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LinuxCVE-2024-44932

HistoryAug 26, 2024 - 11:15 a.m.

CVE-2024-44932

2024-08-2611:15:05

CWE-416

Linux

web.nvd.nist.gov

linux kernel

vulnerability

uafs

page pools

interrupt vectors

napis

queues

memory

libeth

allocation

freeing logic

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

6.9

Confidence

Low

EPSS

Percentile

9.5%

JSON

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

idpf: fix UAFs when destroying the queues

The second tagged commit started sometimes (very rarely, but possible)
throwing WARNs from
net/core/page_pool.c:page_pool_disable_direct_recycling().
Turned out idpf frees interrupt vectors with embedded NAPIs before
freeing the queues making page_pools’ NAPI pointers lead to freed
memory before these pools are destroyed by libeth.
It’s not clear whether there are other accesses to the freed vectors
when destroying the queues, but anyway, we usually free queue/interrupt
vectors only when the queues are destroyed and the NAPIs are guaranteed
to not be referenced anywhere.

Invert the allocation and freeing logic making queue/interrupt vectors
be allocated first and freed last. Vectors don’t require queues to be
present, so this is safe. Additionally, this change allows to remove
that useless queue->q_vector pointer cleanup, as vectors are still
valid when freeing the queues (+ both are freed within one function,
so it’s not clear why nullify the pointers at all).

Affected configurations

Nvd

Vulners

Node

linuxlinux_kernelRange6.7–6.10.5

linuxlinux_kernelMatch6.11rc1

linuxlinux_kernelMatch6.11rc2

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:*:*:*:*:*:*

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::::::

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/intel/idpf/idpf_lib.c",
      "drivers/net/ethernet/intel/idpf/idpf_txrx.c"
    ],
    "versions": [
      {
        "version": "1c325aac10a8",
        "lessThan": "3cde714b0e77",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1c325aac10a8",
        "lessThan": "290f1c033281",
        "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/intel/idpf/idpf_lib.c",
      "drivers/net/ethernet/intel/idpf/idpf_txrx.c"
    ],
    "versions": [
      {
        "version": "6.7",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.7",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10.5",
        "lessThanOrEqual": "6.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.11",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]