Affects the core Linux kernel, widely deployed across industries; could cause outages or remote impact.
CVE-2026-43125
Linux kernel: length check missing in dlm; may cause out-of-bounds write.
Is CVE-2026-43125 being exploited?
Not confirmed. CVE-2026-43125 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 0.43% probability of exploitation in the next 30 days.
How severe is CVE-2026-43125?
CVE-2026-43125 is rated Critical with a CVSS score of 9.8. 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-2026-43125?
Yes. A fix has been recorded for CVE-2026-43125. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-43125 affect?
CVE-2026-43125 affects Linux kernel. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-43125?
Update to patched kernel and reboot
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote memory corruption via crafted network input; possible kernel panic or privilege escalation.
Patch when possible
- affected>= 7210cb7a72a22303cdb225bd1aea28697a17bbae and < 67288113c5e6cf9e659b4065c0ed6f16100e0c71
- affected>= 7210cb7a72a22303cdb225bd1aea28697a17bbae and < 082083c9fbd99422a0370fe2102144a231c9f5d6
- affected>= 7210cb7a72a22303cdb225bd1aea28697a17bbae and < 5f053a2e7209d326cbbc07738fa6d6893d307438
- affected>= 7210cb7a72a22303cdb225bd1aea28697a17bbae and < 080e5563f878c64e697b89e7439d730d0daad882
- affected3.4
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.