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.
Fix
Patch, vendor advisory and mitigation references on NVD 4
- https://savannah.gnu.org/bugs/?62387 Exploit, Vendor Advisory
- https://savannah.gnu.org/patch/?10307 Patch, Vendor Advisory
- https://savannah.gnu.org/bugs/?62387 Exploit, Vendor Advisory
- https://savannah.gnu.org/patch/?10307 Patch, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.5 · gnu, fedoraprojectNVD modified 2026-10-14 19:16
Affected (CPE criteria) 3
cpe:2.3:a:gnu:tar:*:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
References 10
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CRY7VEL4AIG3GLIEVCTOXRZNSVYDYYUD/ Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X5VQYCO52Z7GAVCLRYUITN7KXHLRZQS4/ Mailing List, Third Party Advisory
- https://savannah.gnu.org/bugs/?62387 Exploit, Vendor Advisory
- https://savannah.gnu.org/patch/?10307 Patch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CRY7VEL4AIG3GLIEVCTOXRZNSVYDYYUD/ Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X5VQYCO52Z7GAVCLRYUITN7KXHLRZQS4/ Mailing List, Third Party Advisory
- https://savannah.gnu.org/bugs/?62387 Exploit, Vendor Advisory
- https://savannah.gnu.org/patch/?10307 Patch, Vendor Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-806742.html