CVE-2026-89859

Summary

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().

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxec89146215d124c429bff84b498dccdc4919ffa7 < 5dfc77099c7d9fde9520a229794b0154d7ccccc1affected
LinuxLinuxec89146215d124c429bff84b498dccdc4919ffa7 < d6e2411516bb95e52cb74c9c56b60ad2548a2730affected
LinuxLinuxec89146215d124c429bff84b498dccdc4919ffa7 < 9fc03be982763a131913f84fe73b240ae45bca37affected
LinuxLinuxec89146215d124c429bff84b498dccdc4919ffa7 < a152edab3854f01dd2daf3eaf8f32cbabdb3834eaffected
LinuxLinux4.8affected
LinuxLinux0 < 4.8unaffected
LinuxLinux6.12.112 <= 6.12.*unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2.5 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References