Security readout for executives and security teams
Plain-English summary
A Linux vmxnet3 network-driver flaw can mishandle packet-buffer length information during XDP processing, leaving insufficient reserved space. The supplied CVSS score is 7.5 because network input may disrupt system availability without privileges or user interaction. The evidence does not indicate confidentiality or integrity impact.
Executive priority
Treat this as a high-priority availability issue after confirming vmxnet3 and XDP exposure. Accelerate remediation for critical network services, but avoid assuming every Linux host is vulnerable. There is no supplied evidence of active exploitation, data theft, or data modification.
Technical view
For a non-data-ring packet, vmxnet3 used rcd->len instead of rbi->len. This could produce an XDP “missing reserved tailroom” driver warning in the receive and redirect path. The supplied vector is AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Stable-kernel commits are provided as resolutions.
Likely exposure
Prioritize Linux systems running affected kernel revisions where the vmxnet3 driver and XDP receive processing are in use. The bundle lists affected 6.6-and-later version data, but its normalized version list does not clearly express exact ranges. Confirm exposure against distribution or kernel-vendor advisories.
Exploitation context
The supplied record is not in CISA KEV, and no cited source establishes active exploitation or a public exploit. Network reachability and low attack complexity increase theoretical risk, but the bundle does not document a demonstrated attack, trigger packet, or real-world incident.
Researcher notes
The evidence shows a buffer-length accounting defect and an XDP warning trace, but supplies no CWE, reproducer, root-cause depth, or exploitation demonstration. Four stable-kernel commits are referenced. Exact affected-to-fixed range interpretation is incomplete in the normalized bundle, so validate commit inclusion through authoritative kernel or distribution metadata.
Mitigation direction
- Update to a vendor-supported kernel containing the applicable stable vmxnet3 fix.
- Consult the Linux or distribution advisory to map the fix to your exact kernel build.
- Prioritize internet-facing or availability-critical systems confirmed to use vmxnet3 with XDP.
- If updating is delayed, review vendor guidance for supported configuration-level mitigations.
Validation and detection
- Record each system’s kernel build and compare it with official vendor guidance.
- Verify whether the vmxnet3 driver is present and active on each candidate system.
- Determine whether XDP processing is configured on vmxnet3 interfaces.
- Search kernel logs for “missing reserved tailroom,” XDP_WARN, and vmxnet3 receive-path warnings.
- After updating, confirm the running kernel includes the vendor-designated fix.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2024-27026 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6LinuxVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/aba8659caf88017507419feea06069f529329ea6CVE reference, Linux
- https://git.kernel.org/stable/c/7c8505ecc2d15473d679b8e06335434b84fffe86CVE reference, Linux
- https://git.kernel.org/stable/c/91d017d19d5a9ad153e2dc23ed3c0e2e79ef5262CVE reference, Linux
- https://git.kernel.org/stable/c/e127ce7699c1e05279ee5ee61f00893e7bfa9671CVE reference, Linux
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.