CVE-2024-38616

2024-06-1914:15:21

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

web.nvd.nist.gov

linux kernel

wifi carl9170

fortified-memset

vulnerability

write overflow

6.5 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.7%

JSON

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

wifi: carl9170: re-fix fortified-memset warning

The carl9170_tx_release() function sometimes triggers a fortified-memset
warning in my randconfig builds:

In file included from include/linux/string.h:254,
from drivers/net/wireless/ath/carl9170/tx.c:40:
In function ‘fortify_memset_chk’,
inlined from ‘carl9170_tx_release’ at drivers/net/wireless/ath/carl9170/tx.c:283:2,
inlined from ‘kref_put’ at include/linux/kref.h:65:3,
inlined from ‘carl9170_tx_put_skb’ at drivers/net/wireless/ath/carl9170/tx.c:342:9:
include/linux/fortify-string.h:493:25: error: call to ‘__write_overflow_field’ declared with attribute warning: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Werror=attribute-warning]
493 | __write_overflow_field(p_size_field, size);

Kees previously tried to avoid this by using memset_after(), but it seems
this does not fully address the problem. I noticed that the memset_after()
here is done on a different part of the union (status) than the original
cast was from (rate_driver_data), which may confuse the compiler.

Unfortunately, the memset_after() trick does not work on driver_rates[]
because that is part of an anonymous struct, and I could not get
struct_group() to do this either. Using two separate memset() calls
on the two members does address the warning though.

Affected configurations

Vulners

Node

linuxlinux_kernelRange5.17–6.1.93

linuxlinux_kernelRange6.2.0–6.6.33

linuxlinux_kernelRange6.7.0–6.8.12

linuxlinux_kernelRange6.9.0–6.9.3

linuxlinux_kernelRange6.10.0–6.10-rc1

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/wireless/ath/carl9170/tx.c"
    ],
    "versions": [
      {
        "version": "fb5f6a0e8063",
        "lessThan": "13857683126e",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "fb5f6a0e8063",
        "lessThan": "875864670982",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "fb5f6a0e8063",
        "lessThan": "0c38c9c460bb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "fb5f6a0e8063",
        "lessThan": "042a39bb8e08",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "fb5f6a0e8063",
        "lessThan": "066afafc10c9",
        "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/wireless/ath/carl9170/tx.c"
    ],
    "versions": [
      {
        "version": "5.17",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.17",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.93",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.33",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.12",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.3",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]