CVE-2026-43283
Kernel DMA unmapping bug in ethernet path fixed
Is CVE-2026-43283 being exploited?
Not confirmed. CVE-2026-43283 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 0.12% probability of exploitation in the next 30 days.
How severe is CVE-2026-43283?
CVE-2026-43283 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-2026-43283?
Yes. A fix has been recorded for CVE-2026-43283. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-43283 affect?
CVE-2026-43283 affects Linux kernel (net/ethernet/ec_bhf). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-43283?
Apply kernel update containing the fix; reboot if required
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Potential memory corruption or data leakage via DMA path due to wrong DMA handle in error unmapping.
Patch when possible
- affected>= 6af55ff52b02d492d45db88df3e461fa51a6f753 and < 0f589ee54fd6d76d3f75e745f7f12c64cbd749e5
- affected>= 6af55ff52b02d492d45db88df3e461fa51a6f753 and < accd0599bc8e73b962247c6c6c70ca7aa1f8e8d0
- affected>= 6af55ff52b02d492d45db88df3e461fa51a6f753 and < 8320727be7ff704e07c87624efc2a4a75f54b3ce
- affected>= 6af55ff52b02d492d45db88df3e461fa51a6f753 and < 1e300c33ef3cc544c2b9c693778fe9490cfe9184
- affected>= 6af55ff52b02d492d45db88df3e461fa51a6f753 and < 1b1371cd4032ae859838ebc74215f569987bb197
- affected>= 6af55ff52b02d492d45db88df3e461fa51a6f753 and < 1b1d3c5d58a80a19d017a409aa2308162bab5bbf
- affected>= 6af55ff52b02d492d45db88df3e461fa51a6f753 and < 7e54ff938bebb173822b4c38b33fc164c1cabf92
- affected>= 6af55ff52b02d492d45db88df3e461fa51a6f753 and < ffe68c3766997d82e9ccaf1cdbd47eba269c4aa2
- affected3.15
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.