.14.98-150500.6.45.1
  • libsolv SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +3 more 0.7.39-150500.6.17.1
  • libzypp SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +3 more 17.38.13-150500.6.74.1

suse advisories SUSE-SU-2026:2674-1SUSE-SU-2026:2590-1SUSE-SU-2026:2575-1SUSE-SU-2026:2531-1SUSE-SU-2026:22172-1SUSE-SU-2026:22221-1

  • libsolv openSUSE Leap 16.0 0.7.39-160000.1.1
  • zypper openSUSE Leap 16.0 1.14.98-160000.1.1
  • libzypp openSUSE Leap 16.0 17.38.13-160000.1.1
  • libsolv openSUSE Tumbleweed 0.7.38-1.1

opensuse advisories openSUSE-SU-2026:21096-1openSUSE-SU-2026:10895-1

  • libsolv Azure Linux 3.0 0.7.28-5

azure linux advisories AZL-92388

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-48863 updated cvss 7.5

libsolv: Stack-based buffer overflow in libsolv EdDSA PGP signature verification allows denial of service

  • Red Hat Enterprise Linux 7 libsolv, libsolv-demo, python2-solv, libsolv-tools Red Hat Enterprise Linux 8 libsolv, python3-solv, libsolv-tools Red Hat Enterprise Linux 9 libsolv, python3-solv, libsolv-tools Red Hat Enterprise Linux 10 libsolv Red Hat Hardened Images libsolv Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    +2 more products
    Red Hat Satellite 6 libsolv, python2-solv, python3-solv Red Hat Update Infrastructure 4 for Cloud Providers libsolv
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.82% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • OpenSUSE libsolv
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat Satellite 6
  • Red Hat Red Hat Update Infrastructure 4 for Cloud Providers

Classification

Weakness
  • CWE-121 Stack-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.