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CVE-2026-89581 bpf, x86: Fix per-CPU address resolution into an extended register

🗓️ 11 Sep 2026 19:44:47Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 41 Views

Linux kernel BPF x86 REX bug misdirects per-CPU address to wrong register, causing kernel panic.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "arch/x86/net/bpf_jit_comp.c"
    ],
    "versions": [
      {
        "version": "7bdbf7446305cb65c510c16d57cde82bc76b234a",
        "lessThan": "638bc3aada8ecdece184d5c15b100d489c9cccd7",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7bdbf7446305cb65c510c16d57cde82bc76b234a",
        "lessThan": "6886642414f59f928728802dc2c972a9859e6310",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7bdbf7446305cb65c510c16d57cde82bc76b234a",
        "lessThan": "6a19b18d458881bf3269a357cc6dc6db5eef4369",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7bdbf7446305cb65c510c16d57cde82bc76b234a",
        "lessThan": "5bbbce02e500d47d8e259a45be5a7be9741d0533",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "arch/x86/net/bpf_jit_comp.c"
    ],
    "versions": [
      {
        "version": "6.10",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.10",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.109",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.50",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.4",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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