{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-93264",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-17T16:02:15.097Z",
        "datePublished": "2026-09-24T15:52:03.741Z",
        "dateUpdated": "2026-10-19T09:08:17.409Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:08:17.409Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/efa: Fix PBL chunk length computation\n\nOn register MR, when creating the PBL, if it's an indirect PBL we create\na chunk list to hold the PBL pages pointers. Each chunk is 4KB in size\nand can hold 510 addresses (EFA_PTRS_PER_CHUNK) and has a 12-byte\ncontrol buffer at the end of it holding the next chunk's pointer and its\nlength.\n\nIf the PBL number of pages is a multiple of EFA_PTRS_PER_CHUNK, the\ncalculated last chunk length is wrongly computed as 0, even though that\nchunk is fully populated with 510 real page pointers. This wrong length\nis used both to DMA map the chunk and is propagated to the device,\ncausing the device to see the chunk as empty and reject the memory\nregistration.\n\nFix the calculation so it will be performed only if the number of pages\nisn't a multiple of EFA_PTRS_PER_CHUNK, if it is, its already handled in\nthe above loop correctly.\nAlso prevent out-of-bounds reach in the chunks array in such scenario."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/infiniband/hw/efa/efa_verbs.c"
                    ],
                    "versions": [
                        {
                            "version": "40909f664d279765af430acc5db348a0b71c9b0a",
                            "lessThan": "665cd418b8561a099c3854443f8ad8ae751b72a0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "40909f664d279765af430acc5db348a0b71c9b0a",
                            "lessThan": "932e5684906a090644a9061fae2d254041c3b8f2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "40909f664d279765af430acc5db348a0b71c9b0a",
                            "lessThan": "489b28f2377afa70c18c45b06a6387f3d39bb123",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "40909f664d279765af430acc5db348a0b71c9b0a",
                            "lessThan": "aadf3f9b5edb7f0a77e9172b237d2e07c754829c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "40909f664d279765af430acc5db348a0b71c9b0a",
                            "lessThan": "3982714e15512b83115897806dacc94899683420",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "40909f664d279765af430acc5db348a0b71c9b0a",
                            "lessThan": "da7805f0211af19968584e621074f253ac07dba7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "40909f664d279765af430acc5db348a0b71c9b0a",
                            "lessThan": "1d4b5902773475fc97151379b7e5f09cad0fa57b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "40909f664d279765af430acc5db348a0b71c9b0a",
                            "lessThan": "229b42d7450c1cf96f45ec39ebb69211b06bc036",
                            "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/infiniband/hw/efa/efa_verbs.c"
                    ],
                    "versions": [
                        {
                            "version": "5.2",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.2",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.270",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.221",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.188",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.157",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.110",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.52",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.6",
                            "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": "5.2",
                                    "versionEndExcluding": "5.10.270"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionStartIncluding": "5.2",
                                    "versionEndExcluding": "7.2.6"
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.2",
                                    "versionEndExcluding": "7.3"
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                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/665cd418b8561a099c3854443f8ad8ae751b72a0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/932e5684906a090644a9061fae2d254041c3b8f2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/489b28f2377afa70c18c45b06a6387f3d39bb123"
                },
                {
                    "url": "https://git.kernel.org/stable/c/aadf3f9b5edb7f0a77e9172b237d2e07c754829c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3982714e15512b83115897806dacc94899683420"
                },
                {
                    "url": "https://git.kernel.org/stable/c/da7805f0211af19968584e621074f253ac07dba7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1d4b5902773475fc97151379b7e5f09cad0fa57b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/229b42d7450c1cf96f45ec39ebb69211b06bc036"
                }
            ],
            "title": "RDMA/efa: Fix PBL chunk length computation",
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