CVE-2026-98873ModerateLocalRevised 26 Oct

netfilter: nf_conntrack_expect: zero at allocation time

MSRC advisory NVD CVE.org

Assessment

Severity: Moderate
CVSS base score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U
Impact: Not stated
EPSS, next 30 days: Not scored yet
Public exploit code: No Nuclei template lists it
Exploitability: Not assessed
Publicly disclosed: No
Customer action: Required: apply the update
Component: Mariner
Weakness: —
Issued by: Linux
Published: 24 Oct 2026 · October 2026
Last revised: 26 Oct 2026Information published.

CVSS 3.1 base metricsRed raises the risk · green lowers it

Attack vector: LocalAV:L
Attack complexity: LowAC:L
Privileges required: LowPR:L
User interaction: NoneUI:N
Scope: UnchangedS:U
Confidentiality: NoneC:N
Integrity: NoneI:N
Availability: HighA:H

Updates that fix it

0 KBs

No KB listed

MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.

Affected products

1 affected product

azl3 kernel 6.6.157.1-1 on Azure Linux 3.0

Page history

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Cite this version

Field-level log (2)

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26 Oct 2026 · 07:26:10 UTC Last revised24 Oct 2026 14:45 UTC → 26 Oct 2026 01:03 UTC
25 Oct 2026 · 07:41:18 UTC Last revised24 Oct 2026 01:03 UTC → 24 Oct 2026 14:45 UTC

Explore global source statements, affected packages and advisory history for CVE-2026-98873. The catalog has a separate collection scope from Microsoft release records.

cve-program · CVE-2026-98873

Published

Linux

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/netfilter/nf_conntrack_expect.c",
                        "net/netfilter/nf_conntrack_netlink.c"
                    ],
                    "versions": [
                        {
                            "version": "076a0ca02644657b13e4af363f487ced2942e9cb",
                            "lessThan": "39cb6ff947c16a576ea68c5f272e634acdcb0085",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "076a0ca02644657b13e4af363f487ced2942e9cb",
                            "lessThan": "90545aa07a183887e9d72ce573c18e08f62e2c91",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "076a0ca02644657b13e4af363f487ced2942e9cb",
                            "lessThan": "9c11d7ea5ff4dbe162e79f00188814ef5483c295",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "076a0ca02644657b13e4af363f487ced2942e9cb",
                            "lessThan": "b7f3ee925aee9f1f547d539bc03c35433c238958",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "076a0ca02644657b13e4af363f487ced2942e9cb",
                            "lessThan": "824397af7bfe14edad374c64253dae0187ca623d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "076a0ca02644657b13e4af363f487ced2942e9cb",
                            "lessThan": "a39ecb856514274c80d0fac4d128dba6b266a8ed",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "076a0ca02644657b13e4af363f487ced2942e9cb",
                            "lessThan": "241ccd2fed9051db443aadce248fc0ab30f55e97",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                }

Linux

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/netfilter/nf_conntrack_expect.c",
                        "net/netfilter/nf_conntrack_netlink.c"
                    ],
                    "versions": [
                        {
                            "version": "3.4",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.4",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.271",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.222",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.189",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.158",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.111",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.53",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }