CVE-2026-99057ModerateAdjacentRevised 26 Oct

xen/netfront: don't leak the skb when xennet_fill_frags() fails

MSRC advisory NVD CVE.org

Assessment

Severity: Moderate
CVSS base score: 4.5CVSS:3.1/AV:A/AC:L/PR:H/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: AdjacentAV:A
Attack complexity: LowAC:L
Privileges required: HighPR:H
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

Open Source Software

1 affected product

azl3 kernel 6.6.157.1-1 on Azure Linux 3.0

Page history

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cve-program · CVE-2026-99057

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": [
                        "drivers/net/xen-netfront.c"
                    ],
                    "versions": [
                        {
                            "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c",
                            "lessThan": "5051df031144753d3e18862514969146b601d089",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c",
                            "lessThan": "99011a11c97340ef7290df7dc199305c73fab2f2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c",
                            "lessThan": "086944c1c2cbb683543bc3ff08637847b03c8009",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c",
                            "lessThan": "84e3ea6502b5f14ce8d499d0b6e0e38386274cf0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c",
                            "lessThan": "93ccaf1c26e2133396173b76a071e59024daa622",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bd1468048aa3e2af865da92990539946d4483989",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "29a6193c0d74390c004808441061ac1812cf6f51",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7eced4478f4ec6ff0a603ddfd6e24a5d3831fca7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b73a161e9beff24bf1803ba393dff95a255268f9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4.4.159",
                            "lessThan": "4.5",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.9.130",
                            "lessThan": "4.10",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.14.73",
                            "lessThan": "4.15",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.18.11",
                            "lessThan": "4.19",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }

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": [
                        "drivers/net/xen-netfront.c"
                    ],
                    "versions": [
                        {
                            "version": "4.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.113",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.57",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.11",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }