CVE-2026-97481serial: 8250: fix possible ISR soft lockup
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4bce4a6f6318035d77d6b6199527b1950bb015f4; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8b67af8cd90542b2607623e3282811849e191b79; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 95d0b40c0623fd2b58c753f8dd6adda7263e3cd1; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 03ed804a0ddc3d069faf94c47f9e702afe5ca084; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 2881b2e6da02daea1eb8254247ba8fd20c9d3348; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4295c58990b7a84e8349a2226db692e252825b60; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 builds before 0c6bf45e5a345cc3b9ffbeaf9083ecac3c2293eb | CNA record |
References
- https://git.kernel.org/stable/c/4bce4a6f6318035d77d6b6199527b1950bb015f4
- https://git.kernel.org/stable/c/8b67af8cd90542b2607623e3282811849e191b79
- https://git.kernel.org/stable/c/95d0b40c0623fd2b58c753f8dd6adda7263e3cd1
- https://git.kernel.org/stable/c/03ed804a0ddc3d069faf94c47f9e702afe5ca084
- https://git.kernel.org/stable/c/2881b2e6da02daea1eb8254247ba8fd20c9d3348
- https://git.kernel.org/stable/c/4295c58990b7a84e8349a2226db692e252825b60
- https://git.kernel.org/stable/c/0c6bf45e5a345cc3b9ffbeaf9083ecac3c2293eb
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.