CVE-2026-43488
usb: xhci: Prevent interrupt storm on host controller error (HCE)
In the Linux kernel, the following vulnerability has been resolved: usb: xhci: Prevent interrupt storm on host controller error (HCE) The xHCI controller reports a Host Controller Error (HCE) in UAS Storage Device plug/unplug scenarios on Android devices. HCE is checked in xhci_irq() function and causes an interrupt storm (since the interrupt isn’t cleared), leading to severe system-level faults. When the xHC controller reports HCE in the interrupt handler, the driver only logs a warning and assumes xHC activity will stop as stated in xHCI specification. An interrupt storm does however continue on some hosts even after HCE, and only ceases after manually disabling xHC interrupt and stopping the controller by calling xhci_halt(). Add xhci_halt() to xhci_irq() function where STS_HCE status is checked, mirroring the existing error handling pattern used for STS_FATAL errors. This only fixes the interrupt storm. Proper HCE recovery requires resetting and re-initializing the xHC.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ 2a25e66d676dfb9b018abd503deed3d38a892dec; < b2dd9abf8c06cfcbcf242321fd54ae51a4807705 (affected, git) ≥ 2a25e66d676dfb9b018abd503deed3d38a892dec; < 6f91f3f087194c114d6d8ea4591b850bb00672f8 (affected, git) ≥ 2a25e66d676dfb9b018abd503deed3d38a892dec; < cd41e0d1df8fcf5eae294657da52b50d1ce03246 (affected, git) ≥ 2a25e66d676dfb9b018abd503deed3d38a892dec; < 09ff0099c6cf148ff1f7053b5b6c84beb1c2ef8d (affected, git) ≥ 2a25e66d676dfb9b018abd503deed3d38a892dec; < d6d5febd12452b7fd951fdd15c3ec262f01901a4 (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
6.2 (affected) ≥ 0; < 6.2 (unaffected, semver) ≥ 6.6.130; ≤ 6.6.* (unaffected, semver) ≥ 6.12.78; ≤ 6.12.* (unaffected, semver) ≥ 6.18.19; ≤ 6.18.* (unaffected, semver) ≥ 6.19.9; ≤ 6.19.* (unaffected, semver) ≥ 7.0; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/b2dd9abf8c06cfcbcf242321fd54ae51a4807705CNA: Linux
- https://git.kernel.org/stable/c/6f91f3f087194c114d6d8ea4591b850bb00672f8CNA: Linux
- https://git.kernel.org/stable/c/cd41e0d1df8fcf5eae294657da52b50d1ce03246CNA: Linux
- https://git.kernel.org/stable/c/09ff0099c6cf148ff1f7053b5b6c84beb1c2ef8dCNA: Linux
- https://git.kernel.org/stable/c/d6d5febd12452b7fd951fdd15c3ec262f01901a4CNA: Linux
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