CVE-2023-53995 (GCVE-0-2023-53995)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:55 – Updated: 2026-05-11 19:53
VLAI
Title
net: ipv4: fix one memleak in __inet_del_ifa()
Summary
In the Linux kernel, the following vulnerability has been resolved: net: ipv4: fix one memleak in __inet_del_ifa() I got the below warning when do fuzzing test: unregister_netdevice: waiting for bond0 to become free. Usage count = 2 It can be repoduced via: ip link add bond0 type bond sysctl -w net.ipv4.conf.bond0.promote_secondaries=1 ip addr add 4.117.174.103/0 scope 0x40 dev bond0 ip addr add 192.168.100.111/255.255.255.254 scope 0 dev bond0 ip addr add 0.0.0.4/0 scope 0x40 secondary dev bond0 ip addr del 4.117.174.103/0 scope 0x40 dev bond0 ip link delete bond0 type bond In this reproduction test case, an incorrect 'last_prim' is found in __inet_del_ifa(), as a result, the secondary address(0.0.0.4/0 scope 0x40) is lost. The memory of the secondary address is leaked and the reference of in_device and net_device is leaked. Fix this problem: Look for 'last_prim' starting at location of the deleted IP and inserting the promoted IP into the location of 'last_prim'.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0ff60a45678e67b2547256a636fd00c1667ce4fa , < 5624f26a3574500ce23929cb2c9976a0dec9920a (git)
Affected: 0ff60a45678e67b2547256a636fd00c1667ce4fa , < 7c8ddcdab1b900bed69cad6beef477fff116289e (git)
Affected: 0ff60a45678e67b2547256a636fd00c1667ce4fa , < 2f1e86014d0cc084886c36a2d77bc620e2d42618 (git)
Affected: 0ff60a45678e67b2547256a636fd00c1667ce4fa , < 980f8445479814509a3cd55a8eabaae1c9030a4c (git)
Affected: 0ff60a45678e67b2547256a636fd00c1667ce4fa , < 42652af5360d30b43b06057c193739e7dfb18f42 (git)
Affected: 0ff60a45678e67b2547256a636fd00c1667ce4fa , < ac28b1ec6135649b5d78b028e47264cb3ebca5ea (git)
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Linux Linux Affected: 2.6.15
Unaffected: 0 , < 2.6.15 (semver)
Unaffected: 5.4.257 , ≤ 5.4.* (semver)
Unaffected: 5.10.195 , ≤ 5.10.* (semver)
Unaffected: 5.15.132 , ≤ 5.15.* (semver)
Unaffected: 6.1.54 , ≤ 6.1.* (semver)
Unaffected: 6.5.4 , ≤ 6.5.* (semver)
Unaffected: 6.6 , ≤ * (original_commit_for_fix)
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{
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      "cpeApplicability": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipv4: fix one memleak in __inet_del_ifa()\n\nI got the below warning when do fuzzing test:\nunregister_netdevice: waiting for bond0 to become free. Usage count = 2\n\nIt can be repoduced via:\n\nip link add bond0 type bond\nsysctl -w net.ipv4.conf.bond0.promote_secondaries=1\nip addr add 4.117.174.103/0 scope 0x40 dev bond0\nip addr add 192.168.100.111/255.255.255.254 scope 0 dev bond0\nip addr add 0.0.0.4/0 scope 0x40 secondary dev bond0\nip addr del 4.117.174.103/0 scope 0x40 dev bond0\nip link delete bond0 type bond\n\nIn this reproduction test case, an incorrect \u0027last_prim\u0027 is found in\n__inet_del_ifa(), as a result, the secondary address(0.0.0.4/0 scope 0x40)\nis lost. The memory of the secondary address is leaked and the reference of\nin_device and net_device is leaked.\n\nFix this problem:\nLook for \u0027last_prim\u0027 starting at location of the deleted IP and inserting\nthe promoted IP into the location of \u0027last_prim\u0027."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:53:15.262Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/5624f26a3574500ce23929cb2c9976a0dec9920a"
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          "url": "https://git.kernel.org/stable/c/7c8ddcdab1b900bed69cad6beef477fff116289e"
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        {
          "url": "https://git.kernel.org/stable/c/ac28b1ec6135649b5d78b028e47264cb3ebca5ea"
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    "cveId": "CVE-2023-53995",
    "datePublished": "2025-12-24T10:55:32.713Z",
    "dateReserved": "2025-12-24T10:53:46.176Z",
    "dateUpdated": "2026-05-11T19:53:15.262Z",
    "state": "PUBLISHED"
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      "date": "2026-08-28",
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    },
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T22:39:33+00:00",
      "cve": "CVE-2023-53995",
      "id": "CVE-2023-53995",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "399",
      "product_status:known_affected": "80",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Denial of Service due to memory leak in IP address deletion",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53995.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-22T01:54:06Z",
      "cve": "CVE-2023-53995",
      "id": "CVE-2023-53995",
      "initial_release_date": "2025-12-25T00:58:08Z",
      "product_status:first_fixed": "59",
      "product_status:known_affected": "539",
      "product_status:known_not_affected": "77",
      "product_status:recommended": "457",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53995",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53995.json",
      "version": "40"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.