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.
How to fix
- Linux Linuxf6d9a6a9512430b395a1940d7b216394fd02d30b, 84c850b08fc0d671c245144b619683129b55690a, d0eac0ea7cf493e787fd7b4a556e43ef03cb4b50, ae588e5b9cc268de1aabf30f939f0870717ca164, ad331e26fd213a19fee0de18cdacd67b7ff5b478, 2ee477e541a6d5e434d6a4041c6b677ab42e1d82, 808ed899dcf8bdef66894fda5eb7ee4bb0eb8dc1, 856d6cb04e5407523566b075841dcd6423757d1c or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c ≤ v < f6d9a6a9512430b395a1940d7b216394fd02d30b, 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c ≤ v < 84c850b08fc0d671c245144b619683129b55690a, 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c ≤ v < d0eac0ea7cf493e787fd7b4a556e43ef03cb4b50, 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c ≤ v < ae588e5b9cc268de1aabf30f939f0870717ca164, 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c ≤ v < ad331e26fd213a19fee0de18cdacd67b7ff5b478, 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c ≤ v < 2ee477e541a6d5e434d6a4041c6b677ab42e1d82, 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c ≤ v < 808ed899dcf8bdef66894fda5eb7ee4bb0eb8dc1, 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c ≤ v < 856d6cb04e5407523566b075841dcd6423757d1c, 2.6.38 | f6d9a6a9512430b395a1940d7b216394fd02d30b, 84c850b08fc0d671c245144b619683129b55690a, d0eac0ea7cf493e787fd7b4a556e43ef03cb4b50, ae588e5b9cc268de1aabf30f939f0870717ca164, ad331e26fd213a19fee0de18cdacd67b7ff5b478, 2ee477e541a6d5e434d6a4041c6b677ab42e1d82, 808ed899dcf8bdef66894fda5eb7ee4bb0eb8dc1, 856d6cb04e5407523566b075841dcd6423757d1c |
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