CVE-2026-97990
Description
In the Linux kernel, the following vulnerability has been resolved: vdpa_sim_net: check TX pull result before RX copy vringh_iov_pull_iotlb() returns a signed byte count. A failed TX pull is currently added to the unsigned byte counter and then passed as a size_t length to receive_filter() and vringh_iov_push_iotlb(). A negative error can therefore become a large length in the RX path. Handle non-positive pull results before every length use. Count the TX error and complete the consumed TX descriptor with zero bytes. I found this bug myself, though the patch was written with AI assistance.
How to fix
- Linux Linux1b803d382cde6d85755b363f22010208a04ba40a, c001abcde865b74231da8f1412c3217dbf66781e, 3af20238a09ca180d66623e3bed16b64e9975f39, 2bbf1c1f69991e28787e02b0a2f826289d5fc730, 0d195797a80b77f2ec56718cd26d3ee65d0093e8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | cfe226892913a448e83e7a19db93862baa3cb99c ≤ v < 1b803d382cde6d85755b363f22010208a04ba40a, cfe226892913a448e83e7a19db93862baa3cb99c ≤ v < c001abcde865b74231da8f1412c3217dbf66781e, cfe226892913a448e83e7a19db93862baa3cb99c ≤ v < 3af20238a09ca180d66623e3bed16b64e9975f39, cfe226892913a448e83e7a19db93862baa3cb99c ≤ v < 2bbf1c1f69991e28787e02b0a2f826289d5fc730, cfe226892913a448e83e7a19db93862baa3cb99c ≤ v < 0d195797a80b77f2ec56718cd26d3ee65d0093e8, 5.19 | 1b803d382cde6d85755b363f22010208a04ba40a, c001abcde865b74231da8f1412c3217dbf66781e, 3af20238a09ca180d66623e3bed16b64e9975f39, 2bbf1c1f69991e28787e02b0a2f826289d5fc730, 0d195797a80b77f2ec56718cd26d3ee65d0093e8 |
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