{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43216",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:55.993Z",
        "datePublished": "2026-05-06T11:28:18.277Z",
        "dateUpdated": "2026-07-24T14:33:35.358Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-07-24T14:33:35.358Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: Drop the lock in skb_may_tx_timestamp()\n\nskb_may_tx_timestamp() may acquire sock::sk_callback_lock. The lock must\nnot be taken in IRQ context, only softirq is okay. A few drivers receive\nthe timestamp via a dedicated interrupt and complete the TX timestamp\nfrom that handler. This will lead to a deadlock if the lock is already\nwrite-locked on the same CPU.\n\nTaking the lock can be avoided. The socket (pointed by the skb) will\nremain valid until the skb is released. The ->sk_socket and ->file\nmember will be set to NULL once the user closes the socket which may\nhappen before the timestamp arrives.\nIf we happen to observe the pointer while the socket is closing but\nbefore the pointer is set to NULL then we may use it because both\npointer (and the file's cred member) are RCU freed.\n\nDrop the lock. Use READ_ONCE() to obtain the individual pointer. Add a\nmatching WRITE_ONCE() where the pointer are cleared."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "include/net/sock.h",
                        "net/core/skbuff.c",
                        "net/socket.c"
                    ],
                    "versions": [
                        {
                            "version": "b245be1f4db1a0394e4b6eb66059814b46670ac3",
                            "lessThan": "4839cbda8f13e99ce2bb3b593f5cc3288415684b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b245be1f4db1a0394e4b6eb66059814b46670ac3",
                            "lessThan": "3709d73ace37e9aaebb688f5a5cf706d74350b64",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b245be1f4db1a0394e4b6eb66059814b46670ac3",
                            "lessThan": "cf7599116c4c0082fd25cb1bf0254631da0ed06e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b245be1f4db1a0394e4b6eb66059814b46670ac3",
                            "lessThan": "cd2463ec60f0d6e460078037c86f9d0947ee1ff6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b245be1f4db1a0394e4b6eb66059814b46670ac3",
                            "lessThan": "c770217044d9cbe16a1f7c385cf080ed06a2fc04",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b245be1f4db1a0394e4b6eb66059814b46670ac3",
                            "lessThan": "f3e4cceafad27c9363c33622732f86722846ec6f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b245be1f4db1a0394e4b6eb66059814b46670ac3",
                            "lessThan": "e4c6efb3b70ff87f1df99efce2f8893717695718",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b245be1f4db1a0394e4b6eb66059814b46670ac3",
                            "lessThan": "983512f3a87fd8dc4c94dfa6b596b6e57df5aad7",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "include/net/sock.h",
                        "net/core/skbuff.c",
                        "net/socket.c"
                    ],
                    "versions": [
                        {
                            "version": "4.0",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.0",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.261",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.212",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.178",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.145",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.95",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.16",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.6",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.0",
                                    "versionEndExcluding": "5.10.261"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.0",
                                    "versionEndExcluding": "5.15.212"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.0",
                                    "versionEndExcluding": "6.1.178"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.0",
                                    "versionEndExcluding": "6.6.145"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.0",
                                    "versionEndExcluding": "6.12.95"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.0",
                                    "versionEndExcluding": "6.18.16"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.0",
                                    "versionEndExcluding": "6.19.6"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.0",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/4839cbda8f13e99ce2bb3b593f5cc3288415684b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3709d73ace37e9aaebb688f5a5cf706d74350b64"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cf7599116c4c0082fd25cb1bf0254631da0ed06e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cd2463ec60f0d6e460078037c86f9d0947ee1ff6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c770217044d9cbe16a1f7c385cf080ed06a2fc04"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f3e4cceafad27c9363c33622732f86722846ec6f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e4c6efb3b70ff87f1df99efce2f8893717695718"
                },
                {
                    "url": "https://git.kernel.org/stable/c/983512f3a87fd8dc4c94dfa6b596b6e57df5aad7"
                }
            ],
            "title": "net: Drop the lock in skb_may_tx_timestamp()",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}