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cve416baaa9-dc9f-4396-8d5f-8c081fb06d67CVE-2021-47558
HistoryMay 24, 2024 - 3:15 p.m.

CVE-2021-47558

2024-05-2415:15:20
416baaa9-dc9f-4396-8d5f-8c081fb06d67
web.nvd.nist.gov
24
linux kernel
net
stmmac
vulnerability
tx queues
reconfiguring interface
kernel panic
ethtool
xdp program
patch
paging request.

6.5 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

9.0%

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

net: stmmac: Disable Tx queues when reconfiguring the interface

The Tx queues were not disabled in situations where the driver needed to
stop the interface to apply a new configuration. This could result in a
kernel panic when doing any of the 3 following actions:

  • reconfiguring the number of queues (ethtool -L)
  • reconfiguring the size of the ring buffers (ethtool -G)
  • installing/removing an XDP program (ip l set dev ethX xdp)

Prevent the panic by making sure netif_tx_disable is called when stopping
an interface.

Without this patch, the following kernel panic can be observed when doing
any of the actions above:

Unable to handle kernel paging request at virtual address ffff80001238d040
[…]
Call trace:
dwmac4_set_addr+0x8/0x10
dev_hard_start_xmit+0xe4/0x1ac
sch_direct_xmit+0xe8/0x39c
__dev_queue_xmit+0x3ec/0xaf0
dev_queue_xmit+0x14/0x20
[…]
[ end trace 0000000000000002 ]—

Affected configurations

Vulners
Node
linuxlinux_kernelRange5.105.15.6
OR
linuxlinux_kernelRange5.16.0

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/ethernet/stmicro/stmmac/stmmac_main.c"
    ],
    "versions": [
      {
        "version": "0366f7e06a6b",
        "lessThan": "a92f0eebb8dc",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0366f7e06a6b",
        "lessThan": "b270bfe69736",
        "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/ethernet/stmicro/stmmac/stmmac_main.c"
    ],
    "versions": [
      {
        "version": "5.10",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.10",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.6",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.16",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

6.5 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

9.0%