CVE-2026-97990vdpa_sim_net: check TX pull result before RX copy
Updated under an hour ago ()
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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: 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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:H
- 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 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from cfe226892913a448e83e7a19db93862baa3cb99c before 1b803d382cde6d85755b363f22010208a04ba40a; from cfe226892913a448e83e7a19db93862baa3cb99c before c001abcde865b74231da8f1412c3217dbf66781e; from cfe226892913a448e83e7a19db93862baa3cb99c before 3af20238a09ca180d66623e3bed16b64e9975f39; from cfe226892913a448e83e7a19db93862baa3cb99c before 2bbf1c1f69991e28787e02b0a2f826289d5fc730; from cfe226892913a448e83e7a19db93862baa3cb99c before 0d195797a80b77f2ec56718cd26d3ee65d0093e8 | CNA record |
References
- https://git.kernel.org/stable/c/1b803d382cde6d85755b363f22010208a04ba40a
- https://git.kernel.org/stable/c/c001abcde865b74231da8f1412c3217dbf66781e
- https://git.kernel.org/stable/c/3af20238a09ca180d66623e3bed16b64e9975f39
- https://git.kernel.org/stable/c/2bbf1c1f69991e28787e02b0a2f826289d5fc730
- https://git.kernel.org/stable/c/0d195797a80b77f2ec56718cd26d3ee65d0093e8
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.