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CVE-2026-80706

HIGHCVSS 7.8/10EPSS 0.16%

Last modified

CVE-2026-80706 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.16%

5.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c, < f6d9a6a9512430b395a1940d7b216394fd02d30b; >= 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c, < 84c850b08fc0d671c245144b619683129b55690a; >= 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c, < d0eac0ea7cf493e787fd7b4a556e43ef03cb4b50; >= 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c, < ae588e5b9cc268de1aabf30f939f0870717ca164; >= 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c, < ad331e26fd213a19fee0de18cdacd67b7ff5b478; >= 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c, < 2ee477e541a6d5e434d6a4041c6b677ab42e1d82; >= 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c, < 808ed899dcf8bdef66894fda5eb7ee4bb0eb8dc1; >= 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c, < 856d6cb04e5407523566b075841dcd6423757d1c
LinuxLinux2.6.38

References

Timeline

Published
Last Modified
Status
Received

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 severe is CVE-2026-80706?
CVE-2026-80706 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.
How do I fix CVE-2026-80706?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST