cbcvebase.
CVE-2026-23140
published 2026-02-14

CVE-2026-23140: In the Linux kernel, the following vulnerability has been resolved: bpf, test_run: Subtract size of xdp_frame from allowed metadata size The xdp_frame…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.12%
2.3th percentile
In the Linux kernel, the following vulnerability has been resolved: bpf, test_run: Subtract size of xdp_frame from allowed metadata size The xdp_frame structure takes up part of the XDP frame headroom, limiting the size of the metadata. However, in bpf_test_run, we don't take this into account, which makes it possible for userspace to supply a metadata size that is too large (taking up the entire headroom). If userspace supplies such a large metadata size in live packet mode, the xdp_update_frame_from_buff() call in xdp_test_run_init_page() call will fail, after which packet transmission proceeds with an uninitialised frame structure, leading to the usual Bad Stuff. The commit in the Fixes tag fixed a related bug where the second check in xdp_update_frame_from_buff() could fail, but did not add any additional constraints on the metadata size. Complete the fix by adding an additional check on the metadata size. Reorder the checks slightly to make the logic clearer and add a comment.

Affected

45 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.162-1 (bookworm)linux 6.1.162-1 (bookworm)
linuxlinux
linuxlinux>= b6f1f780b3932ae497ed85e79bc8a1e513883624 < e7440935063949d6f2c10f7328d960d0ff4bce90e7440935063949d6f2c10f7328d960d0ff4bce90
linuxlinux>= b6f1f780b3932ae497ed85e79bc8a1e513883624 < 7c81ad5e580bd8441f8a521a8d34824ce6582ae57c81ad5e580bd8441f8a521a8d34824ce6582ae5
linuxlinux>= b6f1f780b3932ae497ed85e79bc8a1e513883624 < 6447e697cfa8a43a8e491cb81bcc390d0f28f8ba6447e697cfa8a43a8e491cb81bcc390d0f28f8ba
linuxlinux>= b6f1f780b3932ae497ed85e79bc8a1e513883624 < 31e37f44b60679d90b9f999c91371b15291be8e031e37f44b60679d90b9f999c91371b15291be8e0
linuxlinux>= b6f1f780b3932ae497ed85e79bc8a1e513883624 < e558cca217790286e799a8baacd1610bda31b261e558cca217790286e799a8baacd1610bda31b261
linuxlinux_kernel
linuxlinux_kernel>= 0 < 6.1.162-16.1.162-1
linuxlinux_kernel>= 0 < 6.12.69-16.12.69-1
linuxlinux_kernel>= 0 < 6.18.8-16.18.8-1
linuxlinux_kernel>= 5.18 < 6.1.1616.1.161
linuxlinux_kernel>= 6.13 < 6.18.66.18.6
linuxlinux_kernel>= 6.2 < 6.6.1216.6.121
linuxlinux_kernel>= 6.7 < 6.12.666.12.66
ubuntulinux
ubuntulinux-aws
ubuntulinux-aws-fips
ubuntulinux-azure
ubuntulinux-azure-6.17
ubuntulinux-azure-6.8
ubuntulinux-azure-fde-6.17
ubuntulinux-azure-fips
ubuntulinux-fips
ubuntulinux-gcp

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_ubuntu7.8HIGH
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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