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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-90210

bpf: Fix UAF in bpf_trampoline_multi_attach_free on update failure

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • aef4dfa790b22d8052cfb78044eadbe03c876c39 to < 65c3939656fd7848e9274faa07c26748b5bf049caffected
  • aef4dfa790b22d8052cfb78044eadbe03c876c39 to < 0253073fb7d79a2dd2eae9581ea16db2aef395a6affected

Linux Linux

Default version status: affected

  • 7.2affected
  • 0 to < 7.2unaffected
  • 7.2.6 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References