CVE-2023-52567 serial: 8250_port: Check IRQ data before use

2024-03-0221:59:38

Linux

www.cve.org

linux kernel

vulnerability

irq polling

8250 hardware

null pointer

serial8250

system wakeup

oops error

7.4 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

13.2%

JSON

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

serial: 8250_port: Check IRQ data before use

In case the leaf driver wants to use IRQ polling (irq = 0) and
IIR register shows that an interrupt happened in the 8250 hardware
the IRQ data can be NULL. In such a case we need to skip the wake
event as we came to this path from the timer interrupt and quite
likely system is already awake.

Without this fix we have got an Oops:

serial8250: ttyS0 at I/O 0x3f8 (irq = 0, base_baud = 115200) is a 16550A
...
BUG: kernel NULL pointer dereference, address: 0000000000000010
RIP: 0010:serial8250_handle_irq+0x7c/0x240
Call Trace:
 ? serial8250_handle_irq+0x7c/0x240
 ? __pfx_serial8250_timeout+0x10/0x10

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/tty/serial/8250/8250_port.c"
    ],
    "versions": [
      {
        "version": "edfe57aedff4",
        "lessThan": "ee5732caaffb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0bd49a043c79",
        "lessThan": "c334650150c2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "572d48361aa0",
        "lessThan": "bf3c728e3692",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d5d628fea5f6",
        "lessThan": "e14afa4450cb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "424cf2929635",
        "lessThan": "2b837f13a818",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "727e92fe13e8",
        "lessThan": "e14f68a48fd4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0ba9e3a13c6a",
        "lessThan": "3345cc5f02f1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0ba9e3a13c6a",
        "lessThan": "cce7fc8b2996",
        "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/tty/serial/8250/8250_port.c"
    ],
    "versions": [
      {
        "version": "6.4",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.4",
        "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"
      }
    ]
  }
]