CVE-2023-52574

2024-03-0222:15:49

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

web.nvd.nist.gov

cve

2023

52574

linux kernel

vulnerability

null-ptr-deref

team device

security fix

6 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.2%

JSON

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

team: fix null-ptr-deref when team device type is changed

Get a null-ptr-deref bug as follows with reproducer [1].

BUG: kernel NULL pointer dereference, address: 0000000000000228
…
RIP: 0010:vlan_dev_hard_header+0x35/0x140 [8021q]
…
Call Trace:
<TASK>
? __die+0x24/0x70
? page_fault_oops+0x82/0x150
? exc_page_fault+0x69/0x150
? asm_exc_page_fault+0x26/0x30
? vlan_dev_hard_header+0x35/0x140 [8021q]
? vlan_dev_hard_header+0x8e/0x140 [8021q]
neigh_connected_output+0xb2/0x100
ip6_finish_output2+0x1cb/0x520
? nf_hook_slow+0x43/0xc0
? ip6_mtu+0x46/0x80
ip6_finish_output+0x2a/0xb0
mld_sendpack+0x18f/0x250
mld_ifc_work+0x39/0x160
process_one_work+0x1e6/0x3f0
worker_thread+0x4d/0x2f0
? __pfx_worker_thread+0x10/0x10
kthread+0xe5/0x120
? __pfx_kthread+0x10/0x10
ret_from_fork+0x34/0x50
? __pfx_kthread+0x10/0x10
ret_from_fork_asm+0x1b/0x30

[1]
$ teamd -t team0 -d -c ‘{“runner”: {“name”: “loadbalance”}}’
$ ip link add name t-dummy type dummy
$ ip link add link t-dummy name t-dummy.100 type vlan id 100
$ ip link add name t-nlmon type nlmon
$ ip link set t-nlmon master team0
$ ip link set t-nlmon nomaster
$ ip link set t-dummy up
$ ip link set team0 up
$ ip link set t-dummy.100 down
$ ip link set t-dummy.100 master team0

When enslave a vlan device to team device and team device type is changed
from non-ether to ether, header_ops of team device is changed to
vlan_header_ops. That is incorrect and will trigger null-ptr-deref
for vlan->real_dev in vlan_dev_hard_header() because team device is not
a vlan device.

Cache eth_header_ops in team_setup(), then assign cached header_ops to
header_ops of team net device when its type is changed from non-ether
to ether to fix the bug.

Affected configurations

Vulners

Node

linuxlinux_kernelRange3.7–4.14.327

linuxlinux_kernelRange4.15.0–4.19.296

linuxlinux_kernelRange4.20.0–5.4.258

linuxlinux_kernelRange5.5.0–5.10.198

linuxlinux_kernelRange5.11.0–5.15.134

linuxlinux_kernelRange5.16.0–6.1.56

linuxlinux_kernelRange6.2.0–6.5.6

linuxlinux_kernelRange6.6.0≥

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/team/team.c",
      "include/linux/if_team.h"
    ],
    "versions": [
      {
        "version": "1d76efe1577b",
        "lessThan": "1779eb51b9cc",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1d76efe1577b",
        "lessThan": "a7fb47b97111",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1d76efe1577b",
        "lessThan": "c5f6478686bb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1d76efe1577b",
        "lessThan": "b44dd92e2afd",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1d76efe1577b",
        "lessThan": "cd05eec2ee0c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1d76efe1577b",
        "lessThan": "2f0acb0736ec",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1d76efe1577b",
        "lessThan": "cac50d9f5d87",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1d76efe1577b",
        "lessThan": "492032760127",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/team/team.c",
      "include/linux/if_team.h"
    ],
    "versions": [
      {
        "version": "3.7",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.7",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.14.327",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.296",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.258",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.198",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.134",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.56",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.5.6",
        "lessThanOrEqual": "6.5.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]