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CVE-2026-93819

Linux: PCI: mediatek: Protect root bus removal with rescan lock

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.17%Chance of exploitation activity in the next 30 days, higher than 6% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in5dd379acfa38c516e904bcfa693502cd585a0bbaAlso 8d910649725955435c6a807944108bca0570712d, 31e33dcc896527b3ad790fdc6aa6b8d2995c078bCVE List
Published24 Sep 2026Updated 3 Oct 2026CVE List

What fixes it

  • 5dd379acfa38c516e904bcfa693502cd585a0bbaLinuxCVE List
  • 8d910649725955435c6a807944108bca0570712dLinuxCVE List
  • 31e33dcc896527b3ad790fdc6aa6b8d2995c078bLinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

In the Linux kernel, the following vulnerability has been resolved:

PCI: mediatek: 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]

Text from CVE List

Affected versions 16

  • Linuxaffected: 031337ace2d1c22a447da6390716fe92592cdd6e before d54417acb22d9e8bc404a8598330bc9729ee7146CVE List
  • Linuxaffected: 031337ace2d1c22a447da6390716fe92592cdd6e before 5dd379acfa38c516e904bcfa693502cd585a0bbaCVE List
  • Linuxaffected: 031337ace2d1c22a447da6390716fe92592cdd6e before 8d910649725955435c6a807944108bca0570712dCVE List
  • Linuxaffected: 031337ace2d1c22a447da6390716fe92592cdd6e before 31e33dcc896527b3ad790fdc6aa6b8d2995c078bCVE List
  • Linuxaffected: 031337ace2d1c22a447da6390716fe92592cdd6e before c57b971765f835138fa2fce3f2a171b004cbb114CVE List
  • Linuxaffected: 031337ace2d1c22a447da6390716fe92592cdd6e before a568939487dcbc1a3e341208585e224be897e25eCVE List
  • Linuxaffected: 031337ace2d1c22a447da6390716fe92592cdd6e before a29812a55da8d0dbeb071b26ac428c338e3fc389CVE List
  • Linuxaffected: 4.20CVE List
  • Linuxunaffected: all versions before 4.20CVE List
  • Linuxunaffected: 5.10.271 through 5.10.*CVE List
  • Linuxunaffected: 5.15.222 through 5.15.*CVE List
  • Linuxunaffected: 6.1.189 through 6.1.*CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.111 through 6.12.*CVE List
  • Linuxunaffected: 6.18.53 through 6.18.*CVE List
  • Linuxunaffected: 7.2CVE List

References 7