CVE-2021-33910

basic/unit-name.c in systemd prior to 246.15, 247.8, 248.5, and 249.1 has a Memory Allocation with an Excessive Size Value (involving strdupa and alloca for a pathname controlled by a local attacker) that results in an operating system crash.

• CWE-770
• CWE-770

• http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.htmlExploit, Third Party Advisory, VDB Entry
• http://www.openwall.com/lists/oss-security/2021/08/04/2Mailing List, Patch, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/08/17/3Mailing List, Patch, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/09/07/3Mailing List, Patch, Third Party Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
• https://github.com/systemd/systemd-stable/commit/4a1c5f34bd3e1daed4490e9d97918e504d19733bPatch, Third Party Advisory
• https://github.com/systemd/systemd-stable/commit/764b74113e36ac5219a4b82a05f311b5a92136cePatch, Third Party Advisory
• https://github.com/systemd/systemd-stable/commit/b00674347337b7531c92fdb65590ab253bb57538Patch, Third Party Advisory
• https://github.com/systemd/systemd-stable/commit/cfd14c65374027b34dbbc4f0551456c5dc2d1f61Patch, Third Party Advisory
• https://github.com/systemd/systemd/commit/b34a4f0e6729de292cb3b0c03c1d48f246ad896bPatch, Third Party Advisory
• https://github.com/systemd/systemd/pull/20256/commits/441e0115646d54f080e5c3bb0ba477c892861ab9Patch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2LSDMHAKI4LGFOCSPXNVVSEWQFAVFWR7/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/42TMJVNYRY65B4QCJICBYOEIVZV3KUYI/
• https://security.gentoo.org/glsa/202107-48Third Party Advisory
• https://security.netapp.com/advisory/ntap-20211104-0008/Third Party Advisory
• https://www.debian.org/security/2021/dsa-4942Third Party Advisory
• https://www.openwall.com/lists/oss-security/2021/07/20/2Exploit, Mailing List, Third Party Advisory
• http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.htmlExploit, Third Party Advisory, VDB Entry
• http://www.openwall.com/lists/oss-security/2021/08/04/2Mailing List, Patch, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/08/17/3Mailing List, Patch, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/09/07/3Mailing List, Patch, Third Party Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
• https://github.com/systemd/systemd-stable/commit/4a1c5f34bd3e1daed4490e9d97918e504d19733bPatch, Third Party Advisory
• https://github.com/systemd/systemd-stable/commit/764b74113e36ac5219a4b82a05f311b5a92136cePatch, Third Party Advisory
• https://github.com/systemd/systemd-stable/commit/b00674347337b7531c92fdb65590ab253bb57538Patch, Third Party Advisory
• https://github.com/systemd/systemd-stable/commit/cfd14c65374027b34dbbc4f0551456c5dc2d1f61Patch, Third Party Advisory
• https://github.com/systemd/systemd/commit/b34a4f0e6729de292cb3b0c03c1d48f246ad896bPatch, Third Party Advisory
• https://github.com/systemd/systemd/pull/20256/commits/441e0115646d54f080e5c3bb0ba477c892861ab9Patch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2LSDMHAKI4LGFOCSPXNVVSEWQFAVFWR7/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/42TMJVNYRY65B4QCJICBYOEIVZV3KUYI/
• https://security.gentoo.org/glsa/202107-48Third Party Advisory
• https://security.netapp.com/advisory/ntap-20211104-0008/Third Party Advisory
• https://www.debian.org/security/2021/dsa-4942Third Party Advisory
• https://www.openwall.com/lists/oss-security/2021/07/20/2Exploit, Mailing List, Third Party Advisory

Published

Jul 20, 2021

Last Modified

Jun 17, 2026

Status

Modified

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