{
  "schema_version": "1.7.0",
  "id": "LSN-0082-1",
  "summary": "Kernel Live Patch Security Notice",
  "details": "Jann Horn discovered that the tty subsystem of the Linux kernel did not use\nconsistent locking in some situations, leading to a read-after-free\nvulnerability. A local attacker could use this to cause a denial of service\n(system crash) or possibly expose sensitive information (kernel memory).(CVE-2020-29660)\n\nJann Horn discovered a race condition in the tty subsystem of the Linux\nkernel in the locking for the TIOCSPGRP ioctl(), leading to a use-after-\nfree vulnerability. A local attacker could use this to cause a denial of\nservice (system crash) or possibly execute arbitrary code.(CVE-2020-29661)\n\nDe4dCr0w of 360 Alpha Lab discovered that the BPF verifier in the Linux\nkernel did not properly handle mod32 destination register truncation when\nthe source register was known to be 0. A local attacker could use this to\nexpose sensitive information (kernel memory) or possibly execute arbitrary\ncode.(CVE-2021-3444)\n\nkernel: use-after-free in route4_change() in\nnet/sched/cls_route.c(CVE-2021-3715)",
  "aliases": [],
  "upstream": [
    "UBUNTU-CVE-2020-29660",
    "UBUNTU-CVE-2020-29661",
    "UBUNTU-CVE-2021-3444",
    "UBUNTU-CVE-2021-3715"
  ],
  "related": [],
  "published": "2021-11-11T06:14:44Z",
  "modified": "2026-06-03T10:46:31Z",
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}