{
  "cveId": "CVE-2022-48839",
  "url": "https://patchblox.com/security/cve/CVE-2022-48839",
  "summary": "CVE-2022-48839 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48839, released July 16, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  net/packet: fix slab-out-of-bounds access in pac...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net/packet: fix slab-out-of-bounds access in packet_recvmsg()  syzbot found that when an AF_PACKET socket is using PACKET_COPY_THRESH and mmap operations, tpacket_rcv() is queueing skbs with garbage in skb-\u003Ecb[], triggering a too big copy [1]  Presumably, users of af_packet using mmap() already gets correct metadata from the mapped buffer, we can simply make sure to clear 12 bytes that might be copied to user space later.  BUG: KASAN: stack-out-of-bounds in memcpy include/linux/fortify-string.h:225 [inline] BUG: KASAN: stack-out-of-bounds in packet_recvmsg\u002B0x56c/0x1150 net/packet/af_packet.c:3489 Write of size 165 at addr ffffc9000385fb78 by task syz-executor233/3631  CPU: 0 PID: 3631 Comm: syz-executor233 Not tainted 5.17.0-rc7-syzkaller-02396-g0b3660695e80 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace:  \u003CTASK\u003E  __dump_stack lib/dump_stack.c:88 [inline]  dump_stack_lvl\u002B0xcd/0x134 lib/dump_stack.c:106  print_address_description.constprop.0.cold\u002B0xf/0x336 mm/kasan/report.c:255  __kasan_report mm/kasan/report.c:442 [inline]  kasan_report.cold\u002B0x83/0xdf mm/kasan/report.c:459  check_region_inline mm/kasan/generic.c:183 [inline]  kasan_check_range\u002B0x13d/0x180 mm/kasan/generic.c:189  memcpy\u002B0x39/0x60 mm/kasan/shadow.c:66  memcpy include/linux/fortify-string.h:225 [inline]  packet_recvmsg\u002B0x56c/0x1150 net/packet/af_packet.c:3489  sock_recvmsg_nosec net/socket.c:948 [inline]  sock_recvmsg net/socket.c:966 [inline]  sock_recvmsg net/socket.c:962 [inline]  ____sys_recvmsg\u002B0x2c4/0x600 net/socket.c:2632  ___sys_recvmsg\u002B0x127/0x200 net/socket.c:2674  __sys_recvmsg\u002B0xe2/0x1a0 net/socket.c:2704  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 RIP: 0033:0x7fdfd5954c29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003C48\u003E 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcf8e71e48 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fdfd5954c29 RDX: 0000000000000000 RSI: 0000000020000500 RDI: 0000000000000005 RBP: 0000000000000000 R08: 000000000000000d R09: 000000000000000d R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcf8e71e60 R13: 00000000000f4240 R14: 000000000000c1ff R15: 00007ffcf8e71e54  \u003C/TASK\u003E  addr ffffc9000385fb78 is located in stack of task syz-executor233/3631 at offset 32 in frame:  ____sys_recvmsg\u002B0x0/0x600 include/linux/uio.h:246  this frame has 1 object:  [32, 160) \u0027addr\u0027  Memory state around the buggy address:  ffffc9000385fa80: 00 04 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00 00  ffffc9000385fb00: 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 \u003Effffc9000385fb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f3                                                                 ^  ffffc9000385fc00: f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 f1  ffffc9000385fc80: f1 f1 f1 00 f2 f2 f2 00 f2 f2 f2 00 00 00 00 00 ==================================================================",
  "published": "2024-07-16T13:15:11Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00269,
  "epssPercentile": 0.19195,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.17.3-1",
      "fix": "DEBIAN-CVE-2022-48839",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48839",
      "released": "2024-07-16T13:15:11Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.17.3-1",
      "fix": "DEBIAN-CVE-2022-48839",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48839",
      "released": "2024-07-16T13:15:11Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.17.3-1",
      "fix": "DEBIAN-CVE-2022-48839",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48839",
      "released": "2024-07-16T13:15:11Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}