PCI: altera: Protect root bus removal with rescan lock
Priority LOW 22Published · Updated
Key facts
- Attack vector
- —
- Privileges required
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- User interaction
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- Attack complexity
- —
- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Fixed
No CVSS vector from any source. Fix status from CNA.
Summary
In the Linux kernel, the following vulnerability has been resolved: PCI: altera: Protect root bus removal with rescan lock Hold the pci_rescan_remove_lock lock while stopping and removing a root bus to avoid racing with concurrent rescan or hotplug operations triggered via sysfs. Such races may lead to use-after-free issues or system crashes. [bhelgaas: commit log]
Why it matters now
EPSS 0.00173 6th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 5.10.271, 5.15.222, 6.1.189 +4
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 7 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift Container Platform 5
Timeline
- 2026-10-02 Threatist record created from CVE-2026-93821
- 2026-10-03 Alias added: GHSA-4f4q-pcpx-7p8f
- 2026-10-03 Fix available: Linux/Linux@442b7f2a093b4a75f8963aaa7cbb2b8df35a6ac3, Linux/Linux@4b69c63cc247fc0f499fbd11076fee9c2a6e6fd7, Linux/[email protected] +5 · CNA
- 2026-10-03 4 new references · CNA
- 2026-11-06 Affected versions changed · Red Hat
References
Other 7
- https://git.kernel.org/stable/c/cf9d84d1b6a7c3f3780c043df220a7e9e38137eb
- https://git.kernel.org/stable/c/fc462f1bdeaea9789928cbfdf5e069ee559c7642
- https://git.kernel.org/stable/c/442b7f2a093b4a75f8963aaa7cbb2b8df35a6ac3
- https://git.kernel.org/stable/c/4b69c63cc247fc0f499fbd11076fee9c2a6e6fd7
- https://git.kernel.org/stable/c/c0cd65906e5f7e293ef2568c9524cc0a918333c3
- https://git.kernel.org/stable/c/7cbb8f2750d91e64caff89e164ac8280bb80bedc
- https://git.kernel.org/stable/c/a8759c8ac48c0419f5899e95a6ffc611b07c965b
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- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
Sources
- CVE-2026-93821 · CVE Program
- CVE-2026-93821 · NVD
- FIRST EPSS
- GHSA-4f4q-pcpx-7p8f · GitHub Advisory Database · CC BY 4.0
- CVE-2026-93821 · Red Hat security data · CC BY 4.0
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