CVE-2026-89859

Published: September 18, 2026Last modified: October 8, 2026

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Zero dport diagnostics buffer to avoid info leak qla2x00_do_dport_diagnostics() allocates the qla_dport_diag response buffer with kmalloc_obj() (non-zeroing) and, on success, copies the full sizeof(*dd) back to user space via sg_copy_from_buffer(). The inbound sg_copy_to_buffer() only fills as many bytes as the user request payload provides, and qla26xx_dport_diagnostics() zeroes only dd->buf. The options and unused[] fields are therefore copied out uninitialized, leaking kernel heap contents to user space. Allocate with kzalloc_obj(), matching qla2x00_do_dport_diagnostics_v2().

Status

References

• https://git.kernel.org/stable/c/2ecc30066c2284d2ed11bbd576ec97156b384054
• https://git.kernel.org/stable/c/5dfc77099c7d9fde9520a229794b0154d7ccccc1
• https://git.kernel.org/stable/c/9fc03be982763a131913f84fe73b240ae45bca37
• https://git.kernel.org/stable/c/a152edab3854f01dd2daf3eaf8f32cbabdb3834e
• https://git.kernel.org/stable/c/d6e2411516bb95e52cb74c9c56b60ad2548a2730