netfilter: nftables: exthdr: fix 4-byte stack OOB write
In the Linux kernel, the following vulnerability has been resolved: netfilter: nftables: exthdr: fix 4-byte stack OOB write If priv->len is a multiple of 4, then dst[len / 4] can write past the destination array which leads to stack corruption. This construct is necessary to clean the remainder of the register in case ->len is NOT a multiple of the register size, so make it conditional just like nft_payload.c does. The bug was added in 4.1 cycle and then copied/inherited when tcp/sctp and ip option support was added. Bug reported by Zero Day Initiative project (ZDI-CAN-21950, ZDI-CAN-21951, ZDI-CAN-21961).
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 4.19.316, 5.10.198, 5.15.132, 5.4.279, 6.1.54, 6.5.4
- CVEs
- CVE-2023-52628
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 10:43 UTC · Revision 1
Source evidence
netfilter: nftables: exthdr: fix 4-byte stack OOB write
core-osv · Original sourcePublished 28 Mar 2024, 07:33 UTC
In the Linux kernel, the following vulnerability has been resolved: netfilter: nftables: exthdr: fix 4-byte stack OOB write If priv->len is a multiple of 4, then dst[len / 4] can write past the destination array which leads to stack corruption. This construct is necessary to clean the remainder of the register in case ->len is NOT a multiple of the register size, so make it conditional just like nft_payload.c does. The bug was added in 4.1 cycle and then copied/inherited when tcp/sctp and ip option support was added. Bug reported by Zero Day Initiative project (ZDI-CAN-21950, ZDI-CAN-21951, ZDI-CAN-21961).
osv:CVE-2023-52628
Kernel
Fixed versions: 4.19.316, 5.4.279, 5.10.198, 5.15.132, 6.1.54, 6.5.4
Complete source record
{
"id": "beb8227bbfde286930a680d8e86195e6b634bb2a6e1fa9a7951a9d43d461ef03",
"url": "https://osv.dev/vulnerability/CVE-2023-52628",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "netfilter: nftables: exthdr: fix 4-byte stack OOB write",
"summary": "In the Linux kernel, the following vulnerability has been resolved: netfilter: nftables: exthdr: fix 4-byte stack OOB write If priv->len is a multiple of 4, then dst[len / 4] can write past the destination array which leads to stack corruption. This construct is necessary to clean the remainder of the register in case ->len is NOT a multiple of the register size, so make it conditional just like nft_payload.c does. The bug was added in 4.1 cycle and then copied/inherited when tcp/sctp and ip option support was added. Bug reported by Zero Day Initiative project (ZDI-CAN-21950, ZDI-CAN-21951, ZDI-CAN-21961).",
"evidence": "osv:CVE-2023-52628",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.19.316",
"evidence": "/affected/1/ranges"
},
{
"value": "5.4.279",
"evidence": "/affected/1/ranges"
},
{
"value": "5.10.198",
"evidence": "/affected/1/ranges"
},
{
"value": "5.15.132",
"evidence": "/affected/1/ranges"
},
{
"value": "6.1.54",
"evidence": "/affected/1/ranges"
},
{
"value": "6.5.4",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "CVE-2023-52628",
"aliases": [
"CVE-2023-52628"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "49499c3e6e18b7677a63316f3ff54a16533dc28f"
},
{
"fixed": "28a97c43c9e32f437ebb8d6126f9bb7f3ca9521a"
},
{
"fixed": "cf39c4f77a773a547ac2bcf30ecdd303bb0c80cb"
},
{
"fixed": "a7d86a77c33ba1c357a7504341172cc1507f0698"
},
{
"fixed": "1ad7b189cc1411048434e8595ffcbe7873b71082"
},
{
"fixed": "d9ebfc0f21377690837ebbd119e679243e0099cc"
},
{
"fixed": "c8f292322ff16b9a2272a67de396c09a50e09dce"
},
{
"fixed": "fd94d9dadee58e09b49075240fe83423eb1dcd36"
}
]
}
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52628.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.1.0"
},
{
"fixed": "4.19.316"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.20.0"
},
{
"fixed": "5.4.279"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.5.0"
},
{
"fixed": "5.10.198"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.11.0"
},
{
"fixed": "5.15.132"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.16.0"
},
{
"fixed": "6.1.54"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.2.0"
},
{
"fixed": "6.5.4"
}
]
}
],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52628.json"
}
}
],
"modified": "2026-10-28T02:30:43.901544653Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/1ad7b189cc1411048434e8595ffcbe7873b71082",
"https://git.kernel.org/stable/c/28a97c43c9e32f437ebb8d6126f9bb7f3ca9521a",
"https://git.kernel.org/stable/c/a7d86a77c33ba1c357a7504341172cc1507f0698",
"https://git.kernel.org/stable/c/c8f292322ff16b9a2272a67de396c09a50e09dce",
"https://git.kernel.org/stable/c/cf39c4f77a773a547ac2bcf30ecdd303bb0c80cb",
"https://git.kernel.org/stable/c/d9ebfc0f21377690837ebbd119e679243e0099cc",
"https://git.kernel.org/stable/c/fd94d9dadee58e09b49075240fe83423eb1dcd36",
"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52628.json",
"https://nvd.nist.gov/vuln/detail/CVE-2023-52628",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52628.json"
}
},
"related_cves": [
{
"value": "CVE-2023-52628",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 511663,
"published_at": "2024-03-28T07:33:46.217+00:00"
}