{"id":"UBUNTU-CVE-2026-31973","details":"SAMtools is a program for reading, manipulating and writing bioinformatics file formats. Starting in version 1.17, in the cram-size command, used to write information about how well CRAM files are compressed, a check to see if the `cram_decode_compression_header()` was missing. If the function returned an error, this could lead to a NULL pointer dereference. Exploiting this bug causes a NULL pointer dereference. Typically this will cause the program to crash. Versions 1.23.1, 1.22.2 and 1.21.1 include fixes for this issue. There is no workaround for this issue.","modified":"2026-05-20T16:25:19.555833007Z","published":"2026-03-18T21:16:00Z","upstream":["CVE-2026-31973"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-31973"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-31973"},{"type":"REPORT","url":"https://github.com/samtools/samtools/security/advisories/GHSA-x86f-q6fj-cm43"},{"type":"REPORT","url":"https://github.com/samtools/samtools/commit/06fc2a219b3d7c94d3f412c09f6d1efd51199f2f"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2026/03/18/12"}],"affected":[{"package":{"name":"samtools","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/samtools?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.1.19-1"],"ecosystem_specific":{"binaries":[{"binary_name":"samtools","binary_version":"0.1.19-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31973.json"}},{"package":{"name":"samtools","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/samtools?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.1.19-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.1.19-1ubuntu1","binary_name":"samtools"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31973.json"}},{"package":{"name":"samtools","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/samtools?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.1-1build1","1.5-1build1","1.6-3ubuntu1","1.6-4","1.7-1"],"ecosystem_specific":{"binaries":[{"binary_name":"samtools","binary_version":"1.7-1"},{"binary_version":"1.7-1","binary_name":"samtools-test"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31973.json"}},{"package":{"name":"samtools","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/samtools?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.9-4","1.9-5","1.9-6","1.9-7","1.10-3"],"ecosystem_specific":{"binaries":[{"binary_name":"samtools","binary_version":"1.10-3"},{"binary_version":"1.10-3","binary_name":"samtools-test"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31973.json"}},{"package":{"name":"samtools","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/samtools?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.13-2","1.13-4"],"ecosystem_specific":{"binaries":[{"binary_name":"samtools","binary_version":"1.13-4"},{"binary_name":"samtools-test","binary_version":"1.13-4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31973.json"}},{"package":{"name":"samtools","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/samtools?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.17-1","1.18-1","1.19-1","1.19.2-1","1.19.2-1build1","1.19.2-1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"samtools","binary_version":"1.19.2-1build2"},{"binary_name":"samtools-test","binary_version":"1.19.2-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31973.json"}},{"package":{"name":"samtools","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/samtools?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.21-1"],"ecosystem_specific":{"binaries":[{"binary_name":"samtools","binary_version":"1.21-1"},{"binary_name":"samtools-test","binary_version":"1.21-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31973.json"}},{"package":{"name":"samtools","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/samtools?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.21-1","1.22.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"samtools","binary_version":"1.22.1-1"},{"binary_version":"1.22.1-1","binary_name":"samtools-test"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31973.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}