CVE-2026-64232 Affecting kernel-modules-extra-matched package, versions *
Threat Intelligence
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Test your applications- Snyk IDSNYK-CENTOS10-KERNELMODULESEXTRAMATCHED-18375510
- published29 Jul 2026
- disclosed24 Jul 2026
Introduced: 24 Jul 2026
NewCVE-2026-64232 (opens in a new tab)How to fix?
There is no fixed version for Centos:10 kernel-modules-extra-matched.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-modules-extra-matched package and not the kernel-modules-extra-matched package as distributed by Centos.
See How to fix? for Centos:10 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
block: recompute nr_integrity_segments in blk_insert_cloned_request
blk_insert_cloned_request() already recomputes nr_phys_segments against the bottom queue, because "the queue settings related to segment counting may differ from the original queue." The exact same reasoning applies to integrity segments: a stacked driver's underlying queue can have tighter virt_boundary_mask, seg_boundary_mask, or max_segment_size than the top queue, in which case blk_rq_count_integrity_sg() against the bottom queue produces a different count than the cached rq->nr_integrity_segments inherited from the source request by blk_rq_prep_clone().
When the cached count is lower than the bottom queue's actual count, blk_rq_map_integrity_sg() trips
BUG_ON(segments > rq->nr_integrity_segments);
on dispatch. The same families of stacked setups that motivated the existing nr_phys_segments recompute -- dm-multipath fanning out to nvme-rdma in particular -- can produce this.
Mirror the nr_phys_segments handling: when the request carries integrity, recompute nr_integrity_segments against the bottom queue and reject the request if it exceeds the bottom queue's max_integrity_segments. blk_rq_count_integrity_sg() and queue_max_integrity_segments() are both already available via <linux/blk-integrity.h>, which blk-mq.c includes.
This closes a latent gap in the stacking contract and brings the integrity-segment accounting in line with the existing phys-segment accounting.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2506791
- https://access.redhat.com/security/cve/CVE-2026-64232
- https://git.kernel.org/stable/c/0943f81e1b3176f27dbaf6db268fc69d8a94f0ba
- https://git.kernel.org/stable/c/2c6e6a18a37b905cb584eb0dda3ae482162a81ca
- https://git.kernel.org/stable/c/42929c98d044f126508baf54a65b0f87f932fa75
- https://git.kernel.org/stable/c/53a01bcc0242590eda4c452a5bd996f62457113b