CVE-2026-89858

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Bound image count in qla2x00_update_fru_versions() qla2x00_update_fru_versions() copies the user-supplied BSG request into a fixed 256-byte stack buffer (bsg[DMA_POOL_SIZE]) and then iterates list->count times over the qla_image_version array embedded in that buffer, advancing the image pointer each iteration. count is taken directly from user input with no upper bound, while only (DMA_POOL_SIZE - sizeof(list->count)) / sizeof(struct qla_image_version) = 6 entries actually fit. A larger count walks the image pointer off the end of the stack buffer, reading adjacent kernel stack memory and sending it to the device via qla2x00_write_sfp(). Reject requests whose declared count does not fit in the buffer.

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EPSS — Exploit Prediction

0.0021

Probability of exploitation

0.11%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/047f1f7ee6f85bde28abfdda9fa550191ddc0532 https://git.kernel.org/stable/c/7b22b4cb8822805cef7ba618da6f76e1474d68bd https://git.kernel.org/stable/c/7e3154c97ec15460f715dbbe4097c255cce110b1 https://git.kernel.org/stable/c/a9706d5e754e77515a92bb532bd0d73644979a1f https://git.kernel.org/stable/c/af733bbfcf667af1871a2735fba2835b0da71efb https://git.kernel.org/stable/c/de62cf265dbe309f34f144a6cdbca9240317727e https://git.kernel.org/stable/c/f2d4f025b67fcbfb2bbbadd3b5a6a43c4b436514 https://git.kernel.org/stable/c/f93e8039e6fd54a3c027c6184daf00b745b576a0

Frequently Asked Questions

What is CVE-2026-89858? +

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Bound image count in qla2x00_update_fru_versions() qla2x00_update_fru_versions() copies the user-supplied BSG request into a fixed 256-byte stack buffer (bsg[DMA_POOL_SIZE]) and then iterates list->count times over the qla_image_version array embedded in that buffer, advancing the image pointer each iteration. count is taken directly from user input with no upper bound, while only (DMA_POOL_SIZE - sizeof(list->count)) / sizeof(struct qla_image_version) = 6 entries actually fit. A larger count walks the image pointer off the end of the stack buffer, reading adjacent kernel stack memory and sending it to the device via qla2x00_write_sfp(). Reject requests whose declared count does not fit in the buffer.

How do I check if I'm vulnerable to CVE-2026-89858? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.