In the Linux kernel, the following vulnerability has been resolved:
serial: 8250: fix possible ISR soft lockup
There are rare cases in which the host gets stuck in the ISR because it is flooded with messages during the startup phase.
The reason for the soft lockup in the ISR is the missing FIFO error IRQ (FIFOE) handling. Not handling it and reporting IRQ_HANDLED triggers the IRQ immediately again.
Fix this by adding a check for the FIFOE status and clearing the FIFO if no data is ready (DR).
This behavior was observed on an AM62L device which uses the OMAP 8250 driver. Fix it for all 8250 drivers, since the OMAP driver's special IRQ setup handling may trigger this behavior more frequently, but it is not ensured that other 8250 drivers aren't affected.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.12-modules-extraUpgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel-livepatch-6.12.111-136.204Upgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.12-headersUpgrade kernel6.12-modules-extra-commonUpgrade kernel6.12Upgrade perf6.12Upgrade kernel6.12-develUpgrade kernel6.12-debuginfoUpgrade perf6.12-debuginfoUpgrade kernel6.12-tools-debuginfoUpgrade kernel6.12-toolsUpgrade bpftool6.12-debuginfoUpgrade kernel6.12-tools-develUpgrade python3-perf6.12-debuginfoUpgrade bpftool6.12Upgrade python3-perf6.12 | Oct 13, 2026 | Sep 24, 2026 |
| Debian | — | Upgrade linuxUpgrade linux-6.12 | Sep 30, 2026 | Sep 24, 2026 |
| Redhat_linux | — | No solution exists | Oct 1, 2026 | Sep 24, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 13, 2026 | Sep 24, 2026 |
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