CVE-2026-89730

Description

In the Linux kernel, the following vulnerability has been resolved: fpga: altera-cvp: Avoid out-of-bounds read in trailing byte write The trailing byte path in altera_cvp_send_block() dereferences a u32 pointer even when only 1-3 bytes remain in the input buffer. If the buffer ends at a page or scatterlist boundary, this can read past the valid image data and fault. Copy the remaining bytes into a zero-initialized u32 before writing the final word so only valid bytes are read from the input 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/2564ac3d3b8b47cd9692a5bf42d668ed7218b54e https://git.kernel.org/stable/c/3b8938f5fbcf4a918785f9cb4b108782eb4ea717 https://git.kernel.org/stable/c/447b3c893987a0106a65f04b62ec3271892e9d98 https://git.kernel.org/stable/c/4dc1051939e499c838229af035464a5fc7671198 https://git.kernel.org/stable/c/827ec385458adeeda651de2b6f3537e386b1a8d9 https://git.kernel.org/stable/c/8f3365ed2a5db2ac95ab70a6c47561db39d24537 https://git.kernel.org/stable/c/9da70a43b5fea60d758137f7f0ccfe19356cb5bb https://git.kernel.org/stable/c/b138bc665e21d4422382ab43aebdf0a2b7bb9cb3

Frequently Asked Questions

What is CVE-2026-89730? +

In the Linux kernel, the following vulnerability has been resolved: fpga: altera-cvp: Avoid out-of-bounds read in trailing byte write The trailing byte path in altera_cvp_send_block() dereferences a u32 pointer even when only 1-3 bytes remain in the input buffer. If the buffer ends at a page or scatterlist boundary, this can read past the valid image data and fault. Copy the remaining bytes into a zero-initialized u32 before writing the final word so only valid bytes are read from the input buffer.

How do I check if I'm vulnerable to CVE-2026-89730? +

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.