CVE-2026-74275
Linux kernel CXL driver out-of-bounds access; possible kernel crash or privilege escalation
Is CVE-2026-74275 being exploited?
Not confirmed. CVE-2026-74275 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 0.13% probability of exploitation in the next 30 days.
How severe is CVE-2026-74275?
CVE-2026-74275 is rated High with a CVSS score of 8.4. 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-2026-74275?
Yes. A fix has been recorded for CVE-2026-74275. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74275 affect?
CVE-2026-74275 affects Linux kernel (cxl/cxl_region driver), Systems with CXL hardware, Linux distributions using affected upstream kernels. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74275?
Apply kernel updates with the cxl fix; restrict access to CXL devices until patched
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local kernel memory corruption via negative index in cxl driver causing OOB access; can trigger kernel panic or local privilege escalation.
Patch when possible
- affected>= 87805c32e6ad7b5ce2d9f7f47e76081857a4a335 and < 44b2397eb67b7f728640989a22d062e41f94ab64
- affected>= 87805c32e6ad7b5ce2d9f7f47e76081857a4a335 and < cbda6a2c2bec2a5fb30a2ce85baeab15b5fc7db3
- affected7.1
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.