CVE-2026-23156
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.12%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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().
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.12% probability · 2th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/3960f1754664661a970dc9ebbab44ff93a0b4c42Patch
- https://git.kernel.org/stable/c/4b22ec1685ce1fc0d862dcda3225d852fb107995Patch
- https://git.kernel.org/stable/c/510a16f1c5c1690b33504052bc13fbc2772c23f8Patch
- https://git.kernel.org/stable/c/89b8ca709eeeabcc11ebba64806677873a2787a8Patch
- https://git.kernel.org/stable/c/e4e15a0a4403c96d9898d8398f0640421df9cb16Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.