CVE-2026-72367
Linux iomap underflow bug can corrupt files during concurrent write/truncate
Is CVE-2026-72367 being exploited?
Not confirmed. CVE-2026-72367 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 0.58% probability of exploitation in the next 30 days.
How severe is CVE-2026-72367?
CVE-2026-72367 is rated High. 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-2026-72367?
Yes. A fix has been recorded for CVE-2026-72367. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-72367 affect?
CVE-2026-72367 affects Linux kernel (iomap subsystem), Linux distributions using affected kernels. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-72367?
Apply vendor/kernel updates and reboot affected hosts promptly
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local concurrent writes/truncates can underflow io_size, causing unsigned wrap and file/data corruption or loss during writeback.
Patch when possible
- affected>= 51d20d1dacbec589d459e11fc88fbca419f84a99 and < 1f38f65bf965fce9aa159d45c5347538f56c5973
- affected>= 51d20d1dacbec589d459e11fc88fbca419f84a99 and < 7f7780abb4c0fdc9a2603aea8e985ff14ee900e0
- affected>= 51d20d1dacbec589d459e11fc88fbca419f84a99 and < 55ec50d046c03b3724741957f7b007856e36dbe7
- affected82c59a86a247a8970d353d10f52a37e5564fb137
- affected>= 6.12.10 and < 6.13
- affected6.13
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.