Critical severity · published Jul 25, 2026
CVE-2026-64355
bpf: Reject fragmented frames in devmap
9.8
CVSS
0.5%
EPSS
No
On KEV
Description
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 in dev_map_enqueue_clone().
Add the same restriction to the generic XDP clone path in
dev_map_redirect_clone(). Generic XDP represents fragmented packets as
nonlinear skbs, and rejecting them here keeps clone-based broadcast
support aligned between native and generic XDP.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
5.14 before 5.15.212; 5.16 before 6.1.178; 6.2 before 6.6.145; 6.7 before 6.12.96; 6.13 before 6.18.39; 6.19 before 7.1.4 · source: NVD
LI
Linux · Linux
e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before 47baddc856ae7e93a565dd9deeb797999b179466; e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before 07a4c11ee8ef4abcb39d922e9e410ae269671cdf; e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before bccbab36ff228e0825eb85d9b0f9b8434cd0a399; e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before c5b4f5efcb55c1af3fe44ff712d31b7fb098a831; e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before a9bb2d9c798cb62a4050a991c27b752770c33afe; e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before 51d07c12ca411e692c424ecdabf077f1e61a61be; +2 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64355
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-64355
Patch
https://git.kernel.org/stable/c/07a4c11ee8ef4abcb39d922e9e410ae269671cdf
Patch
https://git.kernel.org/stable/c/47baddc856ae7e93a565dd9deeb797999b179466
Patch
https://git.kernel.org/stable/c/51d07c12ca411e692c424ecdabf077f1e61a61be
Patch
https://git.kernel.org/stable/c/a9bb2d9c798cb62a4050a991c27b752770c33afe
Patch
https://git.kernel.org/stable/c/aa496720618f1a6054f1c870bf10b4f6c99bf656
Patch
https://git.kernel.org/stable/c/bccbab36ff228e0825eb85d9b0f9b8434cd0a399
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