{"affected":[{"conditional":false,"product":"linux_kernel","source":"NVD","vendor":"linux","versions":[{"greaterThanOrEqual":"6.12","lessThan":"6.12.92","status":"affected","version":"*","versionType":"custom"}]},{"conditional":false,"product":"linux_kernel","source":"NVD","vendor":"linux","versions":[{"greaterThanOrEqual":"6.13","lessThan":"6.18.34","status":"affected","version":"*","versionType":"custom"}]},{"conditional":false,"product":"linux_kernel","source":"NVD","vendor":"linux","versions":[{"greaterThanOrEqual":"6.19","lessThan":"7.0.11","status":"affected","version":"*","versionType":"custom"}]},{"conditional":false,"product":"linux_kernel","source":"NVD","vendor":"linux","versions":[{"status":"affected","version":"7.1","versionType":"custom"}]}],"cpeConfigurations":[{"negate":false,"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.92","versionStartIncluding":"6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.34","versionStartIncluding":"6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.11","versionStartIncluding":"6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*","vulnerable":true}],"negate":false,"operator":"OR"}],"operator":"OR"}],"cveId":"CVE-2026-64232","cwes":["CWE-667"],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nblock: recompute nr_integrity_segments in blk_insert_cloned_request\n\nblk_insert_cloned_request() already recomputes nr_phys_segments\nagainst the bottom queue, because \"the queue settings related to\nsegment counting may differ from the original queue.\" The exact same\nreasoning applies to integrity segments: a stacked driver's underlying\nqueue can have tighter virt_boundary_mask, seg_boundary_mask, or\nmax_segment_size than the top queue, in which case\nblk_rq_count_integrity_sg() against the bottom queue produces a\ndifferent count than the cached rq->nr_integrity_segments inherited\nfrom the source request by blk_rq_prep_clone().\n\nWhen the cached count is lower than the bottom queue's actual count,\nblk_rq_map_integrity_sg() trips\n\n\tBUG_ON(segments > rq->nr_integrity_segments);\n\non dispatch. The same families of stacked setups that motivated the\nexisting nr_phys_segments recompute -- dm-multipath fanning out to\nnvme-rdma in particular -- can produce this.\n\nMirror the nr_phys_segments handling: when the request carries\nintegrity, recompute nr_integrity_segments against the bottom queue\nand reject the request if it exceeds the bottom queue's\nmax_integrity_segments. blk_rq_count_integrity_sg() and\nqueue_max_integrity_segments() are both already available via\n<linux/blk-integrity.h>, which blk-mq.c includes.\n\nThis closes a latent gap in the stacking contract and brings the\nintegrity-segment accounting in line with the existing\nphys-segment accounting.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":9.8,"severity":"critical","source":"NVD: 416baaa9-dc9f-4396-8d5f-8c081fb06d67","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1794168600187,"publishedAt":1784909812367,"references":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/0943f81e1b3176f27dbaf6db268fc69d8a94f0ba"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/2c6e6a18a37b905cb584eb0dda3ae482162a81ca"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/42929c98d044f126508baf54a65b0f87f932fa75"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/53a01bcc0242590eda4c452a5bd996f62457113b"}],"remediation":[{"kind":"fix","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://git.kernel.org/stable/c/0943f81e1b3176f27dbaf6db268fc69d8a94f0ba"},{"kind":"fix","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://git.kernel.org/stable/c/2c6e6a18a37b905cb584eb0dda3ae482162a81ca"},{"kind":"fix","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://git.kernel.org/stable/c/42929c98d044f126508baf54a65b0f87f932fa75"},{"kind":"fix","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://git.kernel.org/stable/c/53a01bcc0242590eda4c452a5bd996f62457113b"}],"revision":"a93b8b0c888d9f101e51e20d74ef05cd8d7f24d526023f162708a012ef904374","sources":[{"modifiedAt":1794168600187,"name":"NVD","retrievedAt":1794183359332,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64232"}],"ssvc":{"assessedAt":1792165064821,"automatable":"yes","exploitation":"none","source":"NVD SSVC: 134c704f-9b21-4f2e-91b3-4a467353bcc0","technicalImpact":"total"},"status":"published","title":"CVE-2026-64232","updatedAt":1794183359332}