{"id":"CVE-2021-3623","aliases":["DEBIAN-CVE-2021-3623","EUVD-2021-26926","GHSA-6527-9qhc-39j4","MGASA-2021-0590","OESA-2022-1695","SUSE-SU-2022:4457-1","UBUNTU-CVE-2021-3623","openSUSE-SU-2024:12445-1"],"status":"published","title":"A flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets...","description":"A flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets containing illegal values and may lead to an out-of-bounds access when the volatile state of the TPM 2 is marshalled/written or unmarshalled/read. The highest threat from this vulnerability is to system availability.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00321,"percentile":0.25421,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-787"],"published":"2021-12-30T16:41:51Z","modified":"2026-10-23T18:03:16Z","fixes":[{"ecosystem":"Debian:12","package":"libtpms","fixed_in":["0.9.1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"libtpms","fixed_in":["0.9.1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"libtpms","fixed_in":["0.9.1-1"],"sources":["osv"]},{"ecosystem":"SUSE:Linux Enterprise Micro 5.3","package":"libtpms","fixed_in":["0.8.2-150300.3.6.1"],"sources":["osv"]},{"ecosystem":"SUSE:Linux Enterprise Module for Server Applications 15 SP3","package":"libtpms","fixed_in":["0.8.2-150300.3.6.1"],"sources":["osv"]},{"ecosystem":"SUSE:Linux Enterprise Module for Server Applications 15 SP4","package":"libtpms","fixed_in":["0.8.2-150300.3.6.1"],"sources":["osv"]},{"ecosystem":"SUSE:Linux Enterprise Micro 5.1","package":"libtpms","fixed_in":["0.8.2-150300.3.6.1"],"sources":["osv"]},{"ecosystem":"SUSE:Linux Enterprise Micro 5.2","package":"libtpms","fixed_in":["0.8.2-150300.3.6.1"],"sources":["osv"]},{"ecosystem":"openSUSE:Leap Micro 5.2","package":"libtpms","fixed_in":["0.8.2-150300.3.6.1"],"sources":["osv"]},{"ecosystem":"openSUSE:Leap Micro 5.3","package":"libtpms","fixed_in":["0.8.2-150300.3.6.1"],"sources":["osv"]},{"ecosystem":"openSUSE:Leap 15.3","package":"libtpms","fixed_in":["0.8.2-150300.3.6.1"],"sources":["osv"]},{"ecosystem":"openSUSE:Leap 15.4","package":"libtpms","fixed_in":["0.8.2-150300.3.6.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"libtpms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"libtpms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"libtpms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.1-1"}]}]},{"source":"osv","ecosystem":"Mageia:8","package":"libtpms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.1-1.mga8"}]}],"bundled":4},{"source":"osv","ecosystem":"Mageia:8","package":"swtpm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.0-5.mga8"}]}],"bundled":4},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP1","package":"libtpms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.3-7.oe1"}]}],"bundled":2},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP3","package":"libtpms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.3-7.oe1"}]}],"bundled":2},{"source":"osv","ecosystem":"openEuler:22.03-LTS","package":"libtpms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.3-7.oe2203"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Micro 5.3","package":"libtpms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.2-150300.3.6.1"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Server Applications 15 SP3","package":"libtpms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.2-150300.3.6.1"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Server Applications 15 SP4","package":"libtpms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.2-150300.3.6.1"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Micro 5.1","package":"libtpms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.2-150300.3.6.1"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Micro 5.2","package":"libtpms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.2-150300.3.6.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Leap Micro 5.2","package":"libtpms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.2-150300.3.6.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Leap Micro 5.3","package":"libtpms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.2-150300.3.6.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Leap 15.3","package":"libtpms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.2-150300.3.6.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Leap 15.4","package":"libtpms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.2-150300.3.6.1"}]}]}],"products":[{"vendor":"fedoraproject","product":"fedora"},{"vendor":"libtpms_project","product":"libtpms"},{"vendor":"redhat","product":"enterprise_linux"},{"vendor":"stefanberger","product":"libtpms"}],"references":[{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7KZSYMTE7Z4BBEZUWO2DIMQDWMGEP46/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1976806","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Patch","Third Party Advisory","fix"]},{"url":"https://github.com/stefanberger/libtpms/pull/223","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","report"]},{"url":"https://github.com/stefanberger/libtpms/commit/2f30d62","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://github.com/stefanberger/libtpms/commit/7981d9a","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://github.com/stefanberger/libtpms/commit/2e6173c","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3623","tags":["advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z7KZSYMTE7Z4BBEZUWO2DIMQDWMGEP46/"},{"url":"https://github.com/advisories/GHSA-6527-9qhc-39j4"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-3623","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2021-0590.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=28882","tags":["report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NUCZX4S53TUNTSGTCRDNOQZV2V2RI4RJ/","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/46YMIRHQHNKPCVNRVW4W27MFQQU7ZHHV/","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/Z7KZSYMTE7Z4BBEZUWO2DIMQDWMGEP46/","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/DZI42OR3JUEGWRKEVCOHL2FPTJVYCYBT/","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/7UCZ7AV2UKWYYCNZ2NLLXW7QYCX7K337/","tags":["web"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/75RD2O2OFCMWPCMY5QMSZRNV5PG5BTS6/","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/YVJSXDXD44WDR4VA2XL33IZDJTBGRXP7/","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/7E3B6T5RBDKAWETDTW3WPORY3NK5IR46/","tags":["web"]},{"url":"https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1695","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3746","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2022/suse-su-20224457-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1187767","tags":["report"]},{"url":"https://bugzilla.suse.com/1204556","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2021-3623","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2021-3623","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-3623","tags":["report"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-3623","description":"A flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets containing illegal values and may lead to an out-of-bounds access when the volatile state of the TPM 2 is marshalled/written or unmarshalled/read. The highest threat from this vulnerability is to system availability.","status":"published","published":"2022-03-02T22:02:36Z","modified":"2024-08-03T17:01:08.325Z","cwes":["CWE-787"],"updated_at":"2026-11-02T14:33:04.020035Z"}],"euvd":[{"id":"EUVD-2021-26926","description":"A flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets containing illegal values and may lead to an out-of-bounds access when the volatile state of the TPM 2 is marshalled/written or unmarshalled/read. The highest threat from this vulnerability is to system availability.","status":"published","published":"2022-03-02T22:02:36Z","modified":"2024-08-03T17:01:08Z","updated_at":"2026-11-03T03:25:11.953192Z"}],"ghsa":[{"id":"GHSA-6527-9qhc-39j4","title":"A flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets...","description":"A flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets containing illegal values and may lead to an out-of-bounds access when the volatile state of the TPM 2 is marshalled/written or unmarshalled/read. The highest threat from this vulnerability is to system availability.","status":"published","published":"2022-03-04T00:00:22Z","modified":"2023-02-01T05:07:18Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","level":"high"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:50:31.141675Z"}],"nvd":[{"id":"CVE-2021-3623","description":"A flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets containing illegal values and may lead to an out-of-bounds access when the volatile state of the TPM 2 is marshalled/written or unmarshalled/read. The highest threat from this vulnerability is to system availability.","status":"published","published":"2022-03-02T23:15:08.623Z","modified":"2026-06-17T04:05:27.637Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":3.6,"vector":"AV:L/AC:L/Au:N/C:P/I:N/A:P","level":"low","assessor":"primary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:07:05.198719Z"}],"osv":[{"id":"CVE-2021-3623","description":"A flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets containing illegal values and may lead to an out-of-bounds access when the volatile state of the TPM 2 is marshalled/written or unmarshalled/read. The highest threat from this vulnerability is to system availability.","status":"published","published":"2022-03-02T23:15:08.623Z","modified":"2026-10-20T10:54:47.567052535Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:20.434873Z"},{"id":"DEBIAN-CVE-2021-3623","description":"A flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets containing illegal values and may lead to an out-of-bounds access when the volatile state of the TPM 2 is marshalled/written or unmarshalled/read. The highest threat from this vulnerability is to system availability.","status":"published","published":"2022-03-02T23:15:08.623Z","modified":"2026-10-23T18:03:16.613369035Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:35.233346Z"},{"id":"OESA-2022-1695","title":"libtpms security update","description":"A library providing TPM functionality for VMs. Targeted for integration into Qemu.\r\n\r\nSecurity Fix(es):\r\n\r\nA flaw was found in the libtpms code that may cause access beyond the boundary of internal buffers. The vulnerability is triggered by specially-crafted TPM2 command packets that then trigger the issue when the state of the TPM2\u0026apos;s volatile state is written. The highest threat from this vulnerability is to system availability. This issue affects libtpms versions before 0.8.5, before 0.7.9 and before 0.6.6.(CVE-2021-3746)\r\n\r\nA flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets containing illegal values and may lead to an out-of-bounds access when the volatile state of the TPM 2 is marshalled/written or unmarshalled/read. The highest threat from this vulnerability is to system availability.(CVE-2021-3623)","status":"published","published":"2022-06-02T11:04:58Z","modified":"2026-08-18T01:16:41.265873789Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:39.528805Z"},{"id":"UBUNTU-CVE-2021-3623","description":"A flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets containing illegal values and may lead to an out-of-bounds access when the volatile state of the TPM 2 is marshalled/written or unmarshalled/read. The highest threat from this vulnerability is to system availability.","status":"withdrawn","published":"2022-03-02T23:15:00Z","modified":"2025-07-16T06:30:48.204573Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:27.870979Z"},{"id":"MGASA-2021-0590","title":"Updated libtpms/swtpm packages fix security vulnerability","description":"CryptSym: fix AES output IV (CVE-2021-3505).\nFixed a context save and suspend/resume problem when public keys are\nloaded.\nReset too large size indicators in TPM2B to avoid access beyond buffer\n(CVE-2021-3623)\nRestore original value in buffer if unmarshalled one was illegal\nFixed out-of-bounds access via specially crafted TPM 2 command packets\n(CVE-2021-3746)\nMarshal event sequence objects' hash state\n","status":"published","published":"2021-12-30T16:41:51Z","modified":"2026-04-16T04:42:15.129626592Z","updated_at":"2026-11-02T15:49:41.849028Z"},{"id":"openSUSE-SU-2024:12445-1","title":"libtpms-devel-0.9.3-2.1 on GA media","description":"These are all security issues fixed in the libtpms-devel-0.9.3-2.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:09:08.854569Z","updated_at":"2026-11-02T16:58:35.751245Z"},{"id":"SUSE-SU-2022:4457-1","title":"Security update for libtpms","description":"This update for libtpms fixes the following issues:\n\n- CVE-2021-3623: Fixed out-of-bounds access when trying to resume the\n  state of the vTPM (bsc#1187767)\n","status":"published","published":"2022-12-13T12:11:01Z","modified":"2025-05-02T04:31:38.815186Z","updated_at":"2026-11-02T15:53:51.853735Z"}]}}