Bug 2530998 (CVE-2026-87824)

Summary: CVE-2026-87824 com.github.luben/zstd-jni: zstd-jni: Denial of Service (DoS) via out-of-bounds read in Zstd.trainFromBufferDirect
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: amctagga, ant, anujha, aoconnor, asoldano, asyoung, avibelli, bbaranow, bgeorges, bmaxwell, bniver, bstansbe, ccranfor, cescoffi, cmah, dandread, dkreling, dlofthou, ewittman, flucifre, fmariani, fmongiar, gmalinko, gmeno, groman, gsmet, gtanzill, istudens, ivassile, iweiss, janstey, jbuscemi, jhollowa, jmartisk, jnethert, jpechane, jwon, kaycoth, lthon, manderse, mbenjamin, mcarlett, mhackett, mosmerov, msvehla, nipatil, nwallace, olubyans, pantinor, pberan, pdelbell, pesilva, pgallagh, pjindal, pmackay, prichard, probinso, rguimara, rhel-process-autobot, rkubis, rruss, rstancel, rstepani, rsvoboda, sbiarozk, sostapov, sthirugn, tcunning, thjenkin, tqvarnst, vdosoudi, vereddy, watson-tool-maintainers, yfang
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in zstd-jni. Attackers can exploit this by supplying oversized per-sample lengths to the `Zstd.trainFromBufferDirect` function, which fails to validate the samples buffer capacity. This allows for reading past buffer boundaries, leading to out-of-bounds memory access and ultimately causing the Java Virtual Machine (JVM) to terminate, 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:
Embargoed:
Bug Depends On: 2531337, 2531338, 2531339, 2531340    
Bug Blocks:    

Description OSIDB Bzimport 2026-09-09 14:51:32 UTC 
zstd-jni before 1.5.7-14 fails to validate the samples buffer capacity in Zstd.trainFromBufferDirect, allowing attackers to read past buffer boundaries by supplying oversized per-sample lengths. Attackers can trigger out-of-bounds memory access by providing crafted sample length arrays that cause the native implementation to walk past the buffer allocation, resulting in JVM termination.