In the Linux kernel, the following vulnerability has been resolved:
fs: jfs: fix shift-out-of-bounds in dbAllocAG
Syzbot found a crash : UBSAN: shift-out-of-bounds in dbAllocAG. The underlying bug is the missing check of bmp->db_agl2size. The field can be greater than 64 and trigger the shift-out-of-bounds.
Fix this bug by adding a check of bmp->db_agl2size in dbMount since this field is used in many following functions. The upper bound for this field is L2MAXL2SIZE - L2MAXAG, thanks for the help of Dave Kleikamp. Note that, for maintenance, I reorganized error handling code of dbMount.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-livepatch-4.14.304-226.531Upgrade kernel-livepatch-5.10.165-143.735Upgrade python-perf-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernelUpgrade bpftoolUpgrade python-perfUpgrade kernel-headersUpgrade kernel-tools-debuginfoUpgrade bpftool-debuginfoUpgrade perfUpgrade kernel-toolsUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-develUpgrade kernel-tools-develUpgrade perf-debuginfo | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Oct 24, 2025 | Oct 24, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Oct 22, 2025 |
| Ubuntu | — | Upgrade linux-hwe-5.4Upgrade linux-gcpUpgrade linux-azure-5.4Upgrade linux-nvidiaUpgrade linux-azure-fipsUpgrade linuxUpgrade linux-gcp-5.4Upgrade linux-gcp-4.15Upgrade linux-intel-iot-realtimeUpgrade linux-gkeopUpgrade linux-riscv-5.15Upgrade linux-ibmUpgrade linux-oracleUpgrade linux-ibm-5.4Upgrade linux-xilinx-zynqmpUpgrade linux-aws-fipsUpgrade linux-fipsUpgrade linux-hweUpgrade linux-azure-4.15Upgrade linux-azure-5.15Upgrade linux-azure-fde-5.15Upgrade linux-oracle-5.15Upgrade linux-gcp-fipsUpgrade linux-raspiUpgrade linux-aws-5.4Upgrade linux-kvmUpgrade linux-iotUpgrade linux-aws-hweUpgrade linux-lowlatency-hwe-5.15Upgrade linux-nvidia-tegra-5.15Upgrade linux-hwe-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-raspi-5.4Upgrade linux-realtimeUpgrade linux-azureUpgrade linux-awsUpgrade linux-bluefieldUpgrade linux-gkeUpgrade linux-aws-5.15Upgrade linux-azure-fdeUpgrade linux-lowlatencyUpgrade linux-gcp-5.15Upgrade linux-intel-iotgUpgrade linux-oracle-5.4 | Oct 28, 2025 | Oct 24, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Oct 22, 2025 |
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