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CVE-2026-64507

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:520e6ae2c8a00067d86b95f872e645264c8ea17616aab12c78936aaacb2035bd
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/x86/include/asm/nospec-branch.h","arch/x86/kernel/cpu/bugs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"cb27f3bf915cc0f20fc0c48da9059304e39ebd35","status":"affected","version":"57631054fae6dcc9c892ae6310b58bbb6f6e5048","versionType":"git"},{"lessThan":"9354248fc1c33a844ca1872761f6668b393e8c37","status":"affected","version":"57631054fae6dcc9c892ae6310b58bbb6f6e5048","versionType":"git"},{"lessThan":"8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1","status":"a…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7bb311a05718ef0f526029ac49b49c11bb142a395a423271d5d195f15e167352 · sha256:b15190cae2092fb3… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["arch/x86/include/asm/nospec-branch.h","arch/x86/kernel/cpu/bugs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.18"},{"lessThan":"5.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7bb311a05718ef0f526029ac49b49c11bb142a395a423271d5d195f15e167352 · sha256:b15190cae2092fb3… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/x86/include/asm/nospec-branch.h","arch/x86/kernel/cpu/bugs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"cb27f3bf915cc0f20fc0c48da9059304e39ebd35","status":"affected","version":"57631054fae6dcc9c892ae6310b58bbb6f6e5048","versionType":"git"},{"lessThan":"9354248fc1c33a844ca1872761f6668b393e8c37","status":"affected","version":"57631054fae6dcc9c892ae6310b58bbb6f6e5048","versionType":"git"},{"lessThan":"8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1","status":"a…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7bb311a05718ef0f526029ac49b49c11bb142a395a423271d5d195f15e167352 · sha256:b15190cae2092fb3… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["arch/x86/include/asm/nospec-branch.h","arch/x86/kernel/cpu/bugs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.18"},{"lessThan":"5.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7bb311a05718ef0f526029ac49b49c11bb142a395a423271d5d195f15e167352 · sha256:b15190cae2092fb3… · /containers/cna/affected/1

Source references

5 source assertions
{"url":"https://git.kernel.org/stable/c/52440e15d9628f8f239373c0f2e5e8f92feea2df"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7bb311a05718ef0f526029ac49b49c11bb142a395a423271d5d195f15e167352 · sha256:b15190cae2092fb3… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7bb311a05718ef0f526029ac49b49c11bb142a395a423271d5d195f15e167352 · sha256:b15190cae2092fb3… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/9354248fc1c33a844ca1872761f6668b393e8c37"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7bb311a05718ef0f526029ac49b49c11bb142a395a423271d5d195f15e167352 · sha256:b15190cae2092fb3… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/a3af84b0fa00ead01fcd0e28b5d773ff25990a0d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7bb311a05718ef0f526029ac49b49c11bb142a395a423271d5d195f15e167352 · sha256:b15190cae2092fb3… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/cb27f3bf915cc0f20fc0c48da9059304e39ebd35"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7bb311a05718ef0f526029ac49b49c11bb142a395a423271d5d195f15e167352 · sha256:b15190cae2092fb3… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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