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CVE-2026-63901: USB: serial: digi_acceleport: fix memory corruption with small endpoints

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-19 · updated 2026-10-30
• Weakness: CWE-787

Description

In the Linux kernel, the following vulnerability has been resolved: USB: serial: digi_acceleport: fix memory corruption with small endpoints Add the missing bulk-out buffer size sanity checks to avoid out-of-bounds memory accesses or slab corruption should a malicious device report smaller buffers than expected.

Affected products

• Linux kernel: from 2.6.12.1 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.93; from 6.13 before 6.18.35 — fixed in 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.93, 6.18.35
• Linux kernel: 2.6.12 — fixed in 7.1

How to fix

Upgrade to a fixed version: Linux kernel 5.10.259, 5.15.210, 6.1.176, 6.6.143; Linux kernel 7.1. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/062dcc0b324afd03b1406f157190804f105718bb
• https://git.kernel.org/stable/c/25b93d0f229a115ab120106f37b9454170d4cfd4
• https://git.kernel.org/stable/c/41b645e791099f0038225da5e2ca3ca31f00d435
• https://git.kernel.org/stable/c/6ab1e9ae099577a1019312088309ecbad2da9a91
• https://git.kernel.org/stable/c/8a65db5edd7b63365e9c5b7d9f4b8f314696dc49
• https://git.kernel.org/stable/c/9469419b12a100e7e2ccdda64ab45b8368456c8a
• https://git.kernel.org/stable/c/cb3560e8eab1dfa1cac1ed52631adf8ec6ff2cd5
• https://git.kernel.org/stable/c/fd34198c2e5d164b57a7dcd4692626fece319225

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