{"id":"CVE-2021-43267","aliases":["A-205243414","ALSA-2021:4647","AZL-6603","BELL-CVE-2021-43267","DEBIAN-CVE-2021-43267","EUVD-2021-30211","GHSA-c22h-4v9p-5cx2","MGASA-2021-0507","MGASA-2021-0508","PUB-A-205243414","RHSA-2021:4644","RHSA-2021:4645","RHSA-2021:4646","RHSA-2021:4647","RHSA-2021:4648","RHSA-2021:4650","RHSA-2021:4750","RLSA-2021:4646","RLSA-2021:4647","UBUNTU-CVE-2021-43267","USN-5165-1","USN-5207-1","USN-5208-1","USN-5218-1"],"status":"published","title":"An issue was discovered in net/tipc/crypto.c in the Linux kernel before 5.14.16. The Transparent...","description":"An issue was discovered in net/tipc/crypto.c in the Linux kernel before 5.14.16. 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The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.","status":"published","published":"2021-11-02T23:15:07Z","modified":"2026-04-21T04:37:45.760473Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:28:08.354547Z"},{"id":"BELL-CVE-2021-43267","title":"CVE-2021-43267 does not affect BellSoft software","status":"withdrawn","published":"2021-11-02T23:15:00Z","modified":"2026-01-26T10:04:51.394126Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:28:16.5265Z"},{"id":"CVE-2021-43267","description":"An issue was discovered in net/tipc/crypto.c in the Linux kernel before 5.14.16. The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.","status":"published","published":"2021-11-02T23:15:07.487Z","modified":"2026-04-16T04:32:06.926900111Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:21.877444Z"},{"id":"DEBIAN-CVE-2021-43267","description":"An issue was discovered in net/tipc/crypto.c in the Linux kernel before 5.14.16. The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.","status":"published","published":"2021-11-02T23:15:07.487Z","modified":"2026-10-23T18:04:16.162159216Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:35.799676Z"},{"id":"RHSA-2021:4644","title":"Red Hat Security Advisory: kpatch-patch security update","status":"published","published":"2024-09-13T17:30:02Z","modified":"2026-06-29T10:38:16Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.077222Z"},{"id":"RHSA-2021:4645","title":"Red Hat Security Advisory: kpatch-patch security update","status":"published","published":"2024-09-13T17:29:41Z","modified":"2026-06-29T10:38:17Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.077222Z"},{"id":"RHSA-2021:4646","title":"Red Hat Security Advisory: kernel-rt security and bug fix update","status":"published","published":"2024-09-13T22:47:00Z","modified":"2026-06-29T10:38:17Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.077222Z"},{"id":"RHSA-2021:4647","title":"Red Hat Security Advisory: kernel security update","status":"published","published":"2024-09-13T22:46:53Z","modified":"2026-06-29T10:38:18Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.077222Z"},{"id":"RHSA-2021:4648","title":"Red Hat Security Advisory: kernel-rt security and bug fix update","status":"published","published":"2024-09-13T22:46:45Z","modified":"2026-06-29T10:38:18Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.077222Z"},{"id":"RHSA-2021:4650","title":"Red Hat Security Advisory: kernel security, bug fix, and enhancement update","status":"published","published":"2024-09-13T22:46:17Z","modified":"2026-06-29T10:38:19Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.077222Z"},{"id":"RHSA-2021:4750","title":"Red Hat Security Advisory: Red Hat Virtualization Host security and bug fix update [ovirt-4.4.9] 0-day","status":"published","published":"2024-09-16T06:25:30Z","modified":"2026-06-29T10:38:27Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.077222Z"},{"id":"RLSA-2021:4646","title":"Important: kernel-rt security and bug fix update","description":"The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es):\n\n* kernel: Insufficient validation of user-supplied sizes for the MSG_CRYPTO message type (CVE-2021-43267)\n\n* kernel: timer tree corruption leads to missing wakeup and system freeze (CVE-2021-20317)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nBug Fix(es):\n\n* kernel-rt: update RT source tree to the Rocky Linux-8.5.z source tree (BZ#2020036)","status":"published","published":"2021-11-15T09:56:17Z","modified":"2026-02-04T10:45:06.452876Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:23.969672Z"},{"id":"RLSA-2021:4647","title":"Important: kernel security update","description":"The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: Insufficient validation of user-supplied sizes for the MSG_CRYPTO message type (CVE-2021-43267)\n\n* kernel: timer tree corruption leads to missing wakeup and system freeze (CVE-2021-20317)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2021-11-15T09:57:15Z","modified":"2026-02-04T13:45:10.032629Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:23.969672Z"},{"id":"UBUNTU-CVE-2021-43267","description":"An issue was discovered in net/tipc/crypto.c in the Linux kernel before 5.14.16. The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.","status":"published","published":"2021-11-02T23:15:00Z","modified":"2026-02-04T03:36:52.995265Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:54:29.220315Z"},{"id":"ALSA-2021:4647","title":"Important: kernel security update","description":"The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: Insufficient validation of user-supplied sizes for the MSG_CRYPTO message type (CVE-2021-43267)\n\n* kernel: timer tree corruption leads to missing wakeup and system freeze (CVE-2021-20317)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2021-11-15T09:57:15Z","modified":"2026-10-29T11:01:11.265203106Z","updated_at":"2026-11-02T15:27:51.196609Z"},{"id":"MGASA-2021-0507","title":"Updated kernel packages fix security vulnerabilities","description":"This kernel update is based on upstream 5.10.78 and fixes at least the\nfollowing security issues:\n\nA use-after-free vulnerability in the NFC stack can lead to a threat to\nconfidentiality, integrity, and system availability (CVE-2021-3760).\n\nA flaw in the SCTP stack where a blind attacker may be able to kill an\nexisting SCTP association through invalid chunks if the attacker knows\nthe IP-addresses and port numbers being used and the attacker can send\npackets with spoofed IP addresses (CVE-2021-3772).\n\nA flaw heap buffer overflow in the Linux kernel's AMD Radeon graphics\ncard driver was found in the way user writes some malicious data to the\nAMD GPU Display Driver Debug Filesystem (to the VGA sub-directory of the\n/sys/kernel/debug/ directory). A local user could use this flaw to crash\nthe system or escalate their privileges on the system (CVE-2021-42327).\n\nThe firewire subsystem in the Linux kernel through 5.14.13 has a buffer\noverflow related to drivers/media/firewire/firedtv-avc.c and\ndrivers/media/firewire/firedtv-ci.c, because avc_ca_pmt mishandles\nbounds checking (CVE-2021-42739).\n\nA flaw was discovered in the cryptographic receive code in the Linux\nkernel's implementation of transparent interprocess communication. An\nattacker, with the ability to send TIPC messages to the target, can\ncorrupt memory and escalate privileges on the target system\n(CVE-2021-43267).\n\nAn issue was discovered in the Linux kernel before 5.14.15. There is an\narray-index-out-of-bounds flaw in the detach_capi_ctr function in\ndrivers/isdn/capi/kcapi.c (CVE-2021-43389).\n\nwireguard-tools are updated to 1.0.20210914.\n\nFor other upstream fixes, see the referenced changelogs. \n","status":"published","published":"2021-11-11T15:02:40Z","modified":"2026-04-16T04:41:16.281636144Z","updated_at":"2026-11-02T15:49:41.849028Z"},{"id":"MGASA-2021-0508","title":"Updated kernel-linus packages fix security vulnerabilities","description":"This kernel-linus update is based on upstream 5.10.78 and fixes at least\nthe following security issues:\n\nA use-after-free vulnerability in the NFC stack can lead to a threat to\nconfidentiality, integrity, and system availability (CVE-2021-3760).\n\nA flaw in the SCTP stack where a blind attacker may be able to kill an\nexisting SCTP association through invalid chunks if the attacker knows\nthe IP-addresses and port numbers being used and the attacker can send\npackets with spoofed IP addresses (CVE-2021-3772).\n\nA flaw heap buffer overflow in the Linux kernel's AMD Radeon graphics\ncard driver was found in the way user writes some malicious data to the\nAMD GPU Display Driver Debug Filesystem (to the VGA sub-directory of the\n/sys/kernel/debug/ directory). A local user could use this flaw to crash\nthe system or escalate their privileges on the system (CVE-2021-42327).\n\nThe firewire subsystem in the Linux kernel through 5.14.13 has a buffer\noverflow related to drivers/media/firewire/firedtv-avc.c and\ndrivers/media/firewire/firedtv-ci.c, because avc_ca_pmt mishandles\nbounds checking (CVE-2021-42739).\n\nA flaw was discovered in the cryptographic receive code in the Linux\nkernel's implementation of transparent interprocess communication. An\nattacker, with the ability to send TIPC messages to the target, can\ncorrupt memory and escalate privileges on the target system\n(CVE-2021-43267).\n\nAn issue was discovered in the Linux kernel before 5.14.15. There is an\narray-index-out-of-bounds flaw in the detach_capi_ctr function in\ndrivers/isdn/capi/kcapi.c (CVE-2021-43389).\n\nFor other upstream fixes, see the referenced changelogs. \n","status":"published","published":"2021-11-11T15:02:40Z","modified":"2026-04-16T04:43:17.159497385Z","updated_at":"2026-11-02T15:49:41.849028Z"},{"id":"PUB-A-205243414","description":"In tipc_crypto_key_rcv of net/tipc/crypto.c , there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote code execution with System execution privileges needed. User interaction is not needed for exploitation.","status":"published","published":"2022-03-01T00:00:00Z","modified":"2026-11-10T17:02:23.040266809Z","updated_at":"2026-11-10T17:35:08.408541Z"},{"id":"USN-5165-1","title":"linux-oem-5.14 vulnerabilities","description":"It was discovered that the NFC subsystem in the Linux kernel contained a\nuse-after-free vulnerability in its NFC Controller Interface (NCI)\nimplementation. A local attacker could possibly use this to cause a denial\nof service (system crash) or execute arbitrary code. (CVE-2021-3760)\n\nIt was discovered that the SCTP protocol implementation in the Linux kernel\ndid not properly verify VTAGs in some situations. A remote attacker could\npossibly use this to cause a denial of service (connection disassociation).\n(CVE-2021-3772)\n\nIt was discovered that the AMD Radeon GPU driver in the Linux kernel did\nnot properly validate writes in the debugfs file system. A privileged\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2021-42327)\n\nLuo Likang discovered that the FireDTV Firewire driver in the Linux kernel\ndid not properly perform bounds checking in some situations. A local\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2021-42739)\n\nIt was discovered that the KVM implementation for POWER8 processors in the\nLinux kernel did not properly keep track if a wakeup event could be\nresolved by a guest. An attacker in a guest VM could possibly use this to\ncause a denial of service (host OS crash). (CVE-2021-43056)\n\nIt was discovered that the TIPC Protocol implementation in the Linux kernel\ndid not properly validate MSG_CRYPTO messages in some situations. An\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2021-43267)\n\nIt was discovered that the ISDN CAPI implementation in the Linux kernel\ncontained a race condition in certain situations that could trigger an\narray out-of-bounds bug. A privileged local attacker could possibly use\nthis to cause a denial of service or execute arbitrary code.\n(CVE-2021-43389)\n\n","status":"published","published":"2021-11-30T23:48:03Z","modified":"2026-09-09T14:33:17.488411878Z","updated_at":"2026-11-02T16:58:15.683829Z"},{"id":"USN-5207-1","title":"linux-oem-5.10 vulnerabilities","description":"Nadav Amit discovered that the hugetlb implementation in the Linux kernel\ndid not perform TLB flushes under certain conditions. A local attacker\ncould use this to leak or alter data from other processes that use huge\npages. (CVE-2021-4002)\n\nIt was discovered that the eBPF implementation in the Linux kernel\ncontained a race condition around read-only maps. A privileged attacker\ncould use this to modify read-only maps. (CVE-2021-4001)\n\nLuo Likang discovered that the FireDTV Firewire driver in the Linux kernel\ndid not properly perform bounds checking in some situations. A local\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2021-42739)\n\nIt was discovered that the TIPC Protocol implementation in the Linux kernel\ndid not properly validate MSG_CRYPTO messages in some situations. An\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2021-43267)\n","status":"published","published":"2022-01-05T17:03:26Z","modified":"2026-06-03T14:03:53.068067565Z","updated_at":"2026-11-02T16:58:15.683829Z"},{"id":"USN-5208-1","title":"linux, linux-aws, linux-aws-5.11, linux-azure, linux-azure-5.11, linux-gcp, linux-gcp-5.11, linux-hwe-5.11, linux-kvm, linux-oracle, linux-oracle-5.11, linux-raspi vulnerabilities","description":"Nadav Amit discovered that the hugetlb implementation in the Linux kernel\ndid not perform TLB flushes under certain conditions. A local attacker\ncould use this to leak or alter data from other processes that use huge\npages. (CVE-2021-4002)\n\nIt was discovered that a race condition existed in the overlay file system\nimplementation in the Linux kernel. A local attacker could use this to\ncause a denial of service (system crash). (CVE-2021-20321)\n\nIt was discovered that the NFC subsystem in the Linux kernel contained a\nuse-after-free vulnerability in its NFC Controller Interface (NCI)\nimplementation. A local attacker could possibly use this to cause a denial\nof service (system crash) or execute arbitrary code. (CVE-2021-3760)\n\nIt was discovered that an integer overflow could be triggered in the eBPF\nimplementation in the Linux kernel when preallocating objects for stack\nmaps. A privileged local attacker could use this to cause a denial of\nservice or possibly execute arbitrary code. (CVE-2021-41864)\n\nIt was discovered that the KVM implementation for POWER8 processors in the\nLinux kernel did not properly keep track if a wakeup event could be\nresolved by a guest. An attacker in a guest VM could possibly use this to\ncause a denial of service (host OS crash). (CVE-2021-43056)\n\nIt was discovered that the TIPC Protocol implementation in the Linux kernel\ndid not properly validate MSG_CRYPTO messages in some situations. An\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2021-43267)\n\nIt was discovered that the ISDN CAPI implementation in the Linux kernel\ncontained a race condition in certain situations that could trigger an\narray out-of-bounds bug. A privileged local attacker could possibly use\nthis to cause a denial of service or execute arbitrary code.\n(CVE-2021-43389)\n","status":"published","published":"2022-01-06T02:05:41Z","modified":"2026-09-09T14:33:22.821546572Z","updated_at":"2026-11-02T16:58:15.683829Z"},{"id":"USN-5218-1","title":"linux-oem-5.13 vulnerabilities","description":"Nadav Amit discovered that the hugetlb implementation in the Linux kernel\ndid not perform TLB flushes under certain conditions. A local attacker\ncould use this to leak or alter data from other processes that use huge\npages. (CVE-2021-4002)\n\nIt was discovered that the eBPF implementation in the Linux kernel did\nnot properly validate the memory size of certain ring buffer operation\narguments. A local attacker could use this to cause a denial of service\n(system crash) or possibly execute arbitrary code. (CVE-2021-4204)\n\nIt was discovered that a race condition existed in the overlay file system\nimplementation in the Linux kernel. A local attacker could use this to\ncause a denial of service (system crash). (CVE-2021-20321)\n\nIt was discovered that the NFC subsystem in the Linux kernel contained a\nuse-after-free vulnerability in its NFC Controller Interface (NCI)\nimplementation. A local attacker could possibly use this to cause a denial\nof service (system crash) or execute arbitrary code. (CVE-2021-3760)\n\nIt was discovered that an integer overflow could be triggered in the eBPF\nimplementation in the Linux kernel when preallocating objects for stack\nmaps. A privileged local attacker could use this to cause a denial of\nservice or possibly execute arbitrary code. (CVE-2021-41864)\n\nIt was discovered that the KVM implementation for POWER8 processors in the\nLinux kernel did not properly keep track if a wakeup event could be\nresolved by a guest. An attacker in a guest VM could possibly use this to\ncause a denial of service (host OS crash). (CVE-2021-43056)\n\nIt was discovered that the TIPC Protocol implementation in the Linux kernel\ndid not properly validate MSG_CRYPTO messages in some situations. An\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2021-43267)\n\nIt was discovered that the ISDN CAPI implementation in the Linux kernel\ncontained a race condition in certain situations that could trigger an\narray out-of-bounds bug. A privileged local attacker could possibly use\nthis to cause a denial of service or execute arbitrary code.\n(CVE-2021-43389)\n\n","status":"published","published":"2022-01-11T04:58:00Z","modified":"2026-09-09T14:31:47.938272603Z","updated_at":"2026-11-02T16:58:15.683829Z"}]}}