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CVE-2026-23156 (GCVE-0-2026-23156)

Vulnerability from cvelistv5 – Published: 2026-02-14 16:01 – Updated: 2026-05-11 22:01
VLAI
Title
efivarfs: fix error propagation in efivar_entry_get()
Summary
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().
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2d82e6227ea189c0589e7383a36616ac2a2d248c , < 3960f1754664661a970dc9ebbab44ff93a0b4c42 (git)
Affected: 2d82e6227ea189c0589e7383a36616ac2a2d248c , < 510a16f1c5c1690b33504052bc13fbc2772c23f8 (git)
Affected: 2d82e6227ea189c0589e7383a36616ac2a2d248c , < 89b8ca709eeeabcc11ebba64806677873a2787a8 (git)
Affected: 2d82e6227ea189c0589e7383a36616ac2a2d248c , < e4e15a0a4403c96d9898d8398f0640421df9cb16 (git)
Affected: 2d82e6227ea189c0589e7383a36616ac2a2d248c , < 4b22ec1685ce1fc0d862dcda3225d852fb107995 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.162 , ≤ 6.1.* (semver)
Unaffected: 6.6.123 , ≤ 6.6.* (semver)
Unaffected: 6.12.69 , ≤ 6.12.* (semver)
Unaffected: 6.18.9 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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    "redhat_vex": {
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      "current_release_date": "2026-06-28T07:19:12+00:00",
      "cve": "CVE-2026-23156",
      "id": "CVE-2026-23156",
      "initial_release_date": "2026-02-14T00:00:00+00:00",
      "product_status:fixed": "616",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Information disclosure in efivarfs via incorrect error propagation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23156.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-24T02:39:05Z",
      "cve": "CVE-2026-23156",
      "id": "CVE-2026-23156",
      "initial_release_date": "2026-02-16T00:26:03Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "489",
      "product_status:known_not_affected": "184",
      "product_status:recommended": "337",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-23156",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-23156.json",
      "version": "27"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


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