CVE-2026-23140None▾ SunlitIn 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…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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.
Linux >= b6f1f780b3932ae497ed85e79bc8a1e513883624 < e7440935063949d6f2c10f7328d960d0ff4bce90Linux >= b6f1f780b3932ae497ed85e79bc8a1e513883624 < 7c81ad5e580bd8441f8a521a8d34824ce6582ae5Linux >= b6f1f780b3932ae497ed85e79bc8a1e513883624 < 6447e697cfa8a43a8e491cb81bcc390d0f28f8baLinux >= b6f1f780b3932ae497ed85e79bc8a1e513883624 < 31e37f44b60679d90b9f999c91371b15291be8e0Linux >= b6f1f780b3932ae497ed85e79bc8a1e513883624 < e558cca217790286e799a8baacd1610bda31b261Linux 5.18Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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