What is CVE-2018-1000879?

CVE-2018-1000879 is a medium-severity vulnerability in Libarchive, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2018-12-20.

How severe is CVE-2018-1000879?

Medium severity. CVSS v3 base score is 6.5 out of 10.

NULL pointer dereference in Libarchive

CVE-2018-1000879

libarchive version commit 379867ecb330b3a952fb7bfa7bffb7bbd5547205 onwards (release v3.3.0 onwards) contains a CWE-476: NULL Pointer Dereference vulnerability in ACL parser - libarchive/archive_acl.c, archive_acl_from_text_l() that can result in Crash/DoS. This attack appear to be exploitable via the victim must open a specially crafted archive file.

Published 2018-12-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.034 (88.3th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: 0.000

Affected products

Libarchive
Fedoraproject Fedora — versions 28, 29, 30
openSUSE Leap — versions 15.0

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

github.com/libarchive/libarchive/pull/1105/commits/15bf44fd2c1ad0e3fd87048b3fcc… (Patch, Third Party Advisory)
bugs.launchpad.net/ubuntu/+source/libarchive/+bug/1794909 (Patch, Third Party Advisory)
github.com/libarchive/libarchive/pull/1105 (Third Party Advisory)
www.securityfocus.com/bid/106324 (VDB Entry, Third Party Advisory, vdb-entry)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
lists.opensuse.org/opensuse-security-announce/2019-04/msg00055.html (vendor-advisory, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2018-1000879?: CVE-2018-1000879 is a medium-severity vulnerability in Libarchive, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2018-12-20.
How severe is CVE-2018-1000879?: Medium severity. CVSS v3 base score is 6.5 out of 10.