{
  "cveId": "CVE-2022-48726",
  "url": "https://patchblox.com/security/cve/CVE-2022-48726",
  "summary": "CVE-2022-48726 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48726, released June 20, 2024. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  RDMA/ucma: Protect mc during concurrent multicas...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  RDMA/ucma: Protect mc during concurrent multicast leaves  Partially revert the commit mentioned in the Fixes line to make sure that allocation and erasing multicast struct are locked.    BUG: KASAN: use-after-free in ucma_cleanup_multicast drivers/infiniband/core/ucma.c:491 [inline]   BUG: KASAN: use-after-free in ucma_destroy_private_ctx\u002B0x914/0xb70 drivers/infiniband/core/ucma.c:579   Read of size 8 at addr ffff88801bb74b00 by task syz-executor.1/25529   CPU: 0 PID: 25529 Comm: syz-executor.1 Not tainted 5.16.0-rc7-syzkaller #0   Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011   Call Trace:    __dump_stack lib/dump_stack.c:88 [inline]    dump_stack_lvl\u002B0xcd/0x134 lib/dump_stack.c:106    print_address_description.constprop.0.cold\u002B0x8d/0x320 mm/kasan/report.c:247    __kasan_report mm/kasan/report.c:433 [inline]    kasan_report.cold\u002B0x83/0xdf mm/kasan/report.c:450    ucma_cleanup_multicast drivers/infiniband/core/ucma.c:491 [inline]    ucma_destroy_private_ctx\u002B0x914/0xb70 drivers/infiniband/core/ucma.c:579    ucma_destroy_id\u002B0x1e6/0x280 drivers/infiniband/core/ucma.c:614    ucma_write\u002B0x25c/0x350 drivers/infiniband/core/ucma.c:1732    vfs_write\u002B0x28e/0xae0 fs/read_write.c:588    ksys_write\u002B0x1ee/0x250 fs/read_write.c:643    do_syscall_x64 arch/x86/entry/common.c:50 [inline]    do_syscall_64\u002B0x35/0xb0 arch/x86/entry/common.c:80    entry_SYSCALL_64_after_hwframe\u002B0x44/0xae  Currently the xarray search can touch a concurrently freeing mc as the xa_for_each() is not surrounded by any lock. Rather than hold the lock for a full scan hold it only for the effected items, which is usually an empty list.",
  "published": "2024-06-20T12:15:11Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00238,
  "epssPercentile": 0.14911,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.16.10-1",
      "fix": "DEBIAN-CVE-2022-48726",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48726",
      "released": "2024-06-20T12:15:11Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.16.10-1",
      "fix": "DEBIAN-CVE-2022-48726",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48726",
      "released": "2024-06-20T12:15:11Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.16.10-1",
      "fix": "DEBIAN-CVE-2022-48726",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48726",
      "released": "2024-06-20T12:15:11Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}