CVE-2026-64507 (GCVE-0-2026-64507)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:52 – Updated: 2026-08-19 16:28
VLAI
Title
x86/bugs: Enable IBPB flush on BPF JIT allocation
Summary
In the Linux kernel, the following vulnerability has been resolved: x86/bugs: Enable IBPB flush on BPF JIT allocation Enable hardening against JIT spraying when Spectre-v2 mitigations are in use. Specifically, issue an IBPB flush on BPF JIT memory reuse. Skip enabling the IBPB flush if the BPF dispatcher is already using a retpoline sequence. This hardening applies only when BPF-JIT is in use. Guard the enabling under CONFIG_BPF_JIT so that bugs.c still builds with CONFIG_BPF_JIT=n.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 57631054fae6dcc9c892ae6310b58bbb6f6e5048 , < 25dbcd31781e2bc3cd63d873af1fcd06f863a126 (git)
Affected: 57631054fae6dcc9c892ae6310b58bbb6f6e5048 , < cb27f3bf915cc0f20fc0c48da9059304e39ebd35 (git)
Affected: 57631054fae6dcc9c892ae6310b58bbb6f6e5048 , < 9354248fc1c33a844ca1872761f6668b393e8c37 (git)
Affected: 57631054fae6dcc9c892ae6310b58bbb6f6e5048 , < 8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1 (git)
Affected: 57631054fae6dcc9c892ae6310b58bbb6f6e5048 , < 52440e15d9628f8f239373c0f2e5e8f92feea2df (git)
Affected: 57631054fae6dcc9c892ae6310b58bbb6f6e5048 , < a3af84b0fa00ead01fcd0e28b5d773ff25990a0d (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.39 , ≤ 6.18.* (semver)
Unaffected: 7.1.4 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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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.


Detection rules are retrieved from Rulezet.


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