CVE-2026-23354 (GCVE-0-2026-23354)

Vulnerability from cvelistv5 – Published: 2026-03-25 10:27 – Updated: 2026-04-13 06:05
VLAI?
Title
x86/fred: Correct speculative safety in fred_extint()
Summary
In the Linux kernel, the following vulnerability has been resolved: x86/fred: Correct speculative safety in fred_extint() array_index_nospec() is no use if the result gets spilled to the stack, as it makes the believed safe-under-speculation value subject to memory predictions. For all practical purposes, this means array_index_nospec() must be used in the expression that accesses the array. As the code currently stands, it's the wrong side of irqentry_enter(), and 'index' is put into %ebp across the function call. Remove the index variable and reposition array_index_nospec(), so it's calculated immediately before the array access.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 14619d912b658ecd9573fb88400d3830a29cadcb , < 3bc5887b0a2b06d2d9c22f1f4f8500490b3ae643 (git)
Affected: 14619d912b658ecd9573fb88400d3830a29cadcb , < e58f1a9b0677de24dcfee0b21393446ec92ff120 (git)
Affected: 14619d912b658ecd9573fb88400d3830a29cadcb , < 92caa5274b99cb6729177232a029ce0dfa6c5f7b (git)
Affected: 14619d912b658ecd9573fb88400d3830a29cadcb , < aa280a08e7d8fae58557acc345b36b3dc329d595 (git)
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    Linux Linux Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.12.77 , ≤ 6.12.* (semver)
Unaffected: 6.18.17 , ≤ 6.18.* (semver)
Unaffected: 6.19.7 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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  • 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.
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