CVE-2026-74575
Use-after-free in Linux Thunderbolt xdomain allowing kernel crash or escalation.
Is CVE-2026-74575 being exploited?
Not confirmed. CVE-2026-74575 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.24% probability of exploitation in the next 30 days.
How severe is CVE-2026-74575?
CVE-2026-74575 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-74575?
Yes. A fix has been recorded for CVE-2026-74575. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74575 affect?
CVE-2026-74575 affects Linux kernel (Thunderbolt xdomain subsystem), Systems with Thunderbolt ports/controllers. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74575?
Apply vendor/kernel update that fixes Thunderbolt xdomain; restrict/untrusted Thunderbolt device access until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Kernel use-after-free via Thunderbolt disconnect may cause crash, local privilege escalation, or kernel RCE if triggered by a malicious/untrusted device.
Patch when possible
- affected>= 559c1e1e013437bf190469efbcbd8bc803285853 and < d4fa0d544c04dea636bf821ff5582cd7d63e2c34
- affected>= 559c1e1e013437bf190469efbcbd8bc803285853 and < cfbd2dba3d862c9be8c92bea2a357d9ed828a54a
- affected>= 559c1e1e013437bf190469efbcbd8bc803285853 and < dc11d5118f9da6ea28487ffe055de5a0d0734125
- affected>= 559c1e1e013437bf190469efbcbd8bc803285853 and < 91b40862a02000f490b63f1d315be3ee31e83871
- affected>= 559c1e1e013437bf190469efbcbd8bc803285853 and < 33c0ee18cf8665c974b00f4e0ba769fbc07efe10
- affected>= 559c1e1e013437bf190469efbcbd8bc803285853 and < 54a62153c765cd24239cde1f2633f2a2fd005368
- affected>= 559c1e1e013437bf190469efbcbd8bc803285853 and < 2aa2cde2cc79a79d8ea4a15be9f4a67fc528ae91
- affected>= 559c1e1e013437bf190469efbcbd8bc803285853 and < 2c5d2d3c3f70cde2565d7b279b544893a2035842
- affected5.2
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.