In the Linux kernel, the following vulnerability has been resolved: USB: serial: belkin_sa: validate interrupt status length The Belkin interrupt callback treats interrupt data as a four-byte status report and reads LSR/MSR fields at offsets 2 and 3. The interrupt-in buffer length is derived from endpoint wMaxPacketSize, and short interrupt transfers may complete successfully with a smaller actual_length. Check the completed interrupt packet length before parsing status fields so short interrupt endpoints and short successful packets are ignored instead of causing out-of-bounds or stale status-byte reads. KASAN report as below: BUG: KASAN: slab-out-of-bounds in belkin_sa_read_int_callback() Read of size 1 Call trace: belkin_sa_read_int_callback() (drivers/usb/serial/belkin_sa.c:202) __usb_hcd_giveback_urb() (drivers/usb/core/hcd.c:1630) dummy_timer() (?:?)

opensuse openSUSE-SU-2026:21555-1: openSUSE 16 : Security update for the Linux Kernel (Important) (openSUSE-SU-2026:21555-1)

An update of the linux package has been released.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - USB: serial: belkin_sa: validate interrupt status length The Belkin interrupt callback treats interrupt     data as a four-byte status report and reads LSR/MSR fields at offsets 2 and 3. The interrupt-in buffer     length is derived from endpoint wMaxPacketSize, and short interrupt transfers may complete successfully     with a smaller actual_length. Check the completed interrupt packet length before parsing status fields so     short interrupt endpoints and short successful packets are ignored instead of causing out-of-bounds or     stale status-byte reads. KASAN report as below: BUG: KASAN: slab-out-of-bounds in     belkin_sa_read_int_callback() Read of size 1 Call trace: belkin_sa_read_int_callback()     (drivers/usb/serial/belkin_sa.c:202) __usb_hcd_giveback_urb() (drivers/usb/core/hcd.c:1630) dummy_timer()     (?:?) (CVE-2026-63903)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
333941	Photon OS 5.0: Linux PHSA-2026-5.0-92-0926	Nessus	PhotonOS Local Security Checks	Local	high
333762	Photon OS 5.0: Linux PHSA-2026-5.0-92-0895	Nessus	PhotonOS Local Security Checks	Local	high
329326	Photon OS 5.0: Linux PHSA-2026-5.0-0926	Nessus	PhotonOS Local Security Checks	Local	high
328270	Linux Distros Unpatched Vulnerability : CVE-2026-63903	Nessus	Misc.	Local	medium
325574	Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.10-2026-124 (ALASKERNEL-5.10-2026-124)	Nessus	Amazon Linux Local Security Checks	Local	high
322944	Photon OS 5.0: Linux PHSA-2026-5.0-0895	Nessus	PhotonOS Local Security Checks	Local	high

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CVE-2026-63903

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