{"api_version":"1","generated_at":"2026-08-24T13:04:42+00:00","cve":"CVE-2026-74297","urls":{"html":"https://cve.report/CVE-2026-74297","api":"https://cve.report/api/cve/CVE-2026-74297.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74297","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74297"},"summary":{"title":"RDMA/mlx5: Fix undefined shift of user RQ WQE size","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Fix undefined shift of user RQ WQE size\n\nset_rq_size() computes the RQ WQE size as \"1 << rq_wqe_shift\" based on\nthe user-provided rq_wqe_shift, which is only checked to be greater than\n32, so shifts of 32 are still accepted. A shift of 31 also overflows a\nsigned integer, leading to undefined behavior.\n\nUse check_shl_overflow() to compute the RQ WQE size and reject any\ninvalid values.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:29","updated_at":"2026-08-17 06:19:23"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","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":"CNA","type":"DECLARED","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":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/b732db02a2b04cde393638df19de6251ce62a74e","name":"https://git.kernel.org/stable/c/b732db02a2b04cde393638df19de6251ce62a74e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4b87a2497276a72fd63028e7419abf0fb7ed837b","name":"https://git.kernel.org/stable/c/4b87a2497276a72fd63028e7419abf0fb7ed837b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c1dbf52d24a8cb1aa56780ba51b72e7d495f258c","name":"https://git.kernel.org/stable/c/c1dbf52d24a8cb1aa56780ba51b72e7d495f258c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d881d60223aac8fdc12b227d89c76e131e92a9cd","name":"https://git.kernel.org/stable/c/d881d60223aac8fdc12b227d89c76e131e92a9cd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/42f3d2c8c18b92ea33e506a38b64f1a8986c2823","name":"https://git.kernel.org/stable/c/42f3d2c8c18b92ea33e506a38b64f1a8986c2823","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b746f949c2ac2b041102836095d6d4a2ef21fa75","name":"https://git.kernel.org/stable/c/b746f949c2ac2b041102836095d6d4a2ef21fa75","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6fc874fdfb366bfb11c62e6af9a831c8be59ddda","name":"https://git.kernel.org/stable/c/6fc874fdfb366bfb11c62e6af9a831c8be59ddda","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9fff54929cc00849d738faa99f06c32399aeb026","name":"https://git.kernel.org/stable/c/9fff54929cc00849d738faa99f06c32399aeb026","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74297","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74297","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c 9fff54929cc00849d738faa99f06c32399aeb026 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c b746f949c2ac2b041102836095d6d4a2ef21fa75 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c c1dbf52d24a8cb1aa56780ba51b72e7d495f258c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c 6fc874fdfb366bfb11c62e6af9a831c8be59ddda git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c 42f3d2c8c18b92ea33e506a38b64f1a8986c2823 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c 4b87a2497276a72fd63028e7419abf0fb7ed837b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c b732db02a2b04cde393638df19de6251ce62a74e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c d881d60223aac8fdc12b227d89c76e131e92a9cd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.11","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.261 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.212 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"74297","cve":"CVE-2026-74297","epss":"0.001290000","percentile":"0.029820000","score_date":"2026-08-17","updated_at":"2026-08-18 00:11:46"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/infiniband/hw/mlx5/qp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"9fff54929cc00849d738faa99f06c32399aeb026","status":"affected","version":"e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c","versionType":"git"},{"lessThan":"b746f949c2ac2b041102836095d6d4a2ef21fa75","status":"affected","version":"e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c","versionType":"git"},{"lessThan":"c1dbf52d24a8cb1aa56780ba51b72e7d495f258c","status":"affected","version":"e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c","versionType":"git"},{"lessThan":"6fc874fdfb366bfb11c62e6af9a831c8be59ddda","status":"affected","version":"e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c","versionType":"git"},{"lessThan":"42f3d2c8c18b92ea33e506a38b64f1a8986c2823","status":"affected","version":"e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c","versionType":"git"},{"lessThan":"4b87a2497276a72fd63028e7419abf0fb7ed837b","status":"affected","version":"e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c","versionType":"git"},{"lessThan":"b732db02a2b04cde393638df19de6251ce62a74e","status":"affected","version":"e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c","versionType":"git"},{"lessThan":"d881d60223aac8fdc12b227d89c76e131e92a9cd","status":"affected","version":"e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/infiniband/hw/mlx5/qp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.11"},{"lessThan":"3.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.261","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.261","versionStartIncluding":"3.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"3.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"3.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"3.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"3.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"3.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"3.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"3.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Fix undefined shift of user RQ WQE size\n\nset_rq_size() computes the RQ WQE size as \"1 << rq_wqe_shift\" based on\nthe user-provided rq_wqe_shift, which is only checked to be greater than\n32, so shifts of 32 are still accepted. A shift of 31 also overflows a\nsigned integer, leading to undefined behavior.\n\nUse check_shl_overflow() to compute the RQ WQE size and reject any\ninvalid values."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - Exploitation requires a local ioctl on /dev/infiniband/uverbs to IB_USER_VERBS_CMD_CREATE_QP; malicious rq_wqe_shift is supplied in mlx5_ib_create_qp userspace data, not from remote RDMA/InfiniBand wire traffic.\nAC:L - An attacker with uverbs access can deterministically pass rq_wqe_shift values 31 or 32 in create_qp driver udata; no races or victim state beyond opening the device and issuing the ioctl are required.\nPR:L - Only local access to the RDMA character device is required (typically rdma group membership on HPC/AI cloud GPU nodes), not init-namespace root; this matches basic local user capability rather than administrator privilege.\nUI:N - No victim interaction is needed; the attacker triggers the flaw entirely through their own create_qp ioctl with crafted mlx5_ib_create_qp fields.\nS:U - Impact stays within the kernel and RDMA context of the attacking process/tenant; it is not a VM-hypervisor or cross-security-authority boundary escape despite using a network-capable NIC.\nC:H - Integer overflow/undefined shift can undersize ib_umem registration while hardware is programmed with a huge RQ stride, enabling out-of-bounds DMA reads and kernel/user memory disclosure beyond the registered queue buffer.\nI:H - Corrupted max_gs (e.g. negative from shift 31) bypasses scatter/gather limits in post_recv, and undersized buffers with oversized hardware stride allow out-of-bounds writes and exploitable memory corruption.\nA:H - Undefined signed shifts and inconsistent queue sizing can cause kernel oops/panic during QP setup or later queue operations, and misprogrammed hardware can hang or crash the host under active RDMA use."}]}],"providerMetadata":{"dateUpdated":"2026-08-17T05:45:36.087Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/9fff54929cc00849d738faa99f06c32399aeb026"},{"url":"https://git.kernel.org/stable/c/b746f949c2ac2b041102836095d6d4a2ef21fa75"},{"url":"https://git.kernel.org/stable/c/c1dbf52d24a8cb1aa56780ba51b72e7d495f258c"},{"url":"https://git.kernel.org/stable/c/6fc874fdfb366bfb11c62e6af9a831c8be59ddda"},{"url":"https://git.kernel.org/stable/c/42f3d2c8c18b92ea33e506a38b64f1a8986c2823"},{"url":"https://git.kernel.org/stable/c/4b87a2497276a72fd63028e7419abf0fb7ed837b"},{"url":"https://git.kernel.org/stable/c/b732db02a2b04cde393638df19de6251ce62a74e"},{"url":"https://git.kernel.org/stable/c/d881d60223aac8fdc12b227d89c76e131e92a9cd"}],"title":"RDMA/mlx5: Fix undefined shift of user RQ WQE size","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74297","datePublished":"2026-08-15T05:58:01.414Z","dateReserved":"2026-08-15T05:44:03.882Z","dateUpdated":"2026-08-17T05:45:36.087Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:29","lastModifiedDate":"2026-08-17 06:19:23","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","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}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74297","Ordinal":"1","Title":"RDMA/mlx5: Fix undefined shift of user RQ WQE size","CVE":"CVE-2026-74297","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74297","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Fix undefined shift of user RQ WQE size\n\nset_rq_size() computes the RQ WQE size as \"1 << rq_wqe_shift\" based on\nthe user-provided rq_wqe_shift, which is only checked to be greater than\n32, so shifts of 32 are still accepted. A shift of 31 also overflows a\nsigned integer, leading to undefined behavior.\n\nUse check_shl_overflow() to compute the RQ WQE size and reject any\ninvalid values.","Type":"Description","Title":"RDMA/mlx5: Fix undefined shift of user RQ WQE size"}]}}}