{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-97900",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:18:58.200Z",
        "datePublished": "2026-09-25T10:22:28.057Z",
        "dateUpdated": "2026-10-19T09:10:26.649Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:10:26.649Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/drm_exec: fix up contended obj when num_objects is 0\n\ndrm_exec_prepare_array() silently returns success without calling\ndrm_exec_lock_contended() when num_objects is zero. This breaks the\ninvariant upheld by drm_exec_lock_obj(), where every entry point into\nthe locking sequence must first attempt to lock any previously\ncontended object before proceeding.\n\nDrivers that chain multiple drm_exec_prepare_array() calls per\ndrm_exec_until_all_locked() iteration (e.g. amdgpu's userq signal/wait\nioctls, which prepare separate read and write BO arrays) can pass an\nempty array for one of the two calls. If contention is hit while\npreparing the non-empty array, exec->contended is set and the loop\nretries; on retry, the empty-array call preceding it is a no-op that\nnever clears exec->contended, so drm_exec_retry_on_contention()\nimmediately jumps back to the top of the loop without ever reaching\nthe call that would resolve the contention. This spins forever.\n\nFix it by having drm_exec_prepare_array() call drm_exec_lock_contended()\ndirectly when num_objects is zero, so a pending contended object dont\nloop infinitely."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/gpu/drm/drm_exec.c"
                    ],
                    "versions": [
                        {
                            "version": "09593216bff15866f95c8ad406cb7fdcec1ee40a",
                            "lessThan": "506cfed91e50cc8055799480a2fde5a18f63a21c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "09593216bff15866f95c8ad406cb7fdcec1ee40a",
                            "lessThan": "831cd124ce99c3e61266bed30519d52f7c26abed",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "09593216bff15866f95c8ad406cb7fdcec1ee40a",
                            "lessThan": "f3e74866018dab793ebee1fdf0ef34f7271d1f8c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "09593216bff15866f95c8ad406cb7fdcec1ee40a",
                            "lessThan": "a565022c02f218ec9789c2baf4690792e7a48cbb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "09593216bff15866f95c8ad406cb7fdcec1ee40a",
                            "lessThan": "159720704d9d652b64390c11fb971e15b0a78d23",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/gpu/drm/drm_exec.c"
                    ],
                    "versions": [
                        {
                            "version": "6.6",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.6",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.158",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.111",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.53",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.7",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "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": "6.6",
                                    "versionEndExcluding": "6.6.158"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6",
                                    "versionEndExcluding": "6.12.111"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6",
                                    "versionEndExcluding": "6.18.53"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6",
                                    "versionEndExcluding": "7.2.7"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/506cfed91e50cc8055799480a2fde5a18f63a21c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/831cd124ce99c3e61266bed30519d52f7c26abed"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f3e74866018dab793ebee1fdf0ef34f7271d1f8c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a565022c02f218ec9789c2baf4690792e7a48cbb"
                },
                {
                    "url": "https://git.kernel.org/stable/c/159720704d9d652b64390c11fb971e15b0a78d23"
                }
            ],
            "title": "drm/drm_exec: fix up contended obj when num_objects is 0",
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                "engine": "bippy-1.2.0"
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    }
}