Service interruption via leaked discarded quality values
Published Apr 24, 2025 · Updated Jul 25, 2026
Memory leak in GNOME libsoup before 3.6.3 allows context-dependent attackers to exhaust application memory through crafted quality-list headers. soup_header_parse_quality_list() freed only temporary GSList nodes, leaving discarded q=0 element strings allocated when the caller did not request the unacceptable list. Reachability requires an application to parse attacker-controlled quality-list headers repeatedly, progressively consuming memory until that process is interrupted.
Summary
What happened
Memory leak in GNOME libsoup before 3.6.3 allows context-dependent attackers to exhaust application memory through crafted quality-list headers. soup_header_parse_quality_list() freed only temporary GSList nodes, leaving discarded q=0 element strings allocated when the caller did not request the unacceptable list. Reachability requires an application to parse attacker-controlled quality-list headers repeatedly, progressively consuming memory until that process is interrupted.
The record
- CVE
- CVE-2025-46420
- Published
- Apr 24, 2025
- Updated
- Jul 25, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
- Classifications
- CWE-401, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 24, 2025CVE publishedPublication date reported by the CVE source.
- Jul 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
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
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo