What’s Vulnerable › Vulnerabilities

CVE-2026-89859: scsi: qla2xxx: Zero dport diagnostics buffer to avoid info leak

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-16 · updated 2026-10-30

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().

Affected products

• Linux: 4.8 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2ecc30066c2284d2ed11bbd576ec97156b384054
• https://git.kernel.org/stable/c/504b177ad58c45be7e1cfa81f9b42f7f040737c5
• 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/c3e4c716909a053391b06a9a816c8588b652e3d2
• https://git.kernel.org/stable/c/d6e2411516bb95e52cb74c9c56b60ad2548a2730
• https://git.kernel.org/stable/c/eeef4fa993b3f962de9b45999f12ff25a5c79ce7

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