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CVE-2018-20482

4.7 medium Modified
NVD · CVE.org

GNU Tar through 1.30, when --sparse is used, mishandles file shrinkage during read access, which allows local users to cause a denial of service (infinite read loop in sparse_dump_region in sparse.c) by modifying a file that is supposed to be archived by a different user's process (e.g., a system backup running as root).

Fix

Patch, vendor advisory and mitigation references on NVD 6

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 4.7 · gnu, debian, opensuseNVD modified 2026-10-14 07:16

Affected (CPE criteria) 4

  • cpe:2.3:a:gnu:tar:*:*:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
  • cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*

References 21