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net/packet: fix TOCTOU race on mmap'd vnet_hdr in tpacket_snd()

Exact source revision recorded 23 Oct 2026 15:48:27 UTC. It does not establish the source's current position. Latest evidence.

cve-program · CVE-2026-31700

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/packet/af_packet.c"
                    ],
                    "versions": [
                        {
                            "version": "1d036d25e5609ba73fee6a88db01c306b140d512",
                            "lessThan": "0f4c9754956b86de158a4af5278c5cf5bda9439e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1d036d25e5609ba73fee6a88db01c306b140d512",
                            "lessThan": "714aa973da8163925eda7efd49361ccbee21ee46",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1d036d25e5609ba73fee6a88db01c306b140d512",
                            "lessThan": "1490f82353bdabc09265a74e645b07f05cf4188e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1d036d25e5609ba73fee6a88db01c306b140d512",
                            "lessThan": "74e2db36fe50e3ad9d5300d7fd0e6e2a15a6d121",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1d036d25e5609ba73fee6a88db01c306b140d512",
                            "lessThan": "3a1bf9116ea31470b89692585c3910dfe830dcdd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1d036d25e5609ba73fee6a88db01c306b140d512",
                            "lessThan": "28324a3b62d9ce7f9bdd65a8ce63f382041d1b27",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1d036d25e5609ba73fee6a88db01c306b140d512",
                            "lessThan": "48a6ef291a17639e1b6ae0fbe9c8b2bb87d7804b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1d036d25e5609ba73fee6a88db01c306b140d512",
                            "lessThan": "2c054e17d9d41f1020376806c7f750834ced4dc5",
                            "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/packet/af_packet.c"
                    ],
                    "versions": [
                        {
                            "version": "4.6",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.6",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.259",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.210",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.176",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.136",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.84",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.25",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.2",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

ChangeIntel

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Sources read 8 Nov 21:05 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current