{"api_version":"1","generated_at":"2026-08-25T20:47:34+00:00","cve":"CVE-2022-48744","urls":{"html":"https://cve.report/CVE-2022-48744","api":"https://cve.report/api/cve/CVE-2022-48744.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2022-48744","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2022-48744"},"summary":{"title":"net/mlx5e: Avoid field-overflowing memcpy()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Avoid field-overflowing memcpy()\n\nIn preparation for FORTIFY_SOURCE performing compile-time and run-time\nfield bounds checking for memcpy(), memmove(), and memset(), avoid\nintentionally writing across neighboring fields.\n\nUse flexible arrays instead of zero-element arrays (which look like they\nare always overflowing) and split the cross-field memcpy() into two halves\nthat can be appropriately bounds-checked by the compiler.\n\nWe were doing:\n\n\t#define ETH_HLEN  14\n\t#define VLAN_HLEN  4\n\t...\n\t#define MLX5E_XDP_MIN_INLINE (ETH_HLEN + VLAN_HLEN)\n\t...\n        struct mlx5e_tx_wqe      *wqe  = mlx5_wq_cyc_get_wqe(wq, pi);\n\t...\n        struct mlx5_wqe_eth_seg  *eseg = &wqe->eth;\n        struct mlx5_wqe_data_seg *dseg = wqe->data;\n\t...\n\tmemcpy(eseg->inline_hdr.start, xdptxd->data, MLX5E_XDP_MIN_INLINE);\n\ntarget is wqe->eth.inline_hdr.start (which the compiler sees as being\n2 bytes in size), but copying 18, intending to write across start\n(really vlan_tci, 2 bytes). The remaining 16 bytes get written into\nwqe->data[0], covering byte_count (4 bytes), lkey (4 bytes), and addr\n(8 bytes).\n\nstruct mlx5e_tx_wqe {\n        struct mlx5_wqe_ctrl_seg   ctrl;                 /*     0    16 */\n        struct mlx5_wqe_eth_seg    eth;                  /*    16    16 */\n        struct mlx5_wqe_data_seg   data[];               /*    32     0 */\n\n        /* size: 32, cachelines: 1, members: 3 */\n        /* last cacheline: 32 bytes */\n};\n\nstruct mlx5_wqe_eth_seg {\n        u8                         swp_outer_l4_offset;  /*     0     1 */\n        u8                         swp_outer_l3_offset;  /*     1     1 */\n        u8                         swp_inner_l4_offset;  /*     2     1 */\n        u8                         swp_inner_l3_offset;  /*     3     1 */\n        u8                         cs_flags;             /*     4     1 */\n        u8                         swp_flags;            /*     5     1 */\n        __be16                     mss;                  /*     6     2 */\n        __be32                     flow_table_metadata;  /*     8     4 */\n        union {\n                struct {\n                        __be16     sz;                   /*    12     2 */\n                        u8         start[2];             /*    14     2 */\n                } inline_hdr;                            /*    12     4 */\n                struct {\n                        __be16     type;                 /*    12     2 */\n                        __be16     vlan_tci;             /*    14     2 */\n                } insert;                                /*    12     4 */\n                __be32             trailer;              /*    12     4 */\n        };                                               /*    12     4 */\n\n        /* size: 16, cachelines: 1, members: 9 */\n        /* last cacheline: 16 bytes */\n};\n\nstruct mlx5_wqe_data_seg {\n        __be32                     byte_count;           /*     0     4 */\n        __be32                     lkey;                 /*     4     4 */\n        __be64                     addr;                 /*     8     8 */\n\n        /* size: 16, cachelines: 1, members: 3 */\n        /* last cacheline: 16 bytes */\n};\n\nSo, split the memcpy() so the compiler can reason about the buffer\nsizes.\n\n\"pahole\" shows no size nor member offset changes to struct mlx5e_tx_wqe\nnor struct mlx5e_umr_wqe. \"objdump -d\" shows no meaningful object\ncode changes (i.e. only source line number induced differences and\noptimizations).","state":"PUBLISHED","assigner":"Linux","published_at":"2024-06-20 12:15:12","updated_at":"2026-08-04 10:17:19"},"problem_types":["CWE-787"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/ad5185735f7dab342fdd0dd41044da4c9ccfef67","name":"https://git.kernel.org/stable/c/ad5185735f7dab342fdd0dd41044da4c9ccfef67","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8fbdf8c8b8ab82beab882175157650452c46493e","name":"https://git.kernel.org/stable/c/8fbdf8c8b8ab82beab882175157650452c46493e","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/49bcbe531f79fc35bb10020f7695f9f01e4f0ca8","name":"https://git.kernel.org/stable/c/49bcbe531f79fc35bb10020f7695f9f01e4f0ca8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2022-48744","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-48744","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b5503b994ed5ed8dbfe821317e7b5b38acb065c5 49bcbe531f79fc35bb10020f7695f9f01e4f0ca8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b5503b994ed5ed8dbfe821317e7b5b38acb065c5 8fbdf8c8b8ab82beab882175157650452c46493e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b5503b994ed5ed8dbfe821317e7b5b38acb065c5 ad5185735f7dab342fdd0dd41044da4c9ccfef67 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.9","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.9 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.248 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.16.6 5.16.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.17 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2022","cve_id":"48744","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"providerMetadata":{"dateUpdated":"2024-08-03T15:25:00.531Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"tags":["x_transferred"],"url":"https://git.kernel.org/stable/c/8fbdf8c8b8ab82beab882175157650452c46493e"},{"tags":["x_transferred"],"url":"https://git.kernel.org/stable/c/ad5185735f7dab342fdd0dd41044da4c9ccfef67"}],"title":"CVE Program 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Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/en.h","drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"49bcbe531f79fc35bb10020f7695f9f01e4f0ca8","status":"affected","version":"b5503b994ed5ed8dbfe821317e7b5b38acb065c5","versionType":"git"},{"lessThan":"8fbdf8c8b8ab82beab882175157650452c46493e","status":"affected","version":"b5503b994ed5ed8dbfe821317e7b5b38acb065c5","versionType":"git"},{"lessThan":"ad5185735f7dab342fdd0dd41044da4c9ccfef67","status":"affected","version":"b5503b994ed5ed8dbfe821317e7b5b38acb065c5","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/en.h","drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.9"},{"lessThan":"4.9","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.248","versionType":"semver"},{"lessThanOrEqual":"5.16.*","status":"unaffected","version":"5.16.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"5.17","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.248","versionStartIncluding":"4.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.16.6","versionStartIncluding":"4.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.17","versionStartIncluding":"4.9","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Avoid field-overflowing memcpy()\n\nIn preparation for FORTIFY_SOURCE performing compile-time and run-time\nfield bounds checking for memcpy(), memmove(), and memset(), avoid\nintentionally writing across neighboring fields.\n\nUse flexible arrays instead of zero-element arrays (which look like they\nare always overflowing) and split the cross-field memcpy() into two halves\nthat can be appropriately bounds-checked by the compiler.\n\nWe were doing:\n\n\t#define ETH_HLEN  14\n\t#define VLAN_HLEN  4\n\t...\n\t#define MLX5E_XDP_MIN_INLINE (ETH_HLEN + VLAN_HLEN)\n\t...\n        struct mlx5e_tx_wqe      *wqe  = mlx5_wq_cyc_get_wqe(wq, pi);\n\t...\n        struct mlx5_wqe_eth_seg  *eseg = &wqe->eth;\n        struct mlx5_wqe_data_seg *dseg = wqe->data;\n\t...\n\tmemcpy(eseg->inline_hdr.start, xdptxd->data, MLX5E_XDP_MIN_INLINE);\n\ntarget is wqe->eth.inline_hdr.start (which the compiler sees as being\n2 bytes in size), but copying 18, intending to write across start\n(really vlan_tci, 2 bytes). The remaining 16 bytes get written into\nwqe->data[0], covering byte_count (4 bytes), lkey (4 bytes), and addr\n(8 bytes).\n\nstruct mlx5e_tx_wqe {\n        struct mlx5_wqe_ctrl_seg   ctrl;                 /*     0    16 */\n        struct mlx5_wqe_eth_seg    eth;                  /*    16    16 */\n        struct mlx5_wqe_data_seg   data[];               /*    32     0 */\n\n        /* size: 32, cachelines: 1, members: 3 */\n        /* last cacheline: 32 bytes */\n};\n\nstruct mlx5_wqe_eth_seg {\n        u8                         swp_outer_l4_offset;  /*     0     1 */\n        u8                         swp_outer_l3_offset;  /*     1     1 */\n        u8                         swp_inner_l4_offset;  /*     2     1 */\n        u8                         swp_inner_l3_offset;  /*     3     1 */\n        u8                         cs_flags;             /*     4     1 */\n        u8                         swp_flags;            /*     5     1 */\n        __be16                     mss;                  /*     6     2 */\n        __be32                     flow_table_metadata;  /*     8     4 */\n        union {\n                struct {\n                        __be16     sz;                   /*    12     2 */\n                        u8         start[2];             /*    14     2 */\n                } inline_hdr;                            /*    12     4 */\n                struct {\n                        __be16     type;                 /*    12     2 */\n                        __be16     vlan_tci;             /*    14     2 */\n                } insert;                                /*    12     4 */\n                __be32             trailer;              /*    12     4 */\n        };                                               /*    12     4 */\n\n        /* size: 16, cachelines: 1, members: 9 */\n        /* last cacheline: 16 bytes */\n};\n\nstruct mlx5_wqe_data_seg {\n        __be32                     byte_count;           /*     0     4 */\n        __be32                     lkey;                 /*     4     4 */\n        __be64                     addr;                 /*     8     8 */\n\n        /* size: 16, cachelines: 1, members: 3 */\n        /* last cacheline: 16 bytes */\n};\n\nSo, split the memcpy() so the compiler can reason about the buffer\nsizes.\n\n\"pahole\" shows no size nor member offset changes to struct mlx5e_tx_wqe\nnor struct mlx5e_umr_wqe. \"objdump -d\" shows no meaningful object\ncode changes (i.e. only source line number induced differences and\noptimizations)."}],"metrics":[{"cvssV3_1":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-08-04T09:02:21.128Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/49bcbe531f79fc35bb10020f7695f9f01e4f0ca8"},{"url":"https://git.kernel.org/stable/c/8fbdf8c8b8ab82beab882175157650452c46493e"},{"url":"https://git.kernel.org/stable/c/ad5185735f7dab342fdd0dd41044da4c9ccfef67"}],"title":"net/mlx5e: Avoid field-overflowing memcpy()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2022-48744","datePublished":"2024-06-20T11:13:27.979Z","dateReserved":"2024-06-20T11:09:39.055Z","dateUpdated":"2026-08-04T09:02:21.128Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2024-06-20 12:15:12","lastModifiedDate":"2026-08-04 10:17:19","problem_types":["CWE-787"],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2024-09-10T17:10:38.103398Z","id":"CVE-2022-48744","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"5.10.248","matchCriteriaId":"1B8A9926-E937-4549-9F0F-45FFA5A1B223"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.16.6","matchCriteriaId":"B86008BD-9B22-48BD-BF3C-6B8C39E35604"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.17:rc1:*:*:*:*:*:*","matchCriteriaId":"7BD5F8D9-54FA-4CB0-B4F0-CB0471FDDB2D"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.17:rc2:*:*:*:*:*:*","matchCriteriaId":"E6E34B23-78B4-4516-9BD8-61B33F4AC49A"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2022","CveId":"48744","Ordinal":"1","Title":"net/mlx5e: Avoid field-overflowing memcpy()","CVE":"CVE-2022-48744","Year":"2022"},"notes":[{"CveYear":"2022","CveId":"48744","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Avoid field-overflowing memcpy()\n\nIn preparation for FORTIFY_SOURCE performing compile-time and run-time\nfield bounds checking for memcpy(), memmove(), and memset(), avoid\nintentionally writing across neighboring fields.\n\nUse flexible arrays instead of zero-element arrays (which look like they\nare always overflowing) and split the cross-field memcpy() into two halves\nthat can be appropriately bounds-checked by the compiler.\n\nWe were doing:\n\n\t#define ETH_HLEN  14\n\t#define VLAN_HLEN  4\n\t...\n\t#define MLX5E_XDP_MIN_INLINE (ETH_HLEN + VLAN_HLEN)\n\t...\n        struct mlx5e_tx_wqe      *wqe  = mlx5_wq_cyc_get_wqe(wq, pi);\n\t...\n        struct mlx5_wqe_eth_seg  *eseg = &wqe->eth;\n        struct mlx5_wqe_data_seg *dseg = wqe->data;\n\t...\n\tmemcpy(eseg->inline_hdr.start, xdptxd->data, MLX5E_XDP_MIN_INLINE);\n\ntarget is wqe->eth.inline_hdr.start (which the compiler sees as being\n2 bytes in size), but copying 18, intending to write across start\n(really vlan_tci, 2 bytes). The remaining 16 bytes get written into\nwqe->data[0], covering byte_count (4 bytes), lkey (4 bytes), and addr\n(8 bytes).\n\nstruct mlx5e_tx_wqe {\n        struct mlx5_wqe_ctrl_seg   ctrl;                 /*     0    16 */\n        struct mlx5_wqe_eth_seg    eth;                  /*    16    16 */\n        struct mlx5_wqe_data_seg   data[];               /*    32     0 */\n\n        /* size: 32, cachelines: 1, members: 3 */\n        /* last cacheline: 32 bytes */\n};\n\nstruct mlx5_wqe_eth_seg {\n        u8                         swp_outer_l4_offset;  /*     0     1 */\n        u8                         swp_outer_l3_offset;  /*     1     1 */\n        u8                         swp_inner_l4_offset;  /*     2     1 */\n        u8                         swp_inner_l3_offset;  /*     3     1 */\n        u8                         cs_flags;             /*     4     1 */\n        u8                         swp_flags;            /*     5     1 */\n        __be16                     mss;                  /*     6     2 */\n        __be32                     flow_table_metadata;  /*     8     4 */\n        union {\n                struct {\n                        __be16     sz;                   /*    12     2 */\n                        u8         start[2];             /*    14     2 */\n                } inline_hdr;                            /*    12     4 */\n                struct {\n                        __be16     type;                 /*    12     2 */\n                        __be16     vlan_tci;             /*    14     2 */\n                } insert;                                /*    12     4 */\n                __be32             trailer;              /*    12     4 */\n        };                                               /*    12     4 */\n\n        /* size: 16, cachelines: 1, members: 9 */\n        /* last cacheline: 16 bytes */\n};\n\nstruct mlx5_wqe_data_seg {\n        __be32                     byte_count;           /*     0     4 */\n        __be32                     lkey;                 /*     4     4 */\n        __be64                     addr;                 /*     8     8 */\n\n        /* size: 16, cachelines: 1, members: 3 */\n        /* last cacheline: 16 bytes */\n};\n\nSo, split the memcpy() so the compiler can reason about the buffer\nsizes.\n\n\"pahole\" shows no size nor member offset changes to struct mlx5e_tx_wqe\nnor struct mlx5e_umr_wqe. \"objdump -d\" shows no meaningful object\ncode changes (i.e. only source line number induced differences and\noptimizations).","Type":"Description","Title":"net/mlx5e: Avoid field-overflowing memcpy()"}]}}}