CVE-2026-64333 Details
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.
A vulnerability in the Linux kernel's USB serial Digi Acceleport driver can lead to write buffer corruption. The issue arises in the 'digi_write_inb_command()' function, which is intended to wait for the write URB (USB Request Block) to be available or return an error. However, the function incorrectly updates the transfer buffer and attempts to resubmit the URB upon timeout. This flaw is exacerbated for commands like break control, which do not use a timeout, as the driver immediately corrupts the URB due to a faulty jiffies comparison. On 32-bit systems, this issue can take five minutes of uptime to manifest because of the INITIAL_JIFFIES value. The vulnerability affects several versions of the Linux kernel.
Users can update to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for updating the kernel can be found in the official Linux kernel documentation.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/1243f120790042c2ac92e84e797dacc75fff4366 | kernel.org | Patch |
| https://git.kernel.org/stable/c/24ca1fea8f2753bf33e1d458ec1ae5d9b7796a65 | kernel.org | Patch |
| https://git.kernel.org/stable/c/2f296974acc279f05f284441bfe3064074958d11 | kernel.org | Patch |
| https://git.kernel.org/stable/c/5d9dc88bdf8897788b0eed57113e9eca7fd42ea9 | kernel.org | Patch |
| https://git.kernel.org/stable/c/699dfb6917503b3cda4d5da6941cf79c3c1b4c8b | kernel.org | Patch |
| https://git.kernel.org/stable/c/a274b3794fe1852c3d9fe6d900b94053c0b03410 | kernel.org | Patch |
| https://git.kernel.org/stable/c/a3a13fdc53103b07335918e2cdeb465038a71725 | kernel.org | Patch |
| https://git.kernel.org/stable/c/e60e4873e9178da9f4f2674e4c2ff085d5a84f79 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 2.6.12.1, < 5.10.261 >= 5.11, < 5.15.212 >= 5.16, < 6.1.178 >= 6.2, < 6.6.145 >= 6.7, < 6.12.96 >= 6.13, < 6.18.39 >= 6.19, < 7.1.4 2.6.12 - 2.6.12 rc2 2.6.12 rc3 2.6.12 rc4 2.6.12 rc5 7.2 rc1 7.2 rc2 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 3, 2026 | Initial Analysis | [email protected] |
| Aug 17, 2026 | CVE Modified | kernel.org |
| Jul 27, 2026 | CVE Modified | kernel.org |
| Jul 25, 2026 | New CVE Received | kernel.org |