{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-23404",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-01-13T15:37:46.012Z",
        "datePublished": "2026-04-01T08:36:35.032Z",
        "dateUpdated": "2026-05-11T22:06:15.286Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T22:06:15.286Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: replace recursive profile removal with iterative approach\n\nThe profile removal code uses recursion when removing nested profiles,\nwhich can lead to kernel stack exhaustion and system crashes.\n\nReproducer:\n  $ pf='a'; for ((i=0; i<1024; i++)); do\n      echo -e \"profile $pf { \\n }\" | apparmor_parser -K -a;\n      pf=\"$pf//x\";\n  done\n  $ echo -n a > /sys/kernel/security/apparmor/.remove\n\nReplace the recursive __aa_profile_list_release() approach with an\niterative approach in __remove_profile(). The function repeatedly\nfinds and removes leaf profiles until the entire subtree is removed,\nmaintaining the same removal semantic without recursion."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "security/apparmor/policy.c"
                    ],
                    "versions": [
                        {
                            "version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92",
                            "lessThan": "ea854f032190cc9f26dc4a0e727090c89e55e342",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92",
                            "lessThan": "4fdc847b107321dec22bf8ecd6019b7af76d7886",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92",
                            "lessThan": "b36a04284d0208be94e5e401409caa00e2bf1be1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92",
                            "lessThan": "33959a491e9fd557abfa5fce5ae4637d400915d3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92",
                            "lessThan": "999bd704b0b641527a5ed46f0d969deff8cfa68b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92",
                            "lessThan": "7eade846e013cbe8d2dc4a484463aa19e6515c7f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92",
                            "lessThan": "a6a941a1294ac5abe22053dc501d25aed96e48fe",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92",
                            "lessThan": "ab09264660f9de5d05d1ef4e225aa447c63a8747",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "security/apparmor/policy.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.36",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.36",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.253",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.203",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.169",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.130",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.77",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.18",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.8",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "2.6.36",
                                    "versionEndExcluding": "5.10.253"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.36",
                                    "versionEndExcluding": "5.15.203"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.36",
                                    "versionEndExcluding": "6.1.169"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.36",
                                    "versionEndExcluding": "6.6.130"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.36",
                                    "versionEndExcluding": "6.12.77"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.36",
                                    "versionEndExcluding": "6.18.18"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.36",
                                    "versionEndExcluding": "6.19.8"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.36",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/ea854f032190cc9f26dc4a0e727090c89e55e342"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4fdc847b107321dec22bf8ecd6019b7af76d7886"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b36a04284d0208be94e5e401409caa00e2bf1be1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/33959a491e9fd557abfa5fce5ae4637d400915d3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/999bd704b0b641527a5ed46f0d969deff8cfa68b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7eade846e013cbe8d2dc4a484463aa19e6515c7f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a6a941a1294ac5abe22053dc501d25aed96e48fe"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ab09264660f9de5d05d1ef4e225aa447c63a8747"
                }
            ],
            "title": "apparmor: replace recursive profile removal with iterative approach",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}