{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-54243",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-30T12:06:44.510Z",
        "datePublished": "2025-12-30T12:11:31.180Z",
        "dateUpdated": "2026-05-23T15:34:37.345Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-23T15:34:37.345Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ebtables: fix table blob use-after-free\n\nWe are not allowed to return an error at this point.\nLooking at the code it looks like ret is always 0 at this\npoint, but its not.\n\nt = find_table_lock(net, repl->name, &ret, &ebt_mutex);\n\n... this can return a valid table, with ret != 0.\n\nThis bug causes update of table->private with the new\nblob, but then frees the blob right away in the caller.\n\nSyzbot report:\n\nBUG: KASAN: vmalloc-out-of-bounds in __ebt_unregister_table+0xc00/0xcd0 net/bridge/netfilter/ebtables.c:1168\nRead of size 4 at addr ffffc90005425000 by task kworker/u4:4/74\nWorkqueue: netns cleanup_net\nCall Trace:\n kasan_report+0xbf/0x1f0 mm/kasan/report.c:517\n __ebt_unregister_table+0xc00/0xcd0 net/bridge/netfilter/ebtables.c:1168\n ebt_unregister_table+0x35/0x40 net/bridge/netfilter/ebtables.c:1372\n ops_exit_list+0xb0/0x170 net/core/net_namespace.c:169\n cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:613\n...\n\nip(6)tables appears to be ok (ret should be 0 at this point) but make\nthis more obvious."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/bridge/netfilter/ebtables.c",
                        "net/ipv4/netfilter/ip_tables.c",
                        "net/ipv6/netfilter/ip6_tables.c"
                    ],
                    "versions": [
                        {
                            "version": "c58dd2dd443c26d856a168db108a0cd11c285bf3",
                            "lessThan": "9060abce3305ab2354c892c09d5689df51486df5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c58dd2dd443c26d856a168db108a0cd11c285bf3",
                            "lessThan": "dbb3cbbf03b3c52cb390fabec357f1e4638004f5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c58dd2dd443c26d856a168db108a0cd11c285bf3",
                            "lessThan": "3dd6ac973351308d4117eda32298a9f1d68764fd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c58dd2dd443c26d856a168db108a0cd11c285bf3",
                            "lessThan": "cda0e0243bd3c04008fcd37a46b0269fb3c49249",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c58dd2dd443c26d856a168db108a0cd11c285bf3",
                            "lessThan": "e58a171d35e32e6e8c37cfe0e8a94406732a331f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a3bc0f8ea439762aa62d40a295157410498cbea7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8ed40c122919cd79bc3c059e5864e5e7d9d455f0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c5e4ef499cfc78de45a4f01b8c557b5964d77c53",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f34728610b2a8c7b9864f9404f2884c17f6fca5c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8b5740915a9faa8b1fa9166193a33e2a9ae30ec6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3.2.60",
                            "lessThan": "3.3",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "3.4.91",
                            "lessThan": "3.5",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "3.10.41",
                            "lessThan": "3.11",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "3.12.21",
                            "lessThan": "3.13",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "3.14.5",
                            "lessThan": "3.15",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/bridge/netfilter/ebtables.c",
                        "net/ipv4/netfilter/ip_tables.c",
                        "net/ipv6/netfilter/ip6_tables.c"
                    ],
                    "versions": [
                        {
                            "version": "3.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.173",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.100",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.18",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2.5",
                            "lessThanOrEqual": "6.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.3",
                            "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": "3.15",
                                    "versionEndExcluding": "5.10.173"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.15",
                                    "versionEndExcluding": "5.15.100"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.15",
                                    "versionEndExcluding": "6.1.18"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.15",
                                    "versionEndExcluding": "6.2.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.15",
                                    "versionEndExcluding": "6.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.2.60"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.4.91"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.10.41"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.12.21"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.14.5"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/9060abce3305ab2354c892c09d5689df51486df5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/dbb3cbbf03b3c52cb390fabec357f1e4638004f5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3dd6ac973351308d4117eda32298a9f1d68764fd"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cda0e0243bd3c04008fcd37a46b0269fb3c49249"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e58a171d35e32e6e8c37cfe0e8a94406732a331f"
                }
            ],
            "title": "netfilter: ebtables: fix table blob use-after-free",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}