{"id":"CVE-2021-29646","aliases":["A-184622243","ALSA-2021:4356","AZL-6549","BELL-CVE-2021-29646","DEBIAN-CVE-2021-29646","EUVD-2021-16122","GHSA-5jv2-3rr2-pc65","PUB-A-184622243","RHSA-2021:4140","RHSA-2021:4356","UBUNTU-CVE-2021-29646","USN-4947-1","USN-4948-1","USN-4949-1"],"status":"published","title":"An issue was discovered in the Linux kernel before 5.11.11. tipc_nl_retrieve_key in net/tipc/node...","description":"An issue was discovered in the Linux kernel before 5.11.11. tipc_nl_retrieve_key in net/tipc/node.c does not properly validate certain data sizes, aka 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issue was discovered in the Linux kernel before 5.11.11. tipc_nl_retrieve_key in net/tipc/node.c does not properly validate certain data sizes, aka CID-0217ed2848e8.","status":"published","published":"2021-03-30T20:36:55Z","modified":"2024-08-03T22:11:06.245Z","updated_at":"2026-11-02T14:33:06.32268Z"}],"euvd":[{"id":"EUVD-2021-16122","description":"An issue was discovered in the Linux kernel before 5.11.11. tipc_nl_retrieve_key in net/tipc/node.c does not properly validate certain data sizes, aka CID-0217ed2848e8.","status":"published","published":"2021-03-30T20:36:55Z","modified":"2024-08-03T22:11:06Z","updated_at":"2026-11-03T03:24:43.965438Z"}],"ghsa":[{"id":"GHSA-5jv2-3rr2-pc65","title":"An issue was discovered in the Linux kernel before 5.11.11. tipc_nl_retrieve_key in net/tipc/node...","description":"An issue was discovered in the Linux kernel before 5.11.11. tipc_nl_retrieve_key in net/tipc/node.c does not properly validate certain data sizes, aka CID-0217ed2848e8.","status":"published","published":"2022-05-24T17:45:53Z","modified":"2023-01-29T05:05:48Z","updated_at":"2026-11-02T14:45:52.819939Z"}],"nvd":[{"id":"CVE-2021-29646","description":"An issue was discovered in the Linux kernel before 5.11.11. tipc_nl_retrieve_key in net/tipc/node.c does not properly validate certain data sizes, aka CID-0217ed2848e8.","status":"published","published":"2021-03-30T21:15:14.093Z","modified":"2026-06-17T03:48:04.793Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:06:51.197859Z"}],"osv":[{"id":"AZL-6549","title":"CVE-2021-29646 affecting package kernel for versions less than 5.10.78.1-1","description":"An issue was discovered in the Linux kernel before 5.11.11. tipc_nl_retrieve_key in net/tipc/node.c does not properly validate certain data sizes, aka CID-0217ed2848e8.","status":"published","published":"2021-03-30T21:15:14Z","modified":"2026-04-21T04:37:37.101313Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:28:08.076947Z"},{"id":"BELL-CVE-2021-29646","title":"CVE-2021-29646 does not affect BellSoft software","status":"withdrawn","published":"2021-03-30T21:15:00Z","modified":"2026-01-26T09:48:07.801849Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:28:15.925958Z"},{"id":"CVE-2021-29646","description":"An issue was discovered in the Linux kernel before 5.11.11. tipc_nl_retrieve_key in net/tipc/node.c does not properly validate certain data sizes, aka CID-0217ed2848e8.","status":"published","published":"2021-03-30T21:15:14.093Z","modified":"2026-03-14T10:54:45.860659Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:19.483607Z"},{"id":"DEBIAN-CVE-2021-29646","description":"An issue was discovered in the Linux kernel before 5.11.11. tipc_nl_retrieve_key in net/tipc/node.c does not properly validate certain data sizes, aka CID-0217ed2848e8.","status":"published","published":"2021-03-30T21:15:14.093Z","modified":"2026-10-23T18:04:49.815544759Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:34.94143Z"},{"id":"RHSA-2021:4140","title":"Red Hat Security Advisory: kernel-rt security and bug fix update","status":"published","published":"2024-09-13T23:13:13Z","modified":"2026-08-14T10:01:48Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.619234Z"},{"id":"RHSA-2021:4356","title":"Red Hat Security Advisory: kernel security, bug fix, and enhancement update","status":"published","published":"2024-09-16T05:32:57Z","modified":"2026-10-02T10:01:28Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.619234Z"},{"id":"UBUNTU-CVE-2021-29646","description":"An issue was discovered in the Linux kernel before 5.11.11. tipc_nl_retrieve_key in net/tipc/node.c does not properly validate certain data sizes, aka CID-0217ed2848e8.","status":"published","published":"2021-03-30T21:15:00Z","modified":"2026-02-04T04:24:53.900218Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:26.779273Z"},{"id":"ALSA-2021:4356","title":"Moderate: kernel security, bug fix, and enhancement update","description":"The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n* kernel: out-of-bounds reads in pinctrl subsystem (CVE-2020-0427)\n* kernel: Improper input validation in some Intel(R) Ethernet E810 Adapter drivers (CVE-2020-24502)\n* kernel: Insufficient access control in some Intel(R) Ethernet E810 Adapter drivers (CVE-2020-24503)\n* kernel: Uncontrolled resource consumption in some Intel(R) Ethernet E810 Adapter drivers (CVE-2020-24504)\n* kernel: Fragmentation cache not cleared on reconnection (CVE-2020-24586)\n* kernel: Reassembling fragments encrypted under different keys (CVE-2020-24587)\n* kernel: wifi frame payload being parsed incorrectly as an L2 frame (CVE-2020-24588)\n* kernel: Forwarding EAPOL from unauthenticated wifi client (CVE-2020-26139)\n* kernel: accepting plaintext data frames in protected networks (CVE-2020-26140)\n* kernel: not verifying TKIP MIC of fragmented frames (CVE-2020-26141)\n* kernel: accepting fragmented plaintext frames in protected networks (CVE-2020-26143)\n* kernel: accepting unencrypted A-MSDU frames that start with RFC1042 header (CVE-2020-26144)\n* kernel: accepting plaintext broadcast fragments as full frames (CVE-2020-26145)\n* kernel: powerpc: RTAS calls can be used to compromise kernel integrity (CVE-2020-27777)\n* kernel: locking inconsistency in tty_io.c and tty_jobctrl.c can lead to a read-after-free (CVE-2020-29660)\n* kernel: buffer overflow in mwifiex_cmd_802_11_ad_hoc_start function via a long SSID value (CVE-2020-36158)\n* kernel: slab out-of-bounds read in hci_extended_inquiry_result_evt()  (CVE-2020-36386)\n* kernel: Improper access control in BlueZ may allow information disclosure vulnerability. (CVE-2021-0129)\n* kernel: Use-after-free in ndb_queue_rq() in drivers/block/nbd.c (CVE-2021-3348)\n* kernel: Linux kernel eBPF RINGBUF map oversized allocation (CVE-2021-3489)\n* kernel: double free in bluetooth subsystem when the HCI device initialization fails (CVE-2021-3564)\n* kernel: use-after-free in function hci_sock_bound_ioctl() (CVE-2021-3573)\n* kernel: eBPF 32-bit source register truncation on div/mod (CVE-2021-3600)\n* kernel: DoS in rb_per_cpu_empty() (CVE-2021-3679)\n* kernel: Mounting overlayfs inside an unprivileged user namespace can reveal files (CVE-2021-3732)\n* kernel: heap overflow in __cgroup_bpf_run_filter_getsockopt() (CVE-2021-20194)\n* kernel: Race condition in sctp_destroy_sock list_del (CVE-2021-23133)\n* kernel: fuse: stall on CPU can occur because a retry loop continually finds the same bad inode (CVE-2021-28950)\n* kernel: System crash in intel_pmu_drain_pebs_nhm in arch/x86/events/intel/ds.c (CVE-2021-28971)\n* kernel: protection can be bypassed to leak content of kernel memory (CVE-2021-29155)\n* kernel: improper input validation in tipc_nl_retrieve_key function in net/tipc/node.c (CVE-2021-29646)\n* kernel: lack a full memory barrier may lead to DoS (CVE-2021-29650)\n* kernel: local escalation of privileges in handling of eBPF programs (CVE-2021-31440)\n* kernel: protection of stack pointer against speculative pointer arithmetic can be bypassed to leak content of kernel memory (CVE-2021-31829)\n* kernel: out-of-bounds reads and writes due to enforcing incorrect limits for pointer arithmetic operations by BPF verifier (CVE-2021-33200)\n* kernel: reassembling encrypted fragments with non-consecutive packet numbers (CVE-2020-26146)\n* kernel: reassembling mixed encrypted/plaintext fragments (CVE-2020-26147)\n* kernel: the copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check (CVE-2020-29368)\n* kernel: flowtable list del corruption with kernel BUG at lib/list_debug.c:50 (CVE-2021-3635)\n* kernel: NULL pointer dereference in llsec_key_alloc() in net/mac802154/llsec.c (CVE-2021-3659)\n* kernel: setsockopt System Call Untrusted Pointer Dereference Information Disclosure (CVE-2021-20239)\n* kernel: out of bounds array access in drivers/md/dm-ioctl.c (CVE-2021-31916)","status":"published","published":"2021-11-09T09:08:02Z","modified":"2026-10-29T11:12:08.703144131Z","updated_at":"2026-11-02T15:27:51.196609Z"},{"id":"PUB-A-184622243","description":"In tipc_nl_retrieve_key of node.c, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.","status":"published","published":"2021-10-01T00:00:00Z","modified":"2026-11-10T17:02:23.040266809Z","updated_at":"2026-11-10T17:35:07.907985Z"},{"id":"USN-4947-1","title":"linux-oem-5.6 vulnerabilities","description":"Kiyin (尹亮) discovered that the x25 implementation in the Linux kernel\ncontained overflows when handling addresses from user space. A local\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2020-35519)\n\nIt was discovered that the fastrpc driver in the Linux kernel did not\nprevent user space applications from sending kernel RPC messages. A local\nattacker could possibly use this to gain elevated privileges.\n(CVE-2021-28375)\n\nIt was discovered that the TIPC protocol implementation in the Linux kernel\ndid not properly validate passed encryption key sizes. A local attacker\ncould use this to cause a denial of service (system crash).\n(CVE-2021-29646)\n\nIt was discovered that a race condition existed in the netfilter subsystem\nof the Linux kernel when replacing tables. A local attacker could use this\nto cause a denial of service (system crash). (CVE-2021-29650)\n\nArnd Bergmann discovered that the video4linux subsystem in the Linux kernel\ndid not properly deallocate memory in some situations. A local attacker\ncould use this to cause a denial of service (memory exhaustion).\n(CVE-2021-30002)\n","status":"published","published":"2021-05-11T21:41:11Z","modified":"2026-06-03T14:03:53.340299319Z","updated_at":"2026-11-02T16:58:15.159055Z"},{"id":"USN-4948-1","title":"linux-oem-5.10 vulnerabilities","description":"Ryota Shiga discovered that the eBPF implementation in the Linux kernel did\nnot properly verify that a BPF program only reserved as much memory for a\nring buffer as was allocated. A local attacker could use this to cause a\ndenial of service (system crash) or execute arbitrary code. (CVE-2021-3489)\n\nManfred Paul discovered that the eBPF implementation in the Linux kernel\ndid not properly track bounds on bitwise operations. A local attacker could\nuse this to cause a denial of service (system crash) or execute arbitrary\ncode. (CVE-2021-3490)\n\nBilly Jheng Bing-Jhong discovered that the io_uring implementation of the\nLinux kernel did not properly enforce the MAX_RW_COUNT limit in some\nsituations. A local attacker could use this to cause a denial of service\n(system crash) or execute arbitrary code. (CVE-2021-3491)\n\nKiyin (尹亮) discovered that the NFC LLCP protocol implementation in the\nLinux kernel contained a reference counting error. A local attacker could\nuse this to cause a denial of service (system crash). (CVE-2020-25670)\n\nKiyin (尹亮) discovered that the NFC LLCP protocol implementation in the\nLinux kernel did not properly deallocate memory in certain error\nsituations. A local attacker could use this to cause a denial of service\n(memory exhaustion). (CVE-2020-25671, CVE-2020-25672)\n\nIt was discovered that the Xen paravirtualization backend in the Linux\nkernel did not properly deallocate memory in some situations. A local\nattacker could use this to cause a denial of service (memory exhaustion).\n(CVE-2021-28688)\n\nIt was discovered that the io_uring subsystem in the Linux kernel contained\na race condition leading to a deadlock condition. A local attacker could\nuse this to cause a denial of service. (CVE-2021-28951)\n\nJohn Stultz discovered that the audio driver for Qualcomm SDM845 systems in\nthe Linux kernel did not properly validate port ID numbers. A local\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2021-28952)\n\nZygo Blaxell discovered that the btrfs file system implementation in the\nLinux kernel contained a race condition during certain cloning operations.\nA local attacker could possibly use this to cause a denial of service\n(system crash). (CVE-2021-28964)\n\nVince Weaver discovered that the perf subsystem in the Linux kernel did\nnot properly handle certain PEBS records properly for some Intel Haswell\nprocessors. A local attacker could use this to cause a denial of service\n(system crash). (CVE-2021-28971)\n\nIt was discovered that the RPA PCI Hotplug driver implementation in the\nLinux kernel did not properly handle device name writes via sysfs, leading\nto a buffer overflow. A privileged attacker could use this to cause a\ndenial of service (system crash) or possibly execute arbitrary code.\n(CVE-2021-28972)\n\nIt was discovered that the Freescale Gianfar Ethernet driver for the Linux\nkernel did not properly handle receive queue overrun when jumbo frames were\nenabled in some situations. An attacker could use this to cause a denial of\nservice (system crash). (CVE-2021-29264)\n\nIt was discovered that the vDPA backend virtio driver in the Linux kernel\ncontained a use-after-free vulnerability. An attacker could use this to\ncause a denial of service (system crash) or possibly execute arbitrary\ncode. (CVE-2021-29266)\n\nIt was discovered that the TIPC protocol implementation in the Linux kernel\ndid not properly validate passed encryption key sizes. A local attacker\ncould use this to cause a denial of service (system crash).\n(CVE-2021-29646)\n\nIt was discovered that the Qualcomm IPC router implementation in the Linux\nkernel did not properly initialize memory passed to user space. A local\nattacker could use this to expose sensitive information (kernel memory).\n(CVE-2021-29647)\n\nIt was discovered that the BPF user mode driver implementation in the Linux\nkernel did not properly deallocate memory in some situations. A local\nattacker could use this to cause a denial of service (memory exhaustion).\n(CVE-2021-29649)\n\nIt was discovered that a race condition existed in the netfilter subsystem\nof the Linux kernel when replacing tables. A local attacker could use this\nto cause a denial of service (system crash). (CVE-2021-29650)\n\nFelix Wilhelm discovered that the KVM implementation in the Linux kernel\nfor AMD processors contained race conditions on nested VMCB controls. A\nlocal attacker in a guest vm could possibly use this to gain elevated\nprivileges. (CVE-2021-29657)\n\nDan Carpenter discovered that the block device manager (dm) implementation\nin the Linux kernel contained a buffer overflow in the ioctl for listing\ndevices. A privileged local attacker could use this to cause a denial of\nservice (system crash). (CVE-2021-31916)\n\n马哲宇 discovered that the IEEE 1394 (Firewire) nosy packet sniffer\ndriver in the Linux kernel did not properly perform reference counting in\nsome situations, leading to a use-after-free vulnerability. A local\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2021-3483)\n","status":"published","published":"2021-05-11T22:31:50Z","modified":"2026-06-03T14:03:42.334918913Z","updated_at":"2026-11-02T16:58:15.159055Z"},{"id":"USN-4949-1","title":"linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oracle, linux-raspi vulnerabilities","description":"Ryota Shiga discovered that the eBPF implementation in the Linux kernel did\nnot properly verify that a BPF program only reserved as much memory for a\nring buffer as was allocated. A local attacker could use this to cause a\ndenial of service (system crash) or execute arbitrary code. (CVE-2021-3489)\n\nManfred Paul discovered that the eBPF implementation in the Linux kernel\ndid not properly track bounds on bitwise operations. A local attacker could\nuse this to cause a denial of service (system crash) or execute arbitrary\ncode. (CVE-2021-3490)\n\nBilly Jheng Bing-Jhong discovered that the io_uring implementation of the\nLinux kernel did not properly enforce the MAX_RW_COUNT limit in some\nsituations. A local attacker could use this to cause a denial of service\n(system crash) or execute arbitrary code. (CVE-2021-3491)\n\nIt was discovered that the Nouveau GPU driver in the Linux kernel did not\nproperly handle error conditions in some situations. A local attacker could\nuse this to cause a denial of service (system crash). (CVE-2020-25639)\n\nOlivier Benjamin, Norbert Manthey, Martin Mazein, and Jan H. Schönherr\ndiscovered that the Xen paravirtualization backend in the Linux kernel did\nnot properly propagate errors to frontend drivers in some situations. An\nattacker in a guest VM could possibly use this to cause a denial of service\n(host domain crash). (CVE-2021-26930)\n\nJan Beulich discovered that multiple Xen backends in the Linux kernel did\nnot properly handle certain error conditions under paravirtualization. An\nattacker in a guest VM could possibly use this to cause a denial of service\n(host domain crash). (CVE-2021-26931)\n\nIt was discovered that the fastrpc driver in the Linux kernel did not\nprevent user space applications from sending kernel RPC messages. A local\nattacker could possibly use this to gain elevated privileges.\n(CVE-2021-28375)\n\nIt was discovered that the Freescale Gianfar Ethernet driver for the Linux\nkernel did not properly handle receive queue overrun when jumbo frames were\nenabled in some situations. An attacker could use this to cause a denial of\nservice (system crash). (CVE-2021-29264)\n\nIt was discovered that the USB/IP driver in the Linux kernel contained race\nconditions during the update of local and shared status. An attacker could\nuse this to cause a denial of service (system crash). (CVE-2021-29265)\n\nIt was discovered that the vDPA backend virtio driver in the Linux kernel\ncontained a use-after-free vulnerability. An attacker could use this to\ncause a denial of service (system crash) or possibly execute arbitrary\ncode. (CVE-2021-29266)\n\nIt was discovered that the TIPC protocol implementation in the Linux kernel\ndid not properly validate passed encryption key sizes. A local attacker\ncould use this to cause a denial of service (system crash).\n(CVE-2021-29646)\n\nIt was discovered that a race condition existed in the netfilter subsystem\nof the Linux kernel when replacing tables. A local attacker could use this\nto cause a denial of service (system crash). (CVE-2021-29650)\n","status":"published","published":"2021-05-11T22:37:17Z","modified":"2026-06-03T14:04:16.16153225Z","updated_at":"2026-11-02T16:58:15.159055Z"}]}}