CVE-2023-53995 (GCVE-0-2023-53995)
Vulnerability from cvelistv5 – Published: 2025-12-24 10:55 – Updated: 2026-05-11 19:53
VLAI
EPSS
VEX
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
6 references
Impacted products
2 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) |
guessed | |
| 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) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/ipv4/devinet.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "5624f26a3574500ce23929cb2c9976a0dec9920a",
"status": "affected",
"version": "0ff60a45678e67b2547256a636fd00c1667ce4fa",
"versionType": "git"
},
{
"lessThan": "7c8ddcdab1b900bed69cad6beef477fff116289e",
"status": "affected",
"version": "0ff60a45678e67b2547256a636fd00c1667ce4fa",
"versionType": "git"
},
{
"lessThan": "2f1e86014d0cc084886c36a2d77bc620e2d42618",
"status": "affected",
"version": "0ff60a45678e67b2547256a636fd00c1667ce4fa",
"versionType": "git"
},
{
"lessThan": "980f8445479814509a3cd55a8eabaae1c9030a4c",
"status": "affected",
"version": "0ff60a45678e67b2547256a636fd00c1667ce4fa",
"versionType": "git"
},
{
"lessThan": "42652af5360d30b43b06057c193739e7dfb18f42",
"status": "affected",
"version": "0ff60a45678e67b2547256a636fd00c1667ce4fa",
"versionType": "git"
},
{
"lessThan": "ac28b1ec6135649b5d78b028e47264cb3ebca5ea",
"status": "affected",
"version": "0ff60a45678e67b2547256a636fd00c1667ce4fa",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/ipv4/devinet.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.15"
},
{
"lessThan": "2.6.15",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.257",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.195",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.132",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.54",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.5.*",
"status": "unaffected",
"version": "6.5.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.6",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.257",
"versionStartIncluding": "2.6.15",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.195",
"versionStartIncluding": "2.6.15",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.132",
"versionStartIncluding": "2.6.15",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.54",
"versionStartIncluding": "2.6.15",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.5.4",
"versionStartIncluding": "2.6.15",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6",
"versionStartIncluding": "2.6.15",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"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"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/5624f26a3574500ce23929cb2c9976a0dec9920a"
},
{
"url": "https://git.kernel.org/stable/c/7c8ddcdab1b900bed69cad6beef477fff116289e"
},
{
"url": "https://git.kernel.org/stable/c/2f1e86014d0cc084886c36a2d77bc620e2d42618"
},
{
"url": "https://git.kernel.org/stable/c/980f8445479814509a3cd55a8eabaae1c9030a4c"
},
{
"url": "https://git.kernel.org/stable/c/42652af5360d30b43b06057c193739e7dfb18f42"
},
{
"url": "https://git.kernel.org/stable/c/ac28b1ec6135649b5d78b028e47264cb3ebca5ea"
}
],
"title": "net: ipv4: fix one memleak in __inet_del_ifa()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"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"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2023-53995",
"date": "2026-09-18",
"epss": "0.00203",
"percentile": "0.10573"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/ipv4/devinet.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "5624f26a3574500ce23929cb2c9976a0dec9920a",
"status": "affected",
"version": "0ff60a45678e67b2547256a636fd00c1667ce4fa",
"versionType": "git"
},
{
"lessThan": "7c8ddcdab1b900bed69cad6beef477fff116289e",
"status": "affected",
"version": "0ff60a45678e67b2547256a636fd00c1667ce4fa",
"versionType": "git"
},
{
"lessThan": "2f1e86014d0cc084886c36a2d77bc620e2d42618",
"status": "affected",
"version": "0ff60a45678e67b2547256a636fd00c1667ce4fa",
"versionType": "git"
},
{
"lessThan": "980f8445479814509a3cd55a8eabaae1c9030a4c",
"status": "affected",
"version": "0ff60a45678e67b2547256a636fd00c1667ce4fa",
"versionType": "git"
},
{
"lessThan": "42652af5360d30b43b06057c193739e7dfb18f42",
"status": "affected",
"version": "0ff60a45678e67b2547256a636fd00c1667ce4fa",
"versionType": "git"
},
{
"lessThan": "ac28b1ec6135649b5d78b028e47264cb3ebca5ea",
"status": "affected",
"version": "0ff60a45678e67b2547256a636fd00c1667ce4fa",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/ipv4/devinet.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.15"
},
{
"lessThan": "2.6.15",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.257",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.195",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.132",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.54",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.5.*",
"status": "unaffected",
"version": "6.5.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.6",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"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."
}
],
"id": "CVE-2023-53995",
"lastModified": "2026-06-17T06:46:30.293",
"metrics": {},
"published": "2025-12-24T11:15:52.403",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/2f1e86014d0cc084886c36a2d77bc620e2d42618"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/42652af5360d30b43b06057c193739e7dfb18f42"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/5624f26a3574500ce23929cb2c9976a0dec9920a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/7c8ddcdab1b900bed69cad6beef477fff116289e"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/980f8445479814509a3cd55a8eabaae1c9030a4c"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/ac28b1ec6135649b5d78b028e47264cb3ebca5ea"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
},
"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"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
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