CVE-2024-26884

2024-04-1711:15:10

CWE-119

Linux

web.nvd.nist.gov

linux kernel

hashtab overflow

vulnerability

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

6.7

Confidence

Low

EPSS

Percentile

5.1%

JSON

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

bpf: Fix hashtab overflow check on 32-bit arches

The hashtab code relies on roundup_pow_of_two() to compute the number of
hash buckets, and contains an overflow check by checking if the
resulting value is 0. However, on 32-bit arches, the roundup code itself
can overflow by doing a 32-bit left-shift of an unsigned long value,
which is undefined behaviour, so it is not guaranteed to truncate
neatly. This was triggered by syzbot on the DEVMAP_HASH type, which
contains the same check, copied from the hashtab code. So apply the same
fix to hashtab, by moving the overflow check to before the roundup.

Affected configurations

Nvd

Vulners

Node

linuxlinux_kernelRange3.19–4.19.311

linuxlinux_kernelRange4.20–5.4.273

linuxlinux_kernelRange5.5–5.10.214

linuxlinux_kernelRange5.11–5.15.153

linuxlinux_kernelRange5.16–6.1.83

linuxlinux_kernelRange6.2–6.6.23

linuxlinux_kernelRange6.7–6.7.11

linuxlinux_kernelRange6.8–6.8.2

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/bpf/hashtab.c"
    ],
    "versions": [
      {
        "version": "daaf427c6ab3",
        "lessThan": "33ec04cadb77",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "daaf427c6ab3",
        "lessThan": "92c81fbb3ed2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "daaf427c6ab3",
        "lessThan": "64f00b4df059",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "daaf427c6ab3",
        "lessThan": "3b08cfc65f07",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "daaf427c6ab3",
        "lessThan": "a83fdaeaea36",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "daaf427c6ab3",
        "lessThan": "8435f0961bf3",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "daaf427c6ab3",
        "lessThan": "d817f0d34d92",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "daaf427c6ab3",
        "lessThan": "a6fa75b5096c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "daaf427c6ab3",
        "lessThan": "6787d916c2cf",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/bpf/hashtab.c"
    ],
    "versions": [
      {
        "version": "3.19",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.19",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.311",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.273",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.214",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.153",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.83",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.23",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.7.11",
        "lessThanOrEqual": "6.7.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.2",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]