CVE-2026-48863: Stack-based Buffer Overflow in OpenSUSE libsolv
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.
AI Analysis
Technical Summary
CVE-2026-48863 is a stack-based buffer overflow vulnerability in the libsolv library used by OpenSUSE, specifically in version 0.6.4. The vulnerability occurs in the PGP verification component due to improper handling of the length of the EdDSA 's' MPI when copying it into a stack buffer. This can be triggered by a remote attacker crafting a malicious Ed25519 PGP signature with mismatched MPI lengths. Exploitation of this flaw may lead to denial of service conditions in automated package or repository processing workflows. The vulnerability is classified under CWE-121 (Stack-based Buffer Overflow) and has a CVSS v3.1 score of 7.5, indicating high severity. No official patch or remediation level is currently documented in the vendor advisory. The Red Hat advisory linked does not explicitly state patch availability or mitigation steps.
Potential Impact
Successful exploitation of this vulnerability can cause a denial of service by crashing processes that perform automated package or repository processing using the vulnerable libsolv version. There is no indication of confidentiality or integrity impact. The vulnerability is remotely exploitable without authentication and requires no user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory at https://access.redhat.com/security/cve/CVE-2026-48863 for current remediation guidance. Until a patch is available, consider restricting or monitoring the processing of untrusted PGP signatures in automated workflows that use libsolv 0.6.4 to reduce exposure.
CVE-2026-48863: Stack-based Buffer Overflow in OpenSUSE libsolv
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.
CVSS v3.1
Score 7.5high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-48863 is a stack-based buffer overflow vulnerability in the libsolv library used by OpenSUSE, specifically in version 0.6.4. The vulnerability occurs in the PGP verification component due to improper handling of the length of the EdDSA 's' MPI when copying it into a stack buffer. This can be triggered by a remote attacker crafting a malicious Ed25519 PGP signature with mismatched MPI lengths. Exploitation of this flaw may lead to denial of service conditions in automated package or repository processing workflows. The vulnerability is classified under CWE-121 (Stack-based Buffer Overflow) and has a CVSS v3.1 score of 7.5, indicating high severity. No official patch or remediation level is currently documented in the vendor advisory. The Red Hat advisory linked does not explicitly state patch availability or mitigation steps.
Potential Impact
Successful exploitation of this vulnerability can cause a denial of service by crashing processes that perform automated package or repository processing using the vulnerable libsolv version. There is no indication of confidentiality or integrity impact. The vulnerability is remotely exploitable without authentication and requires no user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory at https://access.redhat.com/security/cve/CVE-2026-48863 for current remediation guidance. Until a patch is available, consider restricting or monitoring the processing of untrusted PGP signatures in automated workflows that use libsolv 0.6.4 to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-05-25T20:59:30.305Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-48863","vendor":"Red Hat"}]
Threat ID: 6a582dd568715ace43e68653
Added to database: 07/16/2026, 01:03:17 UTC
Last enriched: 07/23/2026, 22:39:01 UTC
Last updated: 08/16/2026, 00:41:14 UTC
Views: 101
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