CVE-2026-74376
Linux kernel RAID10 bio cleanup bug may cause kernel memory corruption or DoS.
Is CVE-2026-74376 being exploited?
Not confirmed. CVE-2026-74376 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 0.50% probability of exploitation in the next 30 days.
How severe is CVE-2026-74376?
CVE-2026-74376 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-2026-74376?
Yes. A fix has been recorded for CVE-2026-74376. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74376 affect?
CVE-2026-74376 affects Linux kernel md/raid10 (software RAID10), Linux systems using MD RAID10. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74376?
Apply kernel updates with the md/raid10 fix and reboot systems using software RAID10.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Improper bio cleanup in md/raid10 can cause kernel memory leak/corruption during discard, enabling local denial-of-service or possible privilege escalation.
Patch when possible
- affected>= d30588b2731fb01e1616cf16c3fe79a1443e29aa and < 3cb2a606ce4902eceabe68338df0653312f861f8
- affected>= d30588b2731fb01e1616cf16c3fe79a1443e29aa and < 561c9711e4f545d6464a023168bdee03b00fa945
- affected>= d30588b2731fb01e1616cf16c3fe79a1443e29aa and < ce3030e92f14362880055de5fe3c258971118853
- affected>= d30588b2731fb01e1616cf16c3fe79a1443e29aa and < 742e4afd247d9c972695227716b03d432a7e1d26
- affected>= d30588b2731fb01e1616cf16c3fe79a1443e29aa and < b7313f23ea5a79b199a007bfad64a866cc2c22e7
- affected>= d30588b2731fb01e1616cf16c3fe79a1443e29aa and < eb04e3e9c14ed15914f5fd2eae8b6435f54f095f
- affected>= d30588b2731fb01e1616cf16c3fe79a1443e29aa and < 6b8a26af065ddc93de2aa5c9f0df98dce9723442
- affected5.13
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.