{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53163",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.388Z",
        "datePublished": "2026-06-25T08:38:44.108Z",
        "dateUpdated": "2026-07-24T14:33:48.972Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-07-24T14:33:48.972Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlocking/rtmutex: Skip remove_waiter() when waiter is not enqueued\n\nsyzbot triggered the following splat in remove_waiter() via\nFUTEX_CMP_REQUEUE_PI:\n\n  KASAN: null-ptr-deref in range [0x0000000000000a88-0x0000000000000a8f]\n   class_raw_spinlock_constructor\n   remove_waiter+0x159/0x1200 kernel/locking/rtmutex.c:1561\n   rt_mutex_start_proxy_lock+0x103/0x120\n   futex_requeue+0x10e4/0x20d0\n   __x64_sys_futex+0x34f/0x4d0\n\ntask_blocks_on_rt_mutex() does not arm the waiter upon deadlock detection,\nleaving waiter->task nil, where 3bfdc63936dd (\"rtmutex: Use waiter::task instead\nof current in remove_waiter()\") made this fatal.\n\nFurthermore, rt_mutex_start_proxy_lock() should not be calling into remove_waiter()\nupon a successfully grabbing the rtmutex. 1a1fb985f2e2 (\"futex: Handle early deadlock\nreturn correctly\"), moved the remove_waiter() out of __rt_mutex_start_proxy_lock()\n(where 'ret' was only ever 0 or < 0) into the wrapper. Tighten this check to\naccount for try_to_take_rt_mutex()."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/locking/rtmutex.c",
                        "kernel/locking/rtmutex_api.c"
                    ],
                    "versions": [
                        {
                            "version": "f3fa3424bceb128d2be4b3745506b22844b87db7",
                            "lessThan": "bfbc047ceb42c0e1fac8f3a155d4548a8bbe76b1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "838ce5cb5d93c3ab8b27e75bc6ad905a94b752fd",
                            "lessThan": "4ffacf76a457b7ca8ac05f5df8740b0d8f53574a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d8cce4773c2b23d819baf5abedc62f7b430e8745",
                            "lessThan": "4afda3a1da02129568a3a2f1898aa13e6763bcba",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8a1fc8d698ac5e5916e3082a0f74450d71f9611f",
                            "lessThan": "6707d7e0b71748cb3cd95bad81dae5fe1b3c8f48",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6d52dfcb2a5db86e346cf51f8fcf2071b8085166",
                            "lessThan": "5799f9bd7fee40370b93ab1ddf001cdc7017c14d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3fb7394a837740770f0d6b4b30567e60786a63f2",
                            "lessThan": "a388e3dfaf9538a680de5ed43a8ebb5dd45b6e53",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "88614876370aac8ad1050ad785a4c095ba17ac11",
                            "lessThan": "55363fa0a04524d11efeaadee734d2db1756ed27",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3bfdc63936dd4773109b7b8c280c0f3b5ae7d349",
                            "lessThan": "40a25d59e85b3c8709ac2424d44f65610467871e",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/locking/rtmutex.c",
                        "kernel/locking/rtmutex_api.c"
                    ],
                    "versions": [
                        {
                            "version": "6.1.175",
                            "lessThan": "6.1.177",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.140",
                            "lessThan": "6.6.144",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.86",
                            "lessThan": "6.12.95",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.27",
                            "lessThan": "6.18.36",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.4",
                            "lessThan": "7.0.13",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1.175",
                                    "versionEndExcluding": "6.1.177"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6.140",
                                    "versionEndExcluding": "6.6.144"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.12.86",
                                    "versionEndExcluding": "6.12.95"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.18.27",
                                    "versionEndExcluding": "6.18.36"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "7.0.4",
                                    "versionEndExcluding": "7.0.13"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/bfbc047ceb42c0e1fac8f3a155d4548a8bbe76b1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4ffacf76a457b7ca8ac05f5df8740b0d8f53574a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4afda3a1da02129568a3a2f1898aa13e6763bcba"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6707d7e0b71748cb3cd95bad81dae5fe1b3c8f48"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5799f9bd7fee40370b93ab1ddf001cdc7017c14d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a388e3dfaf9538a680de5ed43a8ebb5dd45b6e53"
                },
                {
                    "url": "https://git.kernel.org/stable/c/55363fa0a04524d11efeaadee734d2db1756ed27"
                },
                {
                    "url": "https://git.kernel.org/stable/c/40a25d59e85b3c8709ac2424d44f65610467871e"
                }
            ],
            "title": "locking/rtmutex: Skip remove_waiter() when waiter is not enqueued",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}