CVE-2026-89843

CVE CVE-2026-89843EUVD EUVD-2026-80443Published 2026-09-16T10:31:17.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Zero-init bsg stack buffers to avoid info leak Several bsg handlers stage their request/reply in an uninitialized 256-byte on-stack buffer (uint8_t bsg[DMA_POOL_SIZE]) and fill it via sg_copy_to_buffer(), which only copies as many bytes as the user-supplied request payload. When the request is shorter than the structure, the remainder of the buffer is left holding stale stack data. qla2x00_read_fru_status() and qla2x00_read_i2c() then copy the full structure back to the reply payload with sg_copy_from_buffer(), leaking the uninitialized stack bytes to user space. The write/update paths do not copy the buffer back, but can feed uninitialized fields to the device. Zero the stack buffer at declaration in all five handlers, mirroring the heap kzalloc() approach, so short requests can no longer expose stale memory.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <7881faf862ee301ecfe3adc0725bd2fa0021cd95; patch: 5.10.270; patch: 0; 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <26bc6a2c235a70bfc9b6de412600208aca820e20; patch: 5.15.221; 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <947c6bfcf7f5ec924995bec43e3108b98c75b44e; 3.2; 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <708c0ec1e09c52fee24b74ce9398bf3f8d1c83fd; patch: 7.2.5; 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <b93d3bb3afe1b44489927de1eb4e66e8536a5935; patch: 6.6.157; 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <5ab32dff910291b5e6bf6223f8a4003536c1800a; patch: 6.18.51; patch: 6.1.188; 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <4fe5790674097897a1af1367d1e384f7e5a62fb7; 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <1c820d0900e4aacd5020b989159f6b4b2f7d0d6a; patch: 7.3-rc1; patch: 6.12.110

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

Does this concern one of your customers?

This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.

Try it for 28 days

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.