In the Linux kernel, the following vulnerability has been resolved:
USB: serial: cypress_m8: validate interrupt packet headers
cypress_read_int_callback() parses the interrupt-in buffer according to the selected Cypress packet format. Format 1 has a two-byte status/count header and format 2 has a one-byte combined status/count header. The usb-serial core sizes the interrupt-in buffer from the endpoint descriptor's wMaxPacketSize, and successful interrupt transfers can complete short when URB_SHORT_NOT_OK is not set.
Check that the completed packet contains the selected header before reading it. Malformed short reports are ignored and the interrupt URB is resubmitted through the existing retry path, preventing out-of-bounds header-byte reads.
KASAN report as below: KASAN slab-out-of-bounds in cypress_read_int_callback+0x240/0x7f0 Read of size 1 Call trace: cypress_read_int_callback() (drivers/usb/serial/cypress_m8.c:1009) __usb_hcd_giveback_urb() dummy_timer()
[ johan: use constants in header length sanity checks ]
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade bpftoolUpgrade kernel-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernelUpgrade kernel-tools-develUpgrade kernel-headersUpgrade python-perfUpgrade kernel-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-debuginfoUpgrade perf-debuginfoUpgrade kernel-livepatch-5.10.259-258.1043Upgrade perfUpgrade bpftool-debuginfoUpgrade kernel-tools | Aug 2, 2026 | Aug 2, 2026 |
| Debian | — | Upgrade linux | Jul 20, 2026 | Jul 20, 2026 |
| Redhat_linux | — | No solution exists | Jul 23, 2026 | Jul 19, 2026 |
| Ubuntu | — | Upgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-raspi-7.0Upgrade linux-image-aws-64k-7.0Upgrade linux-image-7.0.0-1008-oracle-64kUpgrade linux-image-7.0.0-1015-raspi-realtimeUpgrade linux-image-7.0.0-1009-azure-fdeUpgrade linux-image-7.0.0-1011-oracleUpgrade linux-image-oracle-64k-7.0Upgrade linux-image-aws-64kUpgrade linux-image-azure-fde-7.0Upgrade linux-image-azure-7.0Upgrade linux-image-7.0.0-1014-azureUpgrade linux-image-gcp-7.0Upgrade linux-image-awsUpgrade linux-image-raspi-realtimeUpgrade linux-image-oracleUpgrade linux-image-7.0.0-1011-oracle-64kUpgrade linux-image-gcpUpgrade linux-image-nvidia-bos-64kUpgrade linux-image-7.0.0-1016-nvidia-64kUpgrade linux-image-nvidia-bos-7.0Upgrade linux-image-gcp-64kUpgrade linux-image-nvidia-64k-7.0Upgrade linux-image-raspiUpgrade linux-image-nvidia-64kUpgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-nvidiaUpgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-azureUpgrade linux-image-gcp-64k-7.0Upgrade linux-image-nvidia-bosUpgrade linux-image-7.0.0-1010-azureUpgrade linux-image-raspi-realtime-7.0Upgrade linux-image-azure-fdeUpgrade linux-image-7.0.0-2016-nvidia-bos-64kUpgrade linux-image-oracle-7.0Upgrade linux-image-7.0.0-2016-nvidia-bosUpgrade linux-image-7.0.0-1010-ibmUpgrade linux-image-ibmUpgrade linux-image-aws-7.0Upgrade linux-image-7.0.0-1016-nvidiaUpgrade linux-image-7.0.0-1008-oracleUpgrade linux-image-oracle-64kUpgrade linux-image-ibm-7.0Upgrade linux-image-7.0.0-1015-raspiUpgrade linux-image-7.0.0-1009-aws-64kUpgrade linux-image-7.0.0-1009-awsUpgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-nvidia-7.0 | Jul 21, 2026 | Jul 20, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 27, 2026 | Jul 19, 2026 |
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