CVE-2026-80706

Description

In the Linux kernel, the following vulnerability has been resolved: can: softing: fw_parse(): validate firmware record spans fw_parse() reads a fixed record header, a firmware-provided payload, and a trailing checksum without knowing the end of the firmware blob. A truncated record can therefore make those reads exceed the blob. The same record also supplies addresses and lengths for writes into DPRAM. The generic loader uses wrap-prone mixed signed arithmetic for its bounds check, while the application loader does not bound the staging copy at all. Pass the firmware end to the parser and validate the full source record. Use a signed wide offset for generic DPRAM records and validate the application staging span against the mapped DPRAM before copying.

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EPSS — Exploit Prediction

0.0016

Probability of exploitation

0.06%

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/2ee477e541a6d5e434d6a4041c6b677ab42e1d82 https://git.kernel.org/stable/c/808ed899dcf8bdef66894fda5eb7ee4bb0eb8dc1 https://git.kernel.org/stable/c/84c850b08fc0d671c245144b619683129b55690a https://git.kernel.org/stable/c/856d6cb04e5407523566b075841dcd6423757d1c https://git.kernel.org/stable/c/ad331e26fd213a19fee0de18cdacd67b7ff5b478 https://git.kernel.org/stable/c/ae588e5b9cc268de1aabf30f939f0870717ca164 https://git.kernel.org/stable/c/d0eac0ea7cf493e787fd7b4a556e43ef03cb4b50 https://git.kernel.org/stable/c/f6d9a6a9512430b395a1940d7b216394fd02d30b

Frequently Asked Questions

What is CVE-2026-80706? +

In the Linux kernel, the following vulnerability has been resolved: can: softing: fw_parse(): validate firmware record spans fw_parse() reads a fixed record header, a firmware-provided payload, and a trailing checksum without knowing the end of the firmware blob. A truncated record can therefore make those reads exceed the blob. The same record also supplies addresses and lengths for writes into DPRAM. The generic loader uses wrap-prone mixed signed arithmetic for its bounds check, while the application loader does not bound the staging copy at all. Pass the firmware end to the parser and validate the full source record. Use a signed wide offset for generic DPRAM records and validate the application staging span against the mapped DPRAM before copying.

How do I check if I'm vulnerable to CVE-2026-80706? +

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.