SB2026082886 - Out-of-bounds write in Linux kernel intel idpf driver

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds write (CVE-ID: CVE-2026-80693)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to cause a denial of service or corrupt kernel memory.

The vulnerability exists due to an out-of-bounds write in idpf_get_reg_intr_vecs() when processing a VIRTCHNL2_OP_ALLOC_VECTORS reply. A remote user can return a crafted reply whose per-chunk num_vectors sum exceeds num_allocated_vectors to cause a denial of service or corrupt kernel memory.

Exploitation requires control of the control plane, such as a PF or hypervisor device model, that provides the vector allocation reply.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/41bb8748124d0d8ee5d8e1eace9dfbc874bc9564
• https://git.kernel.org/stable/c/9f7007ee9858c99aa43101bc8352c672fee85644