{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98856",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.376Z",
        "datePublished": "2026-10-18T15:51:12.359Z",
        "dateUpdated": "2026-10-21T12:57:35.270Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-21T12:57:35.270Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkprobes: Skip disarmed probes when checking optkprobe overlap\n\nOn x86, an optkprobe at A replaces five bytes with a jump. If a disabled\nprobe B is at A+2, get_optimized_kprobe() stops at B when arming a new\nprobe C at A+4. It leaves A optimized:\n\n              A    A+1  A+2  A+3  A+4\n  A's jump  | e9 | d0 | d1 | d2 | d3 |\n  after C   | e9 | d0 | d1 | d2 | cc |\n\nThe INT3 for C overwrites the last byte of A's jump displacement, so\nexecution can jump to the wrong address. B can have prepared optinsns\nwhile disarmed, but has no jump to unoptimize.\n\nContinue past disarmed and unprepared probes to find the active optimized\nprobe before arming a probe in its jump."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/kprobes.c"
                    ],
                    "versions": [
                        {
                            "version": "afd66255b9a48f5851326ddae50e2203fbf71dc9",
                            "lessThan": "3f968dcdf018861129f97910fa7bd680d939a9b0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afd66255b9a48f5851326ddae50e2203fbf71dc9",
                            "lessThan": "985a568171e7bdba6dcde3420d0e5bb515813457",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afd66255b9a48f5851326ddae50e2203fbf71dc9",
                            "lessThan": "6745fa65f4115045431c0c15610e876855a04625",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afd66255b9a48f5851326ddae50e2203fbf71dc9",
                            "lessThan": "526fac219e8b7d3369b43026bd0a1df51b811cd4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afd66255b9a48f5851326ddae50e2203fbf71dc9",
                            "lessThan": "7a39c732a22ec4a369af9e19fbe3d666ec83eec4",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/kprobes.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.34",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.34",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.113",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.56",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.10",
                            "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": "2.6.34",
                                    "versionEndExcluding": "6.6.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.34",
                                    "versionEndExcluding": "6.12.113"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.34",
                                    "versionEndExcluding": "6.18.56"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.34",
                                    "versionEndExcluding": "7.2.10"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.34",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/3f968dcdf018861129f97910fa7bd680d939a9b0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/985a568171e7bdba6dcde3420d0e5bb515813457"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6745fa65f4115045431c0c15610e876855a04625"
                },
                {
                    "url": "https://git.kernel.org/stable/c/526fac219e8b7d3369b43026bd0a1df51b811cd4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7a39c732a22ec4a369af9e19fbe3d666ec83eec4"
                }
            ],
            "title": "kprobes: Skip disarmed probes when checking optkprobe overlap",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}