Libsolv: stack-based buffer overflow in libsolv eddsa pgp signature verification allows denial of service
Priority MEDIUM 40CWE-121Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0082 57th percentileScored 2026-11-07
Fix Fixed libsolv (OpenSUSE): 0.7.38
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| openSUSE | libsolv | 0.6.4 to before 0.7.38 | 0.7.38 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 10 | — | — | Not affected | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | Not affected | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | Not affected | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | Not affected | CNA |
| Red Hat | Red Hat Hardened Images | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | Not affected | CNA |
| Red Hat | Red Hat Satellite 6 | — | — | Not affected | CNA |
| Red Hat | Red Hat Update Infrastructure 4 for Cloud Providers | — | — | Not affected | CNA |
- libsolv VendoropenSUSE Affected 0.6.4 to before 0.7.38 Fixed in 0.7.38 Patch available CNA
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Hardened Images VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Satellite 6 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Update Infrastructure 4 for Cloud Providers VendorRed Hat Affected — Fixed in — Not affected CNA
CPE names CNA · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/a:redhat:enterprise_linux:10 | 10 | — | Red Hat |
| cpe:/o:redhat:rhel_els:7 | 7 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:8 | 8 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:9 | 9 | — | Red Hat |
| cpe:/a:redhat:hummingbird:1 | 1 | — | Red Hat |
| cpe:/a:redhat:openshift:4 | 4 | — | Red Hat |
| cpe:/a:redhat:satellite:6 | 6 | — | Red Hat |
| cpe:/a:redhat:rhui:4::el8 | 4 | — | Red Hat |
- cpe:/a:redhat:enterprise_linux:10 Versions 10 — ·Red Hat
- cpe:/o:redhat:rhel_els:7 Versions 7 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:8 Versions 8 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:9 Versions 9 — ·Red Hat
- cpe:/a:redhat:hummingbird:1 Versions 1 — ·Red Hat
- cpe:/a:redhat:openshift:4 Versions 4 — ·Red Hat
- cpe:/a:redhat:satellite:6 Versions 6 — ·Red Hat
- cpe:/a:redhat:rhui:4::el8 Versions 4 — ·Red Hat
Remediation
- Fix · CNA libsolv (OpenSUSE) Fixed in 0.7.38
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 8 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Hardened Images
- Red Hat OpenShift Container Platform 4
- Red Hat Satellite 6
- Red Hat Update Infrastructure 4 for Cloud Providers
Timeline
- 2026-10-02 Threatist record created from CVE-2026-48863
- 2026-10-03 Alias added: GHSA-p3x5-f8vr-q28x
References
More openSUSE vulnerabilities
- TI-2020-12851 An issue was discovered in SaltStack Salt through 3002. KEVCVSS 3.1CRITICAL 9.8
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- TI-2020-09349 An issue was discovered in SaltStack Salt before 2019.2.4 and 3000 before 3000.2. KEVCVSS 3.1CRITICAL 9.8
- TI-2020-01862 Improper privilege management in Apache Tomcat KEVCVSS 3.1CRITICAL 9.8
- TI-2020-01431 Netlogon Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 10.0
- TI-2016-03560 Unspecified vulnerability in Adobe Flash Player 21.0.0.242 and earlier allows remote… KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-48863 · CVE Program
- CVE-2026-48863 · NVD
- FIRST EPSS
- GHSA-p3x5-f8vr-q28x · GitHub Advisory Database · CC BY 4.0
- CVE-2026-48863 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences