CVE-2023-52581

2024-03-0222:15:49

Linux

web.nvd.nist.gov

cve

2023

52581

linux kernel

netfilter

vulnerability fix

memleak

nf_tables

AI Score

6.2

Confidence

Low

EPSS

Percentile

10.3%

JSON

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

netfilter: nf_tables: fix memleak when more than 255 elements expired

When more than 255 elements expired we’re supposed to switch to a new gc
container structure.

This never happens: u8 type will wrap before reaching the boundary
and nft_trans_gc_space() always returns true.

This means we recycle the initial gc container structure and
lose track of the elements that came before.

While at it, don’t deref ‘gc’ after we’ve passed it to call_rcu.

Affected configurations

Vulners

Node

linuxlinux_kernelRange6.5–6.5.6

linuxlinux_kernelRange6.6.0≥

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": [
      "include/net/netfilter/nf_tables.h",
      "net/netfilter/nf_tables_api.c"
    ],
    "versions": [
      {
        "version": "8da1b048f9a5",
        "lessThan": "7cf055b43756",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "bbdb3b65aa91",
        "lessThan": "a995a68e8a3b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "448be0774882",
        "lessThan": "09c85f2d21ab",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d19e8bf3ea41",
        "lessThan": "ef99506eaf1d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ea3eb9f2192e",
        "lessThan": "7e5d732e6902",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5f68718b34a5",
        "lessThan": "4aea243b6853",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5f68718b34a5",
        "lessThan": "cf5000a7787c",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "include/net/netfilter/nf_tables.h",
      "net/netfilter/nf_tables_api.c"
    ],
    "versions": [
      {
        "version": "6.5",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.5",
        "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"
      }
    ]
  }
]