{"api_version":"1","generated_at":"2026-05-30T17:58:46+00:00","cve":"CVE-2026-46181","urls":{"html":"https://cve.report/CVE-2026-46181","api":"https://cve.report/api/cve/CVE-2026-46181.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-46181","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-46181"},"summary":{"title":"RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()\n\nSashiko points out the radix_tree itself is RCU safe, but nothing ever\nfrees the mlx4_srq struct with RCU, and it isn't even accessed within the\nRCU critical section. It also will crash if an event is delivered before\nthe srq object is finished initializing.\n\nUse the spinlock since it isn't easy to make RCU work, use\nrefcount_inc_not_zero() to protect against partially initialized objects,\nand order the refcount_set() to be after the srq is fully initialized.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-28 10:16:33","updated_at":"2026-05-30 11:17:25"},"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/8b7833f3bce35cb0d01c1503781523c099c675f0","name":"https://git.kernel.org/stable/c/8b7833f3bce35cb0d01c1503781523c099c675f0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c9341307ea16b9395c2e4c9c94d8499d91fe31d0","name":"https://git.kernel.org/stable/c/c9341307ea16b9395c2e4c9c94d8499d91fe31d0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1e2a44875b6afb4add1115f7f3351dcbeb6f273d","name":"https://git.kernel.org/stable/c/1e2a44875b6afb4add1115f7f3351dcbeb6f273d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46181","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46181","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 30353bfc43a1602c020f31d95cf27182ffd23824 1e2a44875b6afb4add1115f7f3351dcbeb6f273d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 30353bfc43a1602c020f31d95cf27182ffd23824 8b7833f3bce35cb0d01c1503781523c099c675f0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 30353bfc43a1602c020f31d95cf27182ffd23824 c9341307ea16b9395c2e4c9c94d8499d91fe31d0 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 6.18.30 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.7 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1-rc3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"46181","cve":"CVE-2026-46181","epss":"0.000170000","percentile":"0.043360000","score_date":"2026-05-29","updated_at":"2026-05-30 00:13:24"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/ethernet/mellanox/mlx4/srq.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"1e2a44875b6afb4add1115f7f3351dcbeb6f273d","status":"affected","version":"30353bfc43a1602c020f31d95cf27182ffd23824","versionType":"git"},{"lessThan":"8b7833f3bce35cb0d01c1503781523c099c675f0","status":"affected","version":"30353bfc43a1602c020f31d95cf27182ffd23824","versionType":"git"},{"lessThan":"c9341307ea16b9395c2e4c9c94d8499d91fe31d0","status":"affected","version":"30353bfc43a1602c020f31d95cf27182ffd23824","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ethernet/mellanox/mlx4/srq.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":"6.18.*","status":"unaffected","version":"6.18.30","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1-rc3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.30","versionStartIncluding":"4.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.7","versionStartIncluding":"4.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1-rc3","versionStartIncluding":"4.9","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()\n\nSashiko points out the radix_tree itself is RCU safe, but nothing ever\nfrees the mlx4_srq struct with RCU, and it isn't even accessed within the\nRCU critical section. It also will crash if an event is delivered before\nthe srq object is finished initializing.\n\nUse the spinlock since it isn't easy to make RCU work, use\nrefcount_inc_not_zero() to protect against partially initialized objects,\nand order the refcount_set() to be after the srq is fully initialized."}],"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"}}],"providerMetadata":{"dateUpdated":"2026-05-30T10:48:49.289Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/1e2a44875b6afb4add1115f7f3351dcbeb6f273d"},{"url":"https://git.kernel.org/stable/c/8b7833f3bce35cb0d01c1503781523c099c675f0"},{"url":"https://git.kernel.org/stable/c/c9341307ea16b9395c2e4c9c94d8499d91fe31d0"}],"title":"RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-46181","datePublished":"2026-05-28T09:36:34.706Z","dateReserved":"2026-05-13T15:03:33.103Z","dateUpdated":"2026-05-30T10:48:49.289Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-28 10:16:33","lastModifiedDate":"2026-05-30 11:17:25","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":"46181","Ordinal":"1","Title":"RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()","CVE":"CVE-2026-46181","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"46181","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()\n\nSashiko points out the radix_tree itself is RCU safe, but nothing ever\nfrees the mlx4_srq struct with RCU, and it isn't even accessed within the\nRCU critical section. It also will crash if an event is delivered before\nthe srq object is finished initializing.\n\nUse the spinlock since it isn't easy to make RCU work, use\nrefcount_inc_not_zero() to protect against partially initialized objects,\nand order the refcount_set() to be after the srq is fully initialized.","Type":"Description","Title":"RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()"}]}}}