{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2021-47077",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-02-29T22:33:44.297Z",
        "datePublished": "2024-03-01T21:15:14.030Z",
        "dateUpdated": "2026-05-11T13:47:38.142Z"
    },
    "containers": {
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                "shortName": "Linux",
                "dateUpdated": "2026-05-11T13:47:38.142Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qedf: Add pointer checks in qedf_update_link_speed()\n\nThe following trace was observed:\n\n [   14.042059] Call Trace:\n [   14.042061]  <IRQ>\n [   14.042068]  qedf_link_update+0x144/0x1f0 [qedf]\n [   14.042117]  qed_link_update+0x5c/0x80 [qed]\n [   14.042135]  qed_mcp_handle_link_change+0x2d2/0x410 [qed]\n [   14.042155]  ? qed_set_ptt+0x70/0x80 [qed]\n [   14.042170]  ? qed_set_ptt+0x70/0x80 [qed]\n [   14.042186]  ? qed_rd+0x13/0x40 [qed]\n [   14.042205]  qed_mcp_handle_events+0x437/0x690 [qed]\n [   14.042221]  ? qed_set_ptt+0x70/0x80 [qed]\n [   14.042239]  qed_int_sp_dpc+0x3a6/0x3e0 [qed]\n [   14.042245]  tasklet_action_common.isra.14+0x5a/0x100\n [   14.042250]  __do_softirq+0xe4/0x2f8\n [   14.042253]  irq_exit+0xf7/0x100\n [   14.042255]  do_IRQ+0x7f/0xd0\n [   14.042257]  common_interrupt+0xf/0xf\n [   14.042259]  </IRQ>\n\nAPI qedf_link_update() is getting called from QED but by that time\nshost_data is not initialised. This results in a NULL pointer dereference\nwhen we try to dereference shost_data while updating supported_speeds.\n\nAdd a NULL pointer check before dereferencing shost_data."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/scsi/qedf/qedf_main.c"
                    ],
                    "versions": [
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                            "version": "61d8658b4a435eac729966cc94cdda077a8df5cd",
                            "lessThan": "a6362a737572f66051deb7637f3f77ddf7a4402f",
                            "status": "affected",
                            "versionType": "git"
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                        {
                            "version": "61d8658b4a435eac729966cc94cdda077a8df5cd",
                            "lessThan": "11014efcec378bb0050a6cf08eaf375e3693400a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "61d8658b4a435eac729966cc94cdda077a8df5cd",
                            "lessThan": "73578af92a0fae6609b955fcc9113e50e413c80f",
                            "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/scsi/qedf/qedf_main.c"
                    ],
                    "versions": [
                        {
                            "version": "4.11",
                            "status": "affected"
                        },
                        {
                            "version": "0",
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                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.40",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.12.7",
                            "lessThanOrEqual": "5.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.13",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
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                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionEndExcluding": "5.10.40"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/a6362a737572f66051deb7637f3f77ddf7a4402f"
                },
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                    "url": "https://git.kernel.org/stable/c/11014efcec378bb0050a6cf08eaf375e3693400a"
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                {
                    "url": "https://git.kernel.org/stable/c/73578af92a0fae6609b955fcc9113e50e413c80f"
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            "title": "scsi: qedf: Add pointer checks in qedf_update_link_speed()",
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                                        "Exploitation": "none"
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