{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2024-36892",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-05-30T15:25:07.065Z",
        "datePublished": "2024-05-30T15:28:58.528Z",
        "dateUpdated": "2024-08-02T03:43:49.159Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2024-05-30T15:28:58.528Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/slub: avoid zeroing outside-object freepointer for single free\n\nCommit 284f17ac13fe (\"mm/slub: handle bulk and single object freeing\nseparately\") splits single and bulk object freeing in two functions\nslab_free() and slab_free_bulk() which leads slab_free() to call\nslab_free_hook() directly instead of slab_free_freelist_hook().\n\nIf `init_on_free` is set, slab_free_hook() zeroes the object.\nAfterward, if `slub_debug=F` and `CONFIG_SLAB_FREELIST_HARDENED` are\nset, the do_slab_free() slowpath executes freelist consistency\nchecks and try to decode a zeroed freepointer which leads to a\n\"Freepointer corrupt\" detection in check_object().\n\nDuring bulk free, slab_free_freelist_hook() isn't affected as it always\nsets it objects freepointer using set_freepointer() to maintain its\nreconstructed freelist after `init_on_free`.\n\nFor single free, object's freepointer thus needs to be avoided when\nstored outside the object if `init_on_free` is set. The freepointer left\nas is, check_object() may later detect an invalid pointer value due to\nobjects overflow.\n\nTo reproduce, set `slub_debug=FU init_on_free=1 log_level=7` on the\ncommand line of a kernel build with `CONFIG_SLAB_FREELIST_HARDENED=y`.\n\ndmesg sample log:\n[   10.708715] =============================================================================\n[   10.710323] BUG kmalloc-rnd-05-32 (Tainted: G    B           T ): Freepointer corrupt\n[   10.712695] -----------------------------------------------------------------------------\n[   10.712695]\n[   10.712695] Slab 0xffffd8bdc400d580 objects=32 used=4 fp=0xffff9d9a80356f80 flags=0x200000000000a00(workingset|slab|node=0|zone=2)\n[   10.716698] Object 0xffff9d9a80356600 @offset=1536 fp=0x7ee4f480ce0ecd7c\n[   10.716698]\n[   10.716698] Bytes b4 ffff9d9a803565f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n[   10.720703] Object   ffff9d9a80356600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n[   10.720703] Object   ffff9d9a80356610: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n[   10.724696] Padding  ffff9d9a8035666c: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n[   10.724696] Padding  ffff9d9a8035667c: 00 00 00 00                                      ....\n[   10.724696] FIX kmalloc-rnd-05-32: Object at 0xffff9d9a80356600 not freed"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "mm/slub.c"
                    ],
                    "versions": [
                        {
                            "version": "284f17ac13fe",
                            "lessThan": "56900355485f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "284f17ac13fe",
                            "lessThan": "8f828aa48812",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "mm/slub.c"
                    ],
                    "versions": [
                        {
                            "version": "6.8",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.8",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.8.10",
                            "lessThanOrEqual": "6.8.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.9",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/56900355485f6e82114b18c812edd57fd7970dcb"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8f828aa48812ced28aa39cb3cfe55ef2444d03dd"
                }
            ],
            "title": "mm/slub: avoid zeroing outside-object freepointer for single free",
            "x_generator": {
                "engine": "bippy-a5840b7849dd"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2024-06-10T18:49:22.924151Z",
                                "id": "CVE-2024-36892",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2024-07-30T15:12:52.190Z"
                }
            },
            {
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2024-08-02T03:43:49.159Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "https://git.kernel.org/stable/c/56900355485f6e82114b18c812edd57fd7970dcb",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://git.kernel.org/stable/c/8f828aa48812ced28aa39cb3cfe55ef2444d03dd",
                        "tags": [
                            "x_transferred"
                        ]
                    }
                ]
            }
        ]
    }
}