Linux CVE-2026-64293

We are tasked to synthesize a comprehensive analysis for CVE-2026-64293. Need to output JSON.

Given data:

• CVE ID: CVE-2026-64293
• Description: long description about iommufd veventq read bug with sizeof(hdr) vs sizeof(*hdr). On 32-bit, under-counts header size, leading to buffer overflow past user-supplied buffer.
• CVSS: 7.8, vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
• CWE: N/A (but we can infer CWE-131: Incorrect Calculation of Buffer Size? Or maybe CWE-682: Incorrect Calculation? Not given.)
• EPSS: 0.21% (percentile 11%) — low exploitation probability.
• Patch: Available from vendor.
• Reported by: Linux (likely Linux kernel)
• CPE: cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:* (all versions)
• Tags: Linux, Information Disclosure (though the vulnerability is actually a buffer overflow, but tags say Information Disclosure; perhaps they are generic tags, not precise)
• ENISA EUVD ID: EUVD-2026-49005
• Affected versions (EUVD): weird entries: "Linux patch: 7.1.4", "Linux 6.15", "Linux patch: 0", "Linux patch: 7.2-rc1", "Linux e36ba5ab808ef6237c3148d469c8238674230e2b <be93d186ae88a92e7aa77e122d4e661fa57b1e39", "Linux e36ba5ab808ef6237c3148d469c8238674230e2b <0cdbb97a4dbd69abdd2ab998b4fbc7803d4b0b72", "Linux e36ba5ab808ef6237c3148d469c8238674230e2b <04a177f91160ee18da98f5689482cf0f589ec869", "Linux patch: 6.18.39"
• Looks like commit ranges and patch references. Need to interpret.
• References: three kernel git commits, NVD link, vuldb link.

Analysis:

Product name: Linux kernel (specifically iommufd subsystem). So product_name: "Linux Kernel".

Summary: Must not copy description, write original synthesis. Buffer overflow in Linux kernel's iommufd subsystem, specifically in veventq read path due to sizeof(hdr) using pointer size instead of structure size, leading to potential memory corruption on 32-bit systems. Allowing local attackers with low privileges to gain elevated privileges or cause system compromise. CVSS 7.8 indicates local vector, low complexity, high im