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CVE-2026-93086

firmware: arm_scmi: Avoid IDR updates while cleaning channels

Description

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Avoid IDR updates while cleaning channels scmi_cleanup_channels() walks the TX/RX channel IDRs with idr_for_each() to free transport resources and destroy the dedicated transport devices before calling idr_destroy(). The destroy callback removed each entry from the same IDR being walked. That is not needed for this cleanup path, and it is unsafe because idr_for_each() has not advanced its radix-tree iterator while the callback is running. Removing the current entry from the callback can invalidate the iterator state. The callback also cannot be protected by rcu_read_lock(), because scmi_device_destroy() may sleep. Leave IDR teardown to the following idr_destroy() call and keep the callback limited to device destruction.

Timeline

  1. ID reserved

    By Linux

  2. Published

  3. · 43 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

No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.

EPSS (exploitation in 30 days)
0.21% · top 89% of all CVEs (12 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.

Affected products

  • Linux · Linux

    • affected 22f7f35fd71b597a5d916e41d7646be6ee530c86 – < f50698c617350a6e2064dffd6cff3f391e142f55
    • affected 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 – < aed24a3c63920539e9de7fbfe7929a2e7c888cd2
    • affected 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 – < 431c6b872ba7fedcc5a3afb0ec3517db4d95d088
    • affected 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 – < 54e5a4f7d83db4552d963d0785be32d9df680dcd
    • affected 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 – < bab26acebe55e8ad3ab545abda72faa7ca28c477
    • affected 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 – < c38b1e19485aaa820e52cfe162525a8af67563da
  • Linux · Linux

    • affected 6.3
    • unaffected < 6.3
    • unaffected 6.6.157 – ≤ 6.6.*
    • unaffected 6.12.110 – ≤ 6.12.*
    • unaffected 6.18.52 – ≤ 6.18.*
    • unaffected 7.2.6 – ≤ 7.2.*
    • unaffected 7.3 – ≤ *

References

References6

Sources

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

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Record last updated .