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Vulnerability record · CVE-2019-9923 · published 22 March 2019

CVE-2019-9923: Gnu tar null pointer dereference vulnerability

Gnu · Tar

pax_decode_header in sparse.c in GNU Tar before 1.32 had a NULL pointer dereference when parsing certain archives that have malformed extended headers.

7.5 CVSS 3.1 High EPSS 3.0% · top 13.0% CWE-476 · NULL pointer dereference
7.5CVSS 3.1 base score, v2 5.0
3.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
12References
17 Jun 2026Last modified by NVD

Description

pax_decode_header in sparse.c in GNU Tar before 1.32 had a NULL pointer dereference when parsing certain archives that have malformed extended headers.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://git.savannah.gnu.org/cgit/tar.git/commit/?id=cb07844454d8cc9fb21f53ace75975f91185a120 Mailing ListPatchVendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.html Mailing ListThird Party Advisory
http://savannah.gnu.org/bugs/?55369 Permissions RequiredThird Party Advisory
https://bugs.launchpad.net/ubuntu/+source/tar/+bug/1810241 Issue TrackingPatchThird Party Advisory
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.ap
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.ap
http://git.savannah.gnu.org/cgit/tar.git/commit/?id=cb07844454d8cc9fb21f53ace75975f91185a120 Mailing ListPatchVendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.html Mailing ListThird Party Advisory
http://savannah.gnu.org/bugs/?55369 Permissions RequiredThird Party Advisory
https://bugs.launchpad.net/ubuntu/+source/tar/+bug/1810241 Issue TrackingPatchThird Party Advisory
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.ap
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.ap

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Source: NIST National Vulnerability Database (record CVE-2019-9923), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.