Riskcovery

CVE-2026-97481

serial: 8250: fix possible ISR soft lockup

State
Published
Severity
Not scored
Published
Sep 24, 2026
Updated
Oct 3, 2026
Reserved
Sep 24, 2026

Read the record on cve.org

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 4bce4a6f6318035d77d6b6199527b1950bb015f4Affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 8b67af8cd90542b2607623e3282811849e191b79Affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 95d0b40c0623fd2b58c753f8dd6adda7263e3cd1Affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 03ed804a0ddc3d069faf94c47f9e702afe5ca084Affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 2881b2e6da02daea1eb8254247ba8fd20c9d3348Affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 4295c58990b7a84e8349a2226db692e252825b60Affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 0c6bf45e5a345cc3b9ffbeaf9083ecac3c2293ebAffected
LinuxLinux
  • 2.6.12Affected
  • before 2.6.12Not affected
  • 5.10.271 through 5.10.*Not affected
  • 5.15.222 through 5.15.*Not affected
  • 6.1.189 through 6.1.*Not affected
  • 6.6.158 through 6.6.*Not affected
  • 6.12.111 through 6.12.*Not affected
  • 6.18.53 through 6.18.*Not affected
  • 7.2 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.