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    CVE-2019-9923

    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.

    Published:Jan 2, 2019
    Last Modified:Aug 6, 2025
    EPS:Mar 22, 2019
    EPSS Score:0.00408
    CVSS Score:7.5

    Affected Products

    Vendor
    Gnu
    Product
    Tar
    Vendor
    Opensuse
    Product
    Leap

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-18508 (CVSS 4.4) — A flaw was found in GNU tar. When extracting an archive with the --one-top-level option, hardlink targets are …
    CVE-2026-18477 (CVSS 4.4) — A TOCTOU (Time-of-Check Time-of-Use) vulnerability in GNU tar's incremental dumpdir 'X' rename handling allows…
    CVE-2026-5704 (CVSS 5) — A flaw was found in tar. A remote attacker could exploit this vulnerability by crafting a malicious archive, l…
    CVE-2025-45582 (CVSS 4.1) — GNU Tar through 1.35 allows file overwrite via directory traversal in crafted TAR archives, with a certain two…
    CVE-2023-39804 (CVSS 6.2) — In GNU tar before 1.35, mishandled extension attributes in a PAX archive can lead to an application crash in x…
    CVE-2022-48303 (CVSS 5.5) — GNU Tar through 1.34 has a one-byte out-of-bounds read that results in use of uninitialized memory for a condi…
    CVE-2021-20193 (CVSS 3.3) — A flaw was found in the src/list.c of tar 1.33 and earlier. This flaw allows an attacker who can submit a craf…
    CVE-2018-20482 (CVSS 4.7) — GNU Tar through 1.30, when --sparse is used, mishandles file shrinkage during read access, which allows local …
    CVE-2016-6321 (CVSS 7.5) — Directory traversal vulnerability in the safer_name_suffix function in GNU tar 1.14 through 1.29 might allow r…
    CVE-2010-0624 (CVSS 6.8) — Heap-based buffer overflow in the rmt_read__ function in lib/rtapelib.c in the rmt client functionality in GNU…

    References

    http://git.savannah.gnu.org/cgit/tar.git/commit/?id=cb07844454d8cc9fb21f53ace75975f91185a120
    http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.html
    http://savannah.gnu.org/bugs/?55369
    https://bugs.launchpad.net/ubuntu/+source/tar/+bug/1810241
    https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
    https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
    http://git.savannah.gnu.org/cgit/tar.git/commit/?id=cb07844454d8cc9fb21f53ace75975f91185a120
    http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.html
    http://savannah.gnu.org/bugs/?55369
    https://bugs.launchpad.net/ubuntu/+source/tar/+bug/1810241
    https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
    https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High