Bug 2456332 (CVE-2026-32288)

Summary: CVE-2026-32288 archive/tar: golang: Go's archive/tar package: Denial of Service via maliciously-crafted archive
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: aazores, akoudelk, alcohan, amctagga, anjoseph, anpicker, ansmith, aoconnor, asatyam, bbrownin, bdettelb, bniver, bparees, cmah, dhanak, diagrawa, doconnor, drosa, dsimansk, dymurray, eaguilar, ebaron, eborisov, eglynn, fdeutsch, flucifre, gmeno, gparvin, groman, hasun, ibolton, jbalunas, jcantril, jfula, jjoyce, jkoehler, jmatthew, jmontleo, jolong, jowilson, jprabhak, jpretori, jschluet, kingland, kverlaen, lball, lbragsta, lchilton, lgamliel, lhh, lphiri, manissin, mbenjamin, mburns, mgarciac, mhackett, mnovotny, mwringe, ngough, nyancey, ometelka, oramraz, pahickey, peholase, pgaikwad, pjindal, ptisnovs, rfreiman, rhaigner, rhel-process-autobot, rjohnson, rojacob, sabiswas, sausingh, sdawley, sfeifer, slucidi, smullick, sostapov, sseago, stirabos, syedriko, thason, vereddy, veshanka, watson-tool-maintainers, wenshen, whayutin, wtam, xdharmai
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in Go's `archive/tar` package. A remote attacker could exploit this vulnerability by providing a maliciously-crafted archive file. When the `tar.Reader` processes an archive containing a large number of sparse regions in the "old GNU sparse map" format, it can lead to unbounded memory allocation. This can result in a Denial of Service (DoS) condition, making the affected application unresponsive.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2456709    
Bug Blocks:    

Description OSIDB Bzimport 2026-04-08 02:01:21 UTC 
tar.Reader can allocate an unbounded amount of memory when reading a maliciously-crafted archive containing a large number of sparse regions encoded in the "old GNU sparse map" format.