CVE-2025-58183

MEDIUM4.3

Unbounded allocation when parsing GNU sparse map in archive/tar

Published Oct 29, 2025

Modified 4 months ago

Details

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.

References

WEB

http://www.openwall.com/lists/oss-security/2025/10/08/1

WEB

https://go.dev/cl/709861

WEB

https://go.dev/issue/75677

WEB

https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bI

WEB

https://pkg.go.dev/vuln/GO-2025-4014

ADVISORY