CVE-2021-47395

2024-05-2115:15:24

416baaa9-dc9f-4396-8d5f-8c081fb06d67

web.nvd.nist.gov

linux kernel

mac80211

vht mcs

ieee80211_parse_tx_radiotap

syzbot

security vulnerability

6.7 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

10.4%

JSON

In the Linux kernel, the following vulnerability has been resolved:

mac80211: limit injected vht mcs/nss in ieee80211_parse_tx_radiotap

Limit max values for vht mcs and nss in ieee80211_parse_tx_radiotap
routine in order to fix the following warning reported by syzbot:

WARNING: CPU: 0 PID: 10717 at include/net/mac80211.h:989 ieee80211_rate_set_vht include/net/mac80211.h:989 [inline]
WARNING: CPU: 0 PID: 10717 at include/net/mac80211.h:989 ieee80211_parse_tx_radiotap+0x101e/0x12d0 net/mac80211/tx.c:2244
Modules linked in:
CPU: 0 PID: 10717 Comm: syz-executor.5 Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ieee80211_rate_set_vht include/net/mac80211.h:989 [inline]
RIP: 0010:ieee80211_parse_tx_radiotap+0x101e/0x12d0 net/mac80211/tx.c:2244
RSP: 0018:ffffc9000186f3e8 EFLAGS: 00010216
RAX: 0000000000000618 RBX: ffff88804ef76500 RCX: ffffc900143a5000
RDX: 0000000000040000 RSI: ffffffff888f478e RDI: 0000000000000003
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000100
R10: ffffffff888f46f9 R11: 0000000000000000 R12: 00000000fffffff8
R13: ffff88804ef7653c R14: 0000000000000001 R15: 0000000000000004
FS: 00007fbf5718f700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2de23000 CR3: 000000006a671000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
ieee80211_monitor_select_queue+0xa6/0x250 net/mac80211/iface.c:740
netdev_core_pick_tx+0x169/0x2e0 net/core/dev.c:4089
__dev_queue_xmit+0x6f9/0x3710 net/core/dev.c:4165
__bpf_tx_skb net/core/filter.c:2114 [inline]
__bpf_redirect_no_mac net/core/filter.c:2139 [inline]
__bpf_redirect+0x5ba/0xd20 net/core/filter.c:2162
____bpf_clone_redirect net/core/filter.c:2429 [inline]
bpf_clone_redirect+0x2ae/0x420 net/core/filter.c:2401
bpf_prog_eeb6f53a69e5c6a2+0x59/0x234
bpf_dispatcher_nop_func include/linux/bpf.h:717 [inline]
__bpf_prog_run include/linux/filter.h:624 [inline]
bpf_prog_run include/linux/filter.h:631 [inline]
bpf_test_run+0x381/0xa30 net/bpf/test_run.c:119
bpf_prog_test_run_skb+0xb84/0x1ee0 net/bpf/test_run.c:663
bpf_prog_test_run kernel/bpf/syscall.c:3307 [inline]
__sys_bpf+0x2137/0x5df0 kernel/bpf/syscall.c:4605
__do_sys_bpf kernel/bpf/syscall.c:4691 [inline]
__se_sys_bpf kernel/bpf/syscall.c:4689 [inline]
__x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4689
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9

Affected configurations

Vulners

Node

linuxlinux_kernelRange4.7–4.9.285

linuxlinux_kernelRange4.10.0–4.14.249

linuxlinux_kernelRange4.15.0–4.19.209

linuxlinux_kernelRange4.20.0–5.4.151

linuxlinux_kernelRange5.5.0–5.10.71

linuxlinux_kernelRange5.11.0–5.14.10

linuxlinux_kernelRange5.15.0≥

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/mac80211/tx.c"
    ],
    "versions": [
      {
        "version": "646e76bb5daf",
        "lessThan": "e5bb852aa2ad",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "646e76bb5daf",
        "lessThan": "ce5f372f5f08",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "646e76bb5daf",
        "lessThan": "76538c7b4df3",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "646e76bb5daf",
        "lessThan": "ab85997465b9",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "646e76bb5daf",
        "lessThan": "1282bb00835f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "646e76bb5daf",
        "lessThan": "997ee230e4f5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "646e76bb5daf",
        "lessThan": "13cb6d826e0a",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/mac80211/tx.c"
    ],
    "versions": [
      {
        "version": "4.7",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.7",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.9.285",
        "lessThanOrEqual": "4.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.14.249",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.209",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.151",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.71",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.14.10",
        "lessThanOrEqual": "5.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]