CVE-2026-99009ModerateLocalRevised 26 Oct

Bluetooth: RFCOMM: connect the session socket without rfcomm_mutex

MSRC advisory NVD CVE.org

Assessment

Severity: Moderate
CVSS base score: 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
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: 25 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: HighAC:H
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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Explore global source statements, affected packages and advisory history for CVE-2026-99009. The catalog has a separate collection scope from Microsoft release records.

cve-program · CVE-2026-99009

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": [
                        "include/net/bluetooth/rfcomm.h",
                        "net/bluetooth/rfcomm/core.c"
                    ],
                    "versions": [
                        {
                            "version": "82425b14f0fb22e46cfddc56d6465570f5ed0ce6",
                            "lessThan": "4dc3d5a004b8fd59f3c905631dbb18cb601b1b41",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1b7841ffad08e911e8c4b9470f3fa08423568940",
                            "lessThan": "d2206e8c78be69d21d4f5343c3e99fbaeef41cbb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "946d76db77ee5f922968ce558629ae47b381e3fc",
                            "lessThan": "cc7732b8549ecb6f02457edeb8db1f6d255e381c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "fbf7961964a6e93360179f64712320ae9a1e9577",
                            "lessThan": "f492de11b325446b0b11bc2eb86e1f546eaa61b6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "759c185d0bbdb131357408f50b8735e04ed3caff",
                            "lessThan": "ac022970e9fb0a5f7e7d1f6c8e104c1ed924dd1c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "62ce8b33eb238cf18c15207332fbdc26d858f592",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3873f3449701b3dc98cba577923be6493598e7a1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7ded3264106418c6456ccceaafd9fda596ce12c3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.10.270",
                            "lessThan": "5.11",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.221",
                            "lessThan": "5.16",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.188",
                            "lessThan": "6.2",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }

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": [
                        "include/net/bluetooth/rfcomm.h",
                        "net/bluetooth/rfcomm/core.c"
                    ],
                    "versions": [
                        {
                            "version": "6.6.157",
                            "lessThan": "6.6.160",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.109",
                            "lessThan": "6.12.114",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.50",
                            "lessThan": "6.18.58",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.4",
                            "lessThan": "7.2.11",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }