Bug 2520124 (CVE-2026-76956)
| Summary: | CVE-2026-76956 libexpat: libexpat: Denial of Service via hash flooding attack with crafted XML | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | akhatavk, aos-team-art-private, asdas, crizzo, dpaolell, gotiwari, gtanzill, jbuscemi, jdelft, jhorak, jupierce, kshier, lgarciaa, mbiarnes, mvyas, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, stcannon, suppawar, teagle, vlaad, watson-tool-maintainers, yguenane |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in libexpat. This vulnerability arises from the software misinterpreting a return code, leading to insufficient randomness (entropy) for hash functions. A remote attacker could exploit this by sending specially crafted XML content, triggering hash flooding attacks. This can result in a denial of service (DoS), making the affected system or application unavailable to legitimate users.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2524647 | ||
| Bug Blocks: | |||
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Description
OSIDB Bzimport
2026-08-20 04:41:17 UTC
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