High 7.8Published Sep 17, 2026

CVE-2026-90210bpf: Fix UAF in bpf_trampoline_multi_attach_free on update failure

Updated under an hour ago (Oct 26, 2026, 9:00 PM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix UAF in bpf_trampoline_multi_attach_free on update failure When bpf_trampoline_update() fails before modify_fentry_multi()/ unregister_fentry_multi() is called, cur_image is unchanged (cur_image == old_image) and ftrace still calls into it. Freeing old_image in that case causes a UAF. Only free old_image when it differs from cur_image.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from aef4dfa790b22d8052cfb78044eadbe03c876c39 before 65c3939656fd7848e9274faa07c26748b5bf049c; from aef4dfa790b22d8052cfb78044eadbe03c876c39 before 0253073fb7d79a2dd2eae9581ea16db2aef395a6	CNA record

References

References

https://git.kernel.org/stable/c/65c3939656fd7848e9274faa07c26748b5bf049c
https://git.kernel.org/stable/c/0253073fb7d79a2dd2eae9581ea16db2aef395a6

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.