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

High 7.8 EPSS 0.2% Linux kernel

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.

CVE-2026-63901CVE identifier
7.8CVSS 3.1 base score (high)
0.2%EPSS: chance of exploitation in the next 30 days (higher than 7% of CVEs)
2026-07-19published

What do these terms mean? CVE · CVSS score · exploited (KEV) · EPSS · backported fix · all terms

What to do now

Check whether you run Linux kernel and which version (commands below).
Install the fixed version for your system: see “Patch it” below.
Reboot into the new kernel (uname -r to confirm); live patching (kpatch, Ubuntu Livepatch, SUSE kGraft/klp) can defer the reboot for some CVEs

Affected and fixed versions

Affected:

Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before fd34198c2e5d164b57a7dcd4692626fece319225
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 25b93d0f229a115ab120106f37b9454170d4cfd4
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 6ab1e9ae099577a1019312088309ecbad2da9a91
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 8a65db5edd7b63365e9c5b7d9f4b8f314696dc49
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 41b645e791099f0038225da5e2ca3ca31f00d435
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 062dcc0b324afd03b1406f157190804f105718bb
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 9469419b12a100e7e2ccdda64ab45b8368456c8a
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before cb3560e8eab1dfa1cac1ed52631adf8ec6ff2cd5
Linux Linux 2.6.12

Patch it

Use the commands for your system. Distribution packages often keep an older version number with the fix backported, so compare with the fixed package versions in the table below, not only with the upstream version.

Debian

sudo apt update
sudo apt install --only-upgrade linux-image-amd64

Ubuntu

sudo apt update
sudo apt install --only-upgrade linux-image-generic (or the installed flavour: linux-image-aws, -azure, -gcp, -virtual)

RHEL, AlmaLinux, Rocky, Oracle

sudo dnf upgrade --refresh kernel

Fedora

sudo dnf upgrade --refresh kernel

SUSE / openSUSE

sudo zypper refresh
sudo zypper update kernel-default

Amazon Linux

sudo dnf upgrade --releasever=latest kernel kernel6.12

Arch Linux

sudo pacman -Syu

Alpine

apk update && apk upgrade linux-lts linux-virt

FreeBSD

not Linux

General update steps for every system are on the Linux and Unix & BSD pages; after updating, see which services to restart.

Fix status in Linux distributions

Release	Package	Status	Fixed version / advisory
Debian 12	`linux`	fixed	`6.1.176-1`
Debian 13	`linux`	fixed	`6.12.94-1`
Debian testing	`linux`	fixed	`7.0.12-1`
Red Hat Enterprise Linux 9	`kernel`	affected
Red Hat Enterprise Linux 9	`kernel-rt`	affected
Red Hat Enterprise Linux 8	`kernel`	affected
Red Hat Enterprise Linux 8	`kernel-rt`	affected
Red Hat Enterprise Linux 7	`kernel`	affected
Red Hat Enterprise Linux 7	`kernel-rt`	affected
Red Hat Enterprise Linux 6	`kernel`	out of support scope
Red Hat Enterprise Linux 10	`kernel`	affected

From the Debian security tracker, Ubuntu CVE tracker and Red Hat Security Data API, refreshed every few hours.

Sources

Page generated automatically from official sources on 2026-11-03 18:05 UTC. Always confirm with your vendor's advisory.