CVE-2026-64333

USB: serial: digi_acceleport: fix write buffer corruption

State: Published
Severity: 7.8 High
Published: Jul 25, 2026
Updated: Oct 19, 2026
Reserved: Jul 19, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

USB: serial: digi_acceleport: fix write buffer corruption

The digi_write_inb_command() is supposed to wait for the write urb to become available or return an error, but instead it updates the transfer buffer and tries to resubmit the urb on timeout.

To make things worse, for commands like break control where no timeout is used, the driver would corrupt the urb immediately due to a broken jiffies comparison (on 32-bit machines this takes five minutes of uptime to trigger due to INITIAL_JIFFIES).

Fix this by adding the missing return on timeout and waiting indefinitely when no timeout has been specified as intended.

This issue was (sort of) flagged by Sashiko when reviewing an unrelated change to the driver.

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

CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
LinuxLinux	1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 5d9dc88bdf8897788b0eed57113e9eca7fd42ea9Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 2f296974acc279f05f284441bfe3064074958d11Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e60e4873e9178da9f4f2674e4c2ff085d5a84f79Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 699dfb6917503b3cda4d5da6941cf79c3c1b4c8bAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before a274b3794fe1852c3d9fe6d900b94053c0b03410Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 1243f120790042c2ac92e84e797dacc75fff4366Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before a3a13fdc53103b07335918e2cdeb465038a71725Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 24ca1fea8f2753bf33e1d458ec1ae5d9b7796a65Affected
LinuxLinux	2.6.12Affected before 2.6.12Not affected 5.10.261 through 5.10.Not affected 5.15.212 through 5.15.Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.96 through 6.12.Not affected 6.18.39 through 6.18.Not affected 7.1.4 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 5d9dc88bdf8897788b0eed57113e9eca7fd42ea9Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 2f296974acc279f05f284441bfe3064074958d11Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e60e4873e9178da9f4f2674e4c2ff085d5a84f79Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 699dfb6917503b3cda4d5da6941cf79c3c1b4c8bAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before a274b3794fe1852c3d9fe6d900b94053c0b03410Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 1243f120790042c2ac92e84e797dacc75fff4366Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before a3a13fdc53103b07335918e2cdeb465038a71725Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 24ca1fea8f2753bf33e1d458ec1ae5d9b7796a65Affected

LinuxLinux

2.6.12Affected
before 2.6.12Not affected
5.10.261 through 5.10.*Not affected
5.15.212 through 5.15.*Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.96 through 6.12.*Not affected
6.18.39 through 6.18.*Not affected
7.1.4 through 7.1.*Not affected
7.2 and laterNot affected

References

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