vsock/virtio: Validate length in packet header before skb_put()
Summary
| CVE | CVE-2025-39718 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-09-05 18:15:49 UTC |
| Updated | 2026-05-12 13:17:07 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: Validate length in packet header before skb_put() When receiving a vsock packet in the guest, only the virtqueue buffer size is validated prior to virtio_vsock_skb_rx_put(). Unfortunately, virtio_vsock_skb_rx_put() uses the length from the packet header as the length argument to skb_put(), potentially resulting in SKB overflow if the host has gone wonky. Validate the length as advertised by the packet header before calling virtio_vsock_skb_rx_put(). |
Risk And Classification
Primary CVSS: v3.1 5.5 MEDIUM from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Problem Types: CWE-787
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected baddcc2c71572968cdaeee1c4ab3dc0ad90fa765 969b06bd8b7560efb100a34227619e7d318fbe05 git | Not specified |
| CNA | Linux | Linux | affected 71dc9ec9ac7d3eee785cdc986c3daeb821381e20 ee438c492b2e0705d819ac0e25d04fae758d8f8f git | Not specified |
| CNA | Linux | Linux | affected 71dc9ec9ac7d3eee785cdc986c3daeb821381e20 faf332a10372390ce65d0b803888f4b25a388335 git | Not specified |
| CNA | Linux | Linux | affected 71dc9ec9ac7d3eee785cdc986c3daeb821381e20 676f03760ca1d69c2470cef36c44dc152494b47c git | Not specified |
| CNA | Linux | Linux | affected 71dc9ec9ac7d3eee785cdc986c3daeb821381e20 0dab92484474587b82e8e0455839eaf5ac7bf894 git | Not specified |
| CNA | Linux | Linux | affected 6.3 | Not specified |
| CNA | Linux | Linux | unaffected 6.3 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.149 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.103 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.44 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.16.4 6.16.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.17 * original_commit_for_fix | Not specified |
| ADP | Siemens | SIMATIC CN 4100 | affected V5.0 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| lists.debian.org/debian-lts-announce/2025/10/msg00008.html | af854a3a-2127-422b-91ae-364da2661108 | lists.debian.org | Third Party Advisory |
| git.kernel.org/stable/c/faf332a10372390ce65d0b803888f4b25a388335 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| cert-portal.siemens.com/productcert/html/ssa-032379.html | 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e | cert-portal.siemens.com | |
| git.kernel.org/stable/c/676f03760ca1d69c2470cef36c44dc152494b47c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/ee438c492b2e0705d819ac0e25d04fae758d8f8f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/0dab92484474587b82e8e0455839eaf5ac7bf894 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/969b06bd8b7560efb100a34227619e7d318fbe05 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.