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Review reviewCritical

CVE-2026-64355

Linux

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject fragmented frames in devmap Devmap broadcast redirects clone the packet for all but the last destination. For native XDP, that clone path copies only the linear xdp_frame data, while fragmented frames keep skb_shared_info in tailroom outside the linear area. Cloning such a frame leaves XDP_FLAGS_HAS_FRAGS set but without valid frag metadata, and the later free path can interpret uninitialized tail data as skb_shared_info, leading to an out-of-bounds access during frame return. Reject fragmented native XDP frames...

CVSS
9.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 9.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject fragmented frames in devmap Devmap broadcast redirects clone the packet for all but the last destination. For native XDP, that clone path copies only the linear xdp_frame data, while fragmented frames keep skb_shared_info in tailroom outside the linear area. Cloning such a frame leaves XDP_FLAGS_HAS_FRAGS set but without valid frag metadata, and the later free path can interpret uninitialized tail data as skb_shared_info, leading to an out-of-bounds access during frame return. Reject fragmented native XDP frames...

Affected product and versions

Product
Linux
Affected versions
>= e624d4ed4aa8cc3c69d1359b0aaea539203ed266 < 47baddc856ae7e93a565dd9deeb797999b179466, >= e624d4ed4aa8cc3c69d1359b0aaea539203ed266 < 07a4c11ee8ef4abcb39d922e9e410ae269671cdf, >= e624d4ed4aa8cc3c69d1359b0aaea539203ed266 < bccbab36ff228e0825eb85d9b0f9b8434cd0a399, >= e624d4ed4aa8cc3c69d1359b0aaea539203ed266 < c5b4f5efcb55c1af3fe44ff712d31b7fb098a831, >= e624d4ed4aa8cc3c69d1359b0aaea539203ed266 < a9bb2d9c798cb62a4050a991c27b752770c33afe, >= e624d4ed4aa8cc3c69d1359b0aaea539203ed266 < 51d07c12ca411e692c424ecdabf077f1e61a61be, >= e624d4ed4aa8cc3c69d1359b0aaea539203ed266 < aa496720618f1a6054f1c870bf10b4f6c99bf656, >= 5.14
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
Not available