CVE-2026-23156

efivarfs: fix error propagation in efivar_entry_get()

Published: 2/14/2026 Last updated: 5/11/2026 Reserved: 1/13/2026

In the Linux kernel, the following vulnerability has been resolved: efivarfs: fix error propagation in efivar_entry_get() efivar_entry_get() always returns success even if the underlying __efivar_entry_get() fails, masking errors. This may result in uninitialized heap memory being copied to userspace in the efivarfs_file_read() path. Fix it by returning the error from __efivar_entry_get().

CNA assigner: Linux (416baaa9-dc9f-4396-8d5f-8c081fb06d67) Requested by: n/a

Opam packages affected (29)

albatross cdrom conf-bpftool conf-libbpf conf-linux-libc-dev core core_unix hvsock mirage-block-unix mm ocaml-probes ortools_solvers orun rawlink rawlink-eio rawlink-lwt restricted shell solo5 solo5-bindings-hvt solo5-bindings-spt solo5-cross-aarch64 solo5-kernel-ukvm tracy-client tuntap uring vhd-format vhd-format-lwt xapi-stdext-unix

Products affected (4)

Product	Vendor	Version
Linux	Linux	9
Linux	Linux	9.0.2
Linux	Linux	5.4.1
Linux	Linux	v5.2.2, v6.0.0, v6.0.1, v6.1.0 of MapR without MFS-2025 patch

CVE-2026-23156

efivarfs: fix error propagation in efivar_entry_get()

Opam packages affected (29)

Products affected (4)

References (10)