CVE-2019-12900

Python 3.8 and 4 others: Out-of-bounds Write

CVE-2019-12900 is fixed in 15 products on 2 platforms, first by bzip2 1.0.6-8.1ubuntu0.1, released June 18, 2019. 2 other affected products have no fix yet. It is not reported as exploited. Patch Radar priority: High.

HighFixed on 2 platforms
CVSS
9.8
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0798
94th percentile

BZ2_decompress in decompress.c in bzip2 through 1.0.6 has an out-of-bounds write when there are many selectors.

Where it's fixed

ProductFixed inFixReleased
Windows apps
Python 3.10 3.10.3 Python 3.10 3.10.3 Mar 16, 2022
Python 3.9 3.9.13 Python 3.9 3.9.13 May 17, 2022
Linux
bzip2 · RHEL 8 0:1.0.6-28.el8_10 RHSA-2025:0733 Jan 28, 2025
bzip2 · RHEL 9 0:1.0.8-10.el9_5 RHSA-2025:0925 Feb 4, 2025
bzip2 · Ubuntu 18.04.6 LTS (bionic) 1.0.6-8.1ubuntu0.1 bzip2 1.0.6-8.1ubuntu0.1 Jun 18, 2019
bzip2 · almalinux 8 1.0.6-28.el8_10 ALSA-2025:0733 Jan 28, 2025
bzip2 · almalinux 9 1.0.8-10.el9_5 ALSA-2025:0925 Feb 4, 2025
bzip2 · ol 8 0:1.0.6-27.0.1.el8_10 ELSA-2024-8922 Nov 11, 2024
bzip2 · ol 9 0:1.0.8-10.el9_5 ELSA-2025-0925 Feb 3, 2025
bzip2 · rocky 8 0:1.0.6-28.el8_10 RLSA-2025:0733 Feb 13, 2025
bzip2 · rocky 9 0:1.0.8-10.el9_5 RLSA-2025:0925 Mar 17, 2025
bzip2-devel · RHEL 8 0:1.0.6-28.el8_10 RHSA-2025:0733 Jan 28, 2025
bzip2-devel · RHEL 9 0:1.0.8-10.el9_5 RHSA-2025:0925 Feb 4, 2025
bzip2-devel · almalinux 8 1.0.6-28.el8_10 ALSA-2025:0733 Jan 28, 2025
bzip2-devel · almalinux 9 1.0.8-10.el9_5 ALSA-2025:0925 Feb 4, 2025
bzip2-devel · ol 8 0:1.0.6-27.0.1.el8_10 ELSA-2024-8922 Nov 11, 2024
bzip2-devel · ol 9 0:1.0.8-10.el9_5 ELSA-2025-0925 Feb 3, 2025
bzip2-libs · RHEL 8 0:1.0.6-28.el8_10 RHSA-2025:0733 Jan 28, 2025
bzip2-libs · RHEL 9 0:1.0.8-10.el9_5 RHSA-2025:0925 Feb 4, 2025
bzip2-libs · almalinux 8 1.0.6-28.el8_10 ALSA-2025:0733 Jan 28, 2025
bzip2-libs · almalinux 9 1.0.8-10.el9_5 ALSA-2025:0925 Feb 4, 2025
bzip2-libs · ol 8 0:1.0.6-27.0.1.el8_10 ELSA-2024-8922 Nov 11, 2024
bzip2-libs · ol 9 0:1.0.8-10.el9_5 ELSA-2025-0925 Feb 3, 2025
clamav · Ubuntu 18.04.6 LTS (bionic) 0.101.4+dfsg-0ubuntu0.18.04.1 clamav 0.101.4+dfsg-0ubuntu0.18.04.1 Aug 22, 2019
clamav-base · Ubuntu 18.04.6 LTS (bionic) 0.101.4+dfsg-0ubuntu0.18.04.1 clamav-base 0.101.4+dfsg-0ubuntu0.18.04.1 Aug 22, 2019
clamav-daemon · Ubuntu 18.04.6 LTS (bionic) 0.101.4+dfsg-0ubuntu0.18.04.1 clamav-daemon 0.101.4+dfsg-0ubuntu0.18.04.1 Aug 22, 2019
clamav-docs · Ubuntu 18.04.6 LTS (bionic) 0.101.4+dfsg-0ubuntu0.18.04.1 clamav-docs 0.101.4+dfsg-0ubuntu0.18.04.1 Aug 22, 2019
clamav-freshclam · Ubuntu 18.04.6 LTS (bionic) 0.101.4+dfsg-0ubuntu0.18.04.1 clamav-freshclam 0.101.4+dfsg-0ubuntu0.18.04.1 Aug 22, 2019
clamav-milter · Ubuntu 18.04.6 LTS (bionic) 0.101.4+dfsg-0ubuntu0.18.04.1 clamav-milter 0.101.4+dfsg-0ubuntu0.18.04.1 Aug 22, 2019
clamav-testfiles · Ubuntu 18.04.6 LTS (bionic) 0.101.4+dfsg-0ubuntu0.18.04.1 clamav-testfiles 0.101.4+dfsg-0ubuntu0.18.04.1 Aug 22, 2019
clamdscan · Ubuntu 18.04.6 LTS (bionic) 0.101.4+dfsg-0ubuntu0.18.04.1 clamdscan 0.101.4+dfsg-0ubuntu0.18.04.1 Aug 22, 2019
libbz2-1.0 · Ubuntu 18.04.6 LTS (bionic) 1.0.6-8.1ubuntu0.1 libbz2-1.0 1.0.6-8.1ubuntu0.1 Jun 18, 2019
libclamav9 · Ubuntu 18.04.6 LTS (bionic) 0.101.4+dfsg-0ubuntu0.18.04.1 libclamav9 0.101.4+dfsg-0ubuntu0.18.04.1 Aug 22, 2019
No fix yet
Python 3.7 (Windows apps) No fix yet no-fix n/a
Python 3.8 (Windows apps) No fix yet no-fix n/a

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