- 5.5MediumCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 15 days later
· 15 days later
Published
- 5 months later
· 5 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 98% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 4b0bf10eb077cb43c09746251ef3608d62c45667 – < 06747f52ab157591cec7e5623a759473b66ef6f6
- affected 4b0bf10eb077cb43c09746251ef3608d62c45667 – < 52da6a74ca3de0fcda60301096b71534b3b18641
- affected 4b0bf10eb077cb43c09746251ef3608d62c45667 – < 378b131a25bd1a5ee27ca199fe486c299d5350c5
- affected 4b0bf10eb077cb43c09746251ef3608d62c45667 – < 3a3e3d90cbc79600544536723911657730759af3
- affected 6.7
- unaffected < 6.7
- unaffected 6.12.90 – ≤ 6.12.*
- unaffected 6.18.32 – ≤ 6.18.*
- unaffected 7.0.9 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References4
- https://git.kernel.org/stable/c/06747f52ab157591cec7e5623a759473b66ef6f6 (opens in a new tab)
- https://git.kernel.org/stable/c/52da6a74ca3de0fcda60301096b71534b3b18641 (opens in a new tab)
- https://git.kernel.org/stable/c/378b131a25bd1a5ee27ca199fe486c299d5350c5 (opens in a new tab)
- https://git.kernel.org/stable/c/3a3e3d90cbc79600544536723911657730759af3 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-32834 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-46207)Record last updated .