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LinuxCVE-2024-44992

HistorySep 04, 2024 - 8:15 p.m.

CVE-2024-44992

2024-09-0420:15:08

CWE-476

Linux

web.nvd.nist.gov

121

linux kernel

vulnerability

cve-2024-44992

null dereference

smb/client

clang static checker

warning

cifs_free_subrequest

commit

add tracepoint

credits

r/w requests

add credits

null pointer

problem

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

AI Score

6.9

Confidence

Low

EPSS

Percentile

9.6%

JSON

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

smb/client: avoid possible NULL dereference in cifs_free_subrequest()

Clang static checker (scan-build) warning:
cifsglob.h:line 890, column 3
Access to field ‘ops’ results in a dereference of a null pointer.

Commit 519be989717c (“cifs: Add a tracepoint to track credits involved in
R/W requests”) adds a check for ‘rdata->server’, and let clang throw this
warning about NULL dereference.

When ‘rdata->credits.value != 0 && rdata->server == NULL’ happens,
add_credits_and_wake_if() will call rdata->server->ops->add_credits().
This will cause NULL dereference problem. Add a check for ‘rdata->server’
to avoid NULL dereference.

Affected configurations

Nvd

Vulners

Node

linuxlinux_kernelRange6.10–6.10.7

linuxlinux_kernelMatch6.11rc1

linuxlinux_kernelMatch6.11rc2

linuxlinux_kernelMatch6.11rc3

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel6.11cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*
linuxlinux_kernel6.11cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*
linuxlinux_kernel6.11cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	6.11	cpe:2.3:o:linux:linux_kernel:6.11:rc1::::::
linux	linux_kernel	6.11	cpe:2.3:o:linux:linux_kernel:6.11:rc2::::::
linux	linux_kernel	6.11	cpe:2.3:o:linux:linux_kernel:6.11:rc3::::::

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/smb/client/file.c"
    ],
    "versions": [
      {
        "version": "69c3c023af25",
        "lessThan": "fead60a6d5f8",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "69c3c023af25",
        "lessThan": "74c2ab6d653b",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/smb/client/file.c"
    ],
    "versions": [
      {
        "version": "6.10",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.10",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10.7",
        "lessThanOrEqual": "6.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.11",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]