CVE-2026-46207 (GCVE-0-2026-46207)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:40 – Updated: 2026-06-14 18:02
VLAI
Title
vsock/virtio: fix empty payload in tap skb for non-linear buffers
Summary
In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fix empty payload in tap skb for non-linear buffers For non-linear skbs, virtio_transport_build_skb() goes through virtio_transport_copy_nonlinear_skb() to copy the original payload in the new skb to be delivered to the vsockmon tap device. This manually initializes an iov_iter but does not set iov_iter.count. Since the iov_iter is zero-initialized, the copy length is zero and no payload is actually copied to the monitor interface, leaving data un-initialized. Fix this by removing the linear vs non-linear split and using skb_copy_datagram_iter() with iov_iter_kvec() for all cases, as vhost-vsock already does. This handles both linear and non-linear skbs, properly initializes the iov_iter, and removes the now unused virtio_transport_copy_nonlinear_skb(). While touching this code, let's also check the return value of skb_copy_datagram_iter(), even though it's unlikely to fail.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6650 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 4b0bf10eb077cb43c09746251ef3608d62c45667 , < 06747f52ab157591cec7e5623a759473b66ef6f6 (git)
Affected: 4b0bf10eb077cb43c09746251ef3608d62c45667 , < 52da6a74ca3de0fcda60301096b71534b3b18641 (git)
Affected: 4b0bf10eb077cb43c09746251ef3608d62c45667 , < 378b131a25bd1a5ee27ca199fe486c299d5350c5 (git)
Affected: 4b0bf10eb077cb43c09746251ef3608d62c45667 , < 3a3e3d90cbc79600544536723911657730759af3 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.12.90 , ≤ 6.12.* (semver)
Unaffected: 6.18.32 , ≤ 6.18.* (semver)
Unaffected: 7.0.9 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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      "title": "SUSE CVE CVE-2026-46207",
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      "version": "16"
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}



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