Description
GNU Tar through 1.34 has a one-byte out-of-bounds read that results in use of uninitialized memory for a conditional jump. Exploitation to change the flow of control has not been demonstrated. The issue occurs in from_header in list.c via a V7 archive in which mtime has approximately 11 whitespace characters.
Affected products
gnu: tar; fedoraproject: fedora
References10
- savannah.gnu.org/bugs/?62387 ExploitVendor Advisory
- savannah.gnu.org/patch/?10307 PatchVendor Advisory
- savannah.gnu.org/bugs/?62387 ExploitVendor Advisory
- savannah.gnu.org/patch/?10307 PatchVendor Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.… Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.… Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.… Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.… Mailing ListThird Party Advisory
- cert-portal.siemens.com/productcert/html/ssa-398330.html
- cert-portal.siemens.com/productcert/html/ssa-806742.html
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 74 · as of 6 November 2026
- CWE
- CWE-125
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.