CVE-2026-89843scsi: qla2xxx: Zero-init bsg stack buffers to avoid info leak
Updated under an hour ago ()
Does this affect you?
It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 builds before 1c820d0900e4aacd5020b989159f6b4b2f7d0d6a; 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 builds before 26bc6a2c235a70bfc9b6de412600208aca820e20; 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 builds before 5ab32dff910291b5e6bf6223f8a4003536c1800a; from 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 before 947c6bfcf7f5ec924995bec43e3108b98c75b44e; from 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 before 708c0ec1e09c52fee24b74ce9398bf3f8d1c83fd; 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 builds before 4fe5790674097897a1af1367d1e384f7e5a62fb7; from 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 before 7881faf862ee301ecfe3adc0725bd2fa0021cd95; from 697a4bc69159c3396035b0506ffa55c4b2d0b1f4 before b93d3bb3afe1b44489927de1eb4e66e8536a5935 | CNA record |
References
- https://git.kernel.org/stable/c/1c820d0900e4aacd5020b989159f6b4b2f7d0d6a
- https://git.kernel.org/stable/c/26bc6a2c235a70bfc9b6de412600208aca820e20
- https://git.kernel.org/stable/c/5ab32dff910291b5e6bf6223f8a4003536c1800a
- https://git.kernel.org/stable/c/947c6bfcf7f5ec924995bec43e3108b98c75b44e
- https://git.kernel.org/stable/c/708c0ec1e09c52fee24b74ce9398bf3f8d1c83fd
- https://git.kernel.org/stable/c/4fe5790674097897a1af1367d1e384f7e5a62fb7
- https://git.kernel.org/stable/c/7881faf862ee301ecfe3adc0725bd2fa0021cd95
- https://git.kernel.org/stable/c/b93d3bb3afe1b44489927de1eb4e66e8536a5935
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.