{
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    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2021-47397",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-05-21T14:58:30.815Z",
        "datePublished": "2024-05-21T15:03:53.431Z",
        "dateUpdated": "2024-09-11T17:33:42.263Z"
    },
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                "shortName": "Linux",
                "dateUpdated": "2024-05-29T05:07:14.492Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: break out if skb_header_pointer returns NULL in sctp_rcv_ootb\n\nWe should always check if skb_header_pointer's return is NULL before\nusing it, otherwise it may cause null-ptr-deref, as syzbot reported:\n\n  KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n  RIP: 0010:sctp_rcv_ootb net/sctp/input.c:705 [inline]\n  RIP: 0010:sctp_rcv+0x1d84/0x3220 net/sctp/input.c:196\n  Call Trace:\n  <IRQ>\n   sctp6_rcv+0x38/0x60 net/sctp/ipv6.c:1109\n   ip6_protocol_deliver_rcu+0x2e9/0x1ca0 net/ipv6/ip6_input.c:422\n   ip6_input_finish+0x62/0x170 net/ipv6/ip6_input.c:463\n   NF_HOOK include/linux/netfilter.h:307 [inline]\n   NF_HOOK include/linux/netfilter.h:301 [inline]\n   ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:472\n   dst_input include/net/dst.h:460 [inline]\n   ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline]\n   NF_HOOK include/linux/netfilter.h:307 [inline]\n   NF_HOOK include/linux/netfilter.h:301 [inline]\n   ipv6_rcv+0x28c/0x3c0 net/ipv6/ip6_input.c:297"
                }
            ],
            "affected": [
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                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/sctp/input.c"
                    ],
                    "versions": [
                        {
                            "version": "3acb50c18d8d",
                            "lessThan": "77bc7dcf0fcc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3acb50c18d8d",
                            "lessThan": "8c630a7b4f9d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3acb50c18d8d",
                            "lessThan": "ec018021cf44",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3acb50c18d8d",
                            "lessThan": "9c6591ae8e63",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3acb50c18d8d",
                            "lessThan": "8180611c238e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3acb50c18d8d",
                            "lessThan": "f7e745f8e944",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/sctp/input.c"
                    ],
                    "versions": [
                        {
                            "version": "4.8",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.8",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "4.14.249",
                            "lessThanOrEqual": "4.14.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "4.19.209",
                            "lessThanOrEqual": "4.19.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.4.151",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.10.71",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.14.10",
                            "lessThanOrEqual": "5.14.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.15",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/77bc7dcf0fcc1519341a91788d7a2914fcfddf6d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8c630a7b4f9dec63f08bd881ab77984a724a5124"
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                {
                    "url": "https://git.kernel.org/stable/c/f7e745f8e94492a8ac0b0a26e25f2b19d342918f"
                }
            ],
            "title": "sctp: break out if skb_header_pointer returns NULL in sctp_rcv_ootb",
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                            "content": {
                                "id": "CVE-2021-47397",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
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