CVE-2023-52996 (GCVE-0-2023-52996)

Vulnerability from cvelistv5 – Published: 2025-03-27 16:43 – Updated: 2026-05-11 19:36
VLAI
Title
ipv4: prevent potential spectre v1 gadget in fib_metrics_match()
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv4: prevent potential spectre v1 gadget in fib_metrics_match() if (!type) continue; if (type > RTAX_MAX) return false; ... fi_val = fi->fib_metrics->metrics[type - 1]; @type being used as an array index, we need to prevent cpu speculation or risk leaking kernel memory content.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8 , < 8f0eb24f1a7a60ce635f0d757a46f1a37a4d467d (git)
Affected: 5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8 , < 7f9828fb1f688210e681268490576f0ca65c322a (git)
Affected: 5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8 , < ca3cf947760de050d558293002ad3e7f4b8745d2 (git)
Affected: 5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8 , < f9753ebd61be2d957b5504cbd3fd719674f05b7a (git)
Affected: 5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8 , < 5e9398a26a92fc402d82ce1f97cc67d832527da0 (git)
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Linux Linux Affected: 4.14
Unaffected: 0 , < 4.14 (semver)
Unaffected: 5.4.231 , ≤ 5.4.* (semver)
Unaffected: 5.10.166 , ≤ 5.10.* (semver)
Unaffected: 5.15.91 , ≤ 5.15.* (semver)
Unaffected: 6.1.9 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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{
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            "net/ipv4/fib_semantics.c"
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  }
}


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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.



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