{"apiVersion":"1.0","identifier":"CVE-2026-80693","description":"In the Linux kernel, the following vulnerability has been resolved: idpf: bound interrupt-vector register fill to the allocated array idpf_get_reg_intr_vecs() fills the caller-allocated reg_vals[] array from the VIRTCHNL2_OP_ALLOC_VECTORS reply in adapter->req_vec_chunks, bounding its inner loop only by the per-chunk num_vectors. The array is sized separately: idpf_intr_reg_init() allocates kzalloc_objs(struct idpf_vec_regs, total_vecs) from caps.num_allocated_vectors and only checks the returned count after the fill. The sum of per-chunk num_vectors is never reconciled against total_vecs, so a reply with a small num_allocated_vectors but chunks summing higher writes past the end of reg_vals[]. Impact: a control plane (a PF or hypervisor device model) that returns a VIRTCHNL2_OP_ALLOC_VECTORS reply whose per-chunk num_vectors sum exceeds num_allocated_vectors writes struct idpf_vec_regs entries past the end of the reg_vals kmalloc allocation (KASAN slab-out-of-bounds write). Bound the fill loop to the array capacity passed in by the callers, mirroring the sibling idpf_vport_get_q_reg(). The existing num_regs < num_vecs check then rejects an undersized reply without the out-of-bounds write happening first.","publishedAt":"2026-08-28T08:16:54","lastModifiedAt":"2026-08-28T08:16:54","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80693","cvssScore":null,"cvssVector":"Pending","epssProbability":0.00155,"riskScore":0,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-80693","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-80693","en":"https://www.redsauce.net/en/cves/CVE-2026-80693","fr":"https://www.redsauce.net/fr/cves/CVE-2026-80693","pt":"https://www.redsauce.net/pt/cves/CVE-2026-80693","de":"https://www.redsauce.net/de/cves/CVE-2026-80693","sk":"https://www.redsauce.net/sk/cves/CVE-2026-80693","el":"https://www.redsauce.net/el/cves/CVE-2026-80693"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-80693"}}