Description
In the Linux kernel, the following vulnerability has been resolved:

net: devmem: prevent net-iov / page mixing

We should either have net_iov or page backed frags in a single skb,
otherwise it blows up down the stack. Don't allow mixing in
zerocopy_fill_skb_from_devmem().
Published: 2026-08-22
Score: n/a
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The kernel bug allows the mixing of net_iov and page‑backed fragments when building a socket buffer, which can cause a stack blow up. The resulting crash brings the system down, terminating kernel operations and rendering the host unavailable to legitimate workloads. This is a classic kernel memory misuse flaw, classified by the advisory as a local denial‑of‑service vulnerability.

Affected Systems

All Linux kernel implementations, since the issue resides in core networking code and no specific kernel release is mentioned in the advisory.

Risk and Exploitability

The CVSS score is not provided, and the EPSS score is unavailable, so the exact severity cannot be quantified. However, the report indicates the flaw results in a kernel panic when the improper mix occurs. Because the bug is triggered by kernel internals handling network data, it is generally considered a local exploit that could be invoked by processes with elevated privileges or by abusive traffic patterns. There is no current evidence that the vulnerability is actively exploited, and it is not listed in the CISA KEV catalog.

Generated by OpenCVE AI on August 22, 2026 at 18:39 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the kernel patch that prohibits mixing net_iov and page‑backed fragments in zerocopy_fill_skb_from_devmem.
  • If a vendor schedule does not yet include the patch, restrict externally sourced zero‑copy network traffic or disable zero‑copy features until the fix is available.
  • If instant patching is not possible, isolate the affected Ethernet interfaces and block external zero‑copy traffic until the fix is deployed to prevent accidental exploitation.

Generated by OpenCVE AI on August 22, 2026 at 18:39 UTC.

Tracking

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Advisories

No advisories yet.

History

Sat, 22 Aug 2026 19:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-119

Sat, 22 Aug 2026 15:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: net: devmem: prevent net-iov / page mixing We should either have net_iov or page backed frags in a single skb, otherwise it blows up down the stack. Don't allow mixing in zerocopy_fill_skb_from_devmem().
Title net: devmem: prevent net-iov / page mixing
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-22T15:32:09.405Z

Reserved: 2026-08-15T05:44:03.921Z

Link: CVE-2026-74627

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-22T16:16:35.630

Modified: 2026-08-22T16:16:35.630

Link: CVE-2026-74627

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-22T18:45:04Z

Weaknesses
  • CWE-119

    Improper Restriction of Operations within the Bounds of a Memory Buffer