{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-72126",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-09T03:40:39.907Z",
        "datePublished": "2026-08-15T05:53:03.642Z",
        "dateUpdated": "2026-08-15T05:53:03.642Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-15T05:53:03.642Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: isotp: use unconditional synchronize_rcu() in isotp_release()\n\nisotp_notify() unregisters the (RCU) CAN filters via can_rx_unregister()\nand clears so->bound without waiting for a grace period. isotp_release()\nuses so->bound to decide whether it needs to call synchronize_rcu()\nbefore cancelling so->rxtimer, so when NETDEV_UNREGISTER runs first it\nskips that synchronize_rcu() and can cancel the timer while an\nin-flight isotp_rcv() is still executing and about to re-arm it via\nisotp_send_fc(), leading to a use-after-free timer callback on the\nfreed socket.\n\nsakisho-bot remarked a problem with rtnl_lock held in isotp_notify(),\ntherefore make isotp_release() always call synchronize_rcu() before\ncancelling the timers, regardless of so->bound. This still closes the\noriginal race (isotp_notify() clearing so->bound without waiting for\nin-flight isotp_rcv() callers before isotp_release() cancels the RX\ntimer) without adding any RCU wait to the netdevice notifier path."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/can/isotp.c"
                    ],
                    "versions": [
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                            "version": "22bfa94db2ef6900c790884fa9461486516626e9",
                            "lessThan": "945d9894502cd9124f5d676181c542ed2000f7c0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "14a4696bc3118ba49da28f79280e1d55603aa737",
                            "lessThan": "59672aa4bcd8d32172c1ff6a179583981d6acabc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
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                            "lessThan": "15413a082df69175c2f96aeab4c26fe1ff7cff03",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
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                            "lessThan": "6280eda96e0707264849fa7d036fed873c1f8a6d",
                            "status": "affected",
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                        {
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                            "lessThan": "b88a511308779c225005d7994b8744561bdbafbc",
                            "status": "affected",
                            "versionType": "git"
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                        {
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                            "lessThan": "b8278ff605187ef3fa0f2705e93251cce4c4f8ee",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
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                            "lessThan": "9b1a02e0d980ac6b0e36a90378f847062f81d7e4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "80c6ddf771df2ef786f28c1ca5919b3f1080091b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ebf91625b3e404bd2b4b694c7ee71c1e8f8bd08f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.10.50",
                            "lessThan": "5.10.261",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.12.17",
                            "lessThan": "5.13",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.13.2",
                            "lessThan": "5.14",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/can/isotp.c"
                    ],
                    "versions": [
                        {
                            "version": "5.14",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.14",
                            "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": "6.12.97",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.40",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.5",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2-rc4",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
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                            "negate": false,
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/945d9894502cd9124f5d676181c542ed2000f7c0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/59672aa4bcd8d32172c1ff6a179583981d6acabc"
                },
                {
                    "url": "https://git.kernel.org/stable/c/15413a082df69175c2f96aeab4c26fe1ff7cff03"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6280eda96e0707264849fa7d036fed873c1f8a6d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cb6abc584a1bfab107ac003d64948a4aef1730aa"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b88a511308779c225005d7994b8744561bdbafbc"
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                    "url": "https://git.kernel.org/stable/c/b8278ff605187ef3fa0f2705e93251cce4c4f8ee"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9b1a02e0d980ac6b0e36a90378f847062f81d7e4"
                }
            ],
            "title": "can: isotp: use unconditional synchronize_rcu() in isotp_release()",
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}