CVE-2026-80706

can: softing: fw_parse(): validate firmware record spans

State: Published
Severity: 7.8 High
Published: Aug 28, 2026
Updated: Oct 16, 2026
Reserved: Aug 26, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	03fd3cf5a179da12e6bee5e9d74b648aff68dc4c to before f6d9a6a9512430b395a1940d7b216394fd02d30bAffected 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c to before 84c850b08fc0d671c245144b619683129b55690aAffected 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c to before d0eac0ea7cf493e787fd7b4a556e43ef03cb4b50Affected 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c to before ae588e5b9cc268de1aabf30f939f0870717ca164Affected 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c to before ad331e26fd213a19fee0de18cdacd67b7ff5b478Affected 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c to before 2ee477e541a6d5e434d6a4041c6b677ab42e1d82Affected 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c to before 808ed899dcf8bdef66894fda5eb7ee4bb0eb8dc1Affected 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c to before 856d6cb04e5407523566b075841dcd6423757d1cAffected
LinuxLinux	2.6.38Affected before 2.6.38Not affected 5.10.265 through 5.10.Not affected 5.15.216 through 5.15.Not affected 6.1.183 through 6.1.Not affected 6.6.151 through 6.6.Not affected 6.12.103 through 6.12.Not affected 6.18.44 through 6.18.Not affected 7.1.8 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

03fd3cf5a179da12e6bee5e9d74b648aff68dc4c to before f6d9a6a9512430b395a1940d7b216394fd02d30bAffected
03fd3cf5a179da12e6bee5e9d74b648aff68dc4c to before 84c850b08fc0d671c245144b619683129b55690aAffected
03fd3cf5a179da12e6bee5e9d74b648aff68dc4c to before d0eac0ea7cf493e787fd7b4a556e43ef03cb4b50Affected
03fd3cf5a179da12e6bee5e9d74b648aff68dc4c to before ae588e5b9cc268de1aabf30f939f0870717ca164Affected
03fd3cf5a179da12e6bee5e9d74b648aff68dc4c to before ad331e26fd213a19fee0de18cdacd67b7ff5b478Affected
03fd3cf5a179da12e6bee5e9d74b648aff68dc4c to before 2ee477e541a6d5e434d6a4041c6b677ab42e1d82Affected
03fd3cf5a179da12e6bee5e9d74b648aff68dc4c to before 808ed899dcf8bdef66894fda5eb7ee4bb0eb8dc1Affected
03fd3cf5a179da12e6bee5e9d74b648aff68dc4c to before 856d6cb04e5407523566b075841dcd6423757d1cAffected

LinuxLinux

2.6.38Affected
before 2.6.38Not affected
5.10.265 through 5.10.*Not affected
5.15.216 through 5.15.*Not affected
6.1.183 through 6.1.*Not affected
6.6.151 through 6.6.*Not affected
6.12.103 through 6.12.*Not affected
6.18.44 through 6.18.*Not affected
7.1.8 through 7.1.*Not affected
7.2 and laterNot affected

References

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