SB20260720338 - Out-of-bounds read in Linux kernel usb serial driver
Published: July 20, 2026
Security Bulletin ID
SB20260720338
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Physical access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2026-63900)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 2.4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local attacker to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in the usa49wg indat transfer parser in drivers/usb/serial/keyspan.c when parsing malformed indat packets from a USB device. A local attacker can provide a specially crafted USB device to disclose sensitive information.
The issue can cause parsing of stale or uninitialised slab data.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0bde5431037a076ff3750da2165fd77a6f5ff058
- https://git.kernel.org/stable/c/3759a40738b83bb61699c85f063202b514b94f77
- https://git.kernel.org/stable/c/41d9673941eebdde62ee73848fcfe4ae1105c979
- https://git.kernel.org/stable/c/ab8336a7e414f018430aa1af3a46944032f7ff96
- https://git.kernel.org/stable/c/bd6c5fe59f374b63173afe5cf0ab38a9a370f2c1
- https://git.kernel.org/stable/c/e124120e89b61a967e40dee6b5e1ecafc45c09d9
- https://git.kernel.org/stable/c/ea2b792330b44b6d7ce671c3e1d59d0c121f7ed1
- https://git.kernel.org/stable/c/f7f566ad7519c7ca3bc9071350002940a2b0e22a