CVE-2026-98486net: ena: fix MMIO read buffer leak on probe failure
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: net: ena: fix MMIO read buffer leak on probe failure ena_device_init() initializes the MMIO read mechanism with ena_com_mmio_reg_read_request_init(), which allocates a coherent DMA buffer for MMIO read responses. The normal removal path releases this buffer through ena_com_mmio_reg_read_request_destroy(). However, if ena_probe() fails after ena_device_init() succeeds, the error path destroys the admin resources and eventually frees ena_dev without destroying the MMIO read request, leaving the coherent DMA buffer allocated. Call ena_com_mmio_reg_read_request_destroy() in the probe error path before releasing the remaining device resources. This issue was found by manual code inspection.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | 1738cd3ed342294360d6a74d4e58800004bff854 builds before 7bd3e9a2d0c288e54f51df260d9433163f5fbc1e; 1738cd3ed342294360d6a74d4e58800004bff854 builds before 30ff01b4c7e419bb70f40f01dcd7f6af680808b3; from 1738cd3ed342294360d6a74d4e58800004bff854 before 47785f9f638b064ce6e32e8e3b6f1ffd83849fc2; from 1738cd3ed342294360d6a74d4e58800004bff854 before 9476b4468862927297c94c440863cd8ed1e7cc83 | CNA record |
References
- https://git.kernel.org/stable/c/7bd3e9a2d0c288e54f51df260d9433163f5fbc1e
- https://git.kernel.org/stable/c/30ff01b4c7e419bb70f40f01dcd7f6af680808b3
- https://git.kernel.org/stable/c/47785f9f638b064ce6e32e8e3b6f1ffd83849fc2
- https://git.kernel.org/stable/c/9476b4468862927297c94c440863cd8ed1e7cc83
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.