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CVE-2026-74652serial: amba-pl011: cancel RS485 hrtimers after freeing IRQ

Description

In the Linux kernel, the following vulnerability has been resolved: serial: amba-pl011: cancel RS485 hrtimers after freeing IRQ The RS485 trigger hrtimers are embedded in the devm-managed port and can fire after it is freed. The IRQ handler can arm a timer, so free the IRQ first and then cancel both timers. Complete the RS485 stop without arming a timer, and cancel the timers in remove() for the suspend-then-unbind path, where shutdown is not called. This issue was found by an in-house static analysis tool.

Timeline

  1. ID reserved

    By Linux

  2. · 7 days later

    Published

  3. · 3 days later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-74652, by who scored it
Scored byCVSSScoreVector
LinuxCNA (assigner)3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Received3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.13% · top 98% of all CVEs (13 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Affected products

  • Linux · Linux

    • affected 2c1fd53af21b8cb13878b054894d33d3383eb1f3 – < 759ead98a39fb625be302f9aa66290985dcaa325
    • affected 2c1fd53af21b8cb13878b054894d33d3383eb1f3 – < e57f0aa5c35be37218ba0e4887b241584dd4b2d2
    • affected 2c1fd53af21b8cb13878b054894d33d3383eb1f3 – < 36672c8d7d14e9c43287528455d2c97b526ea6ad

  • Linux · Linux

    • affected 6.14
    • unaffected < 6.14
    • unaffected 6.18.45 – ≤ 6.18.*
    • unaffected 7.1.9 – ≤ 7.1.*
    • unaffected 7.2 – ≤ *

References

References3

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .