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.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-tools-develUpgrade kernel-develUpgrade kernel-tools-debuginfoUpgrade perf-debuginfoUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade python-perfUpgrade bpftool-debuginfoUpgrade kernel-toolsUpgrade perfUpgrade kernel-headersUpgrade kernelUpgrade kernel-livepatch-5.10.165-143.735Upgrade python-perf-debuginfoUpgrade kernel-livepatch-4.14.304-226.531Upgrade kernel-debuginfo-common-x86_64Upgrade bpftool | 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-hweUpgrade linux-aws-fipsUpgrade linux-gcp-4.15Upgrade linux-xilinx-zynqmpUpgrade linux-azure-fde-5.15Upgrade linux-gcp-fipsUpgrade linux-gcpUpgrade linux-fipsUpgrade linux-azure-5.15Upgrade linux-oracleUpgrade linux-nvidiaUpgrade linux-ibm-5.4Upgrade linux-azure-fipsUpgrade linux-intel-iot-realtimeUpgrade linux-azure-4.15Upgrade linux-azure-5.4Upgrade linuxUpgrade linux-oracle-5.15Upgrade linux-gcp-5.4Upgrade linux-riscv-5.15Upgrade linux-gkeopUpgrade linux-ibmUpgrade linux-hwe-5.4Upgrade linux-aws-5.4Upgrade linux-awsUpgrade linux-realtimeUpgrade linux-azureUpgrade linux-intel-iotg-5.15Upgrade linux-nvidia-tegra-5.15Upgrade linux-aws-5.15Upgrade linux-kvmUpgrade linux-aws-hweUpgrade linux-gkeUpgrade linux-gcp-5.15Upgrade linux-bluefieldUpgrade linux-lowlatencyUpgrade linux-intel-iotgUpgrade linux-lowlatency-hwe-5.15Upgrade linux-raspiUpgrade linux-oracle-5.4Upgrade linux-iotUpgrade linux-hwe-5.15Upgrade linux-raspi-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 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub