CVE-2025-58183

tar.Reader does not set a maximum size on the number of sparse region data blocks in GNU tar pax 1.0 sparse files. A maliciously-crafted archive containing a large number of sparse regions can cause a Reader to read an unbounded amount of data from the archive into memory. When reading from a compressed source, a small compressed input can result in large allocations.

CVSS 3.1

4.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

EPSS

0.4% chance of exploitation in the next 30 days; higher than 38% of CVEs (scores of 2026-10-25)

Published

2025-10-29

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

Packages (OSV)

References

• https://go.dev/cl/709861
• https://go.dev/issue/75677
• https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bI
• https://pkg.go.dev/vuln/GO-2025-4014
• http://www.openwall.com/lists/oss-security/2025/10/08/1

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