Bug 2558005 (CVE-2026-114095)

Summary: CVE-2026-114095 dulwich: dulwich: Denial of Service via self-referential packfile delta objects
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, dschmidt, gbenhaim, ikhan, jdelft, jdobes, jlanda, jmitchel, jupierce, kgaikwad, kshier, lgarciaa, mbiarnes, niyer, orabin, ppalepu, ppostler, prdhamdh, rbobbitt, rhel-process-autobot, sghai, sidsharm, simaishi, stcannon, suppawar, twaugh, vlaad, watson-tool-maintainers, yguenane
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in dulwich. When resolving Git packfile objects, the delta offset calculation fails to properly validate self-referential entries. An attacker can exploit this issue by providing a specially crafted Git packfile during repository operations such as clone or fetch, triggering infinite recursion. This leads to excessive CPU consumption, causing the application to hang or crash and resulting in a Denial of Service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-10-21 00:59:30 UTC
Dulwich before 1.2.9 contains a denial of service vulnerability in Pack.resolve_object that allows attackers to cause infinite recursion via self-referential OFS_DELTA objects. Attackers can supply a malicious packfile with an OFS_DELTA delta_offset of 0 to exhaust CPU during clone, fetch, or cat-file operations.