CVE-2026-93270 (GCVE-0-2026-93270)

Vulnerability from cvelistv5 – Published: 2026-09-24 15:52 – Updated: 2026-09-24 15:52
VLAI
Title
bpf: Disallow interpreter fallback for BPF_ADDR_PERCPU insn
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Disallow interpreter fallback for BPF_ADDR_PERCPU insn The BPF_MOV64_PERCPU_REG insn requires JIT to emit native code to for 'dst_reg = src_reg + <percpu_base_off>'. However, the interpreter ignores the 'off' at its ALU64_MOV_X label. The 'off' indicates the insn is BPF_MOV64_PERCPU_REG insn. Then, when the interpreter loads memory from the register, it will hit a page fault. [ 2.545572] BUG: unable to handle page fault for address: ffffffffacaaf034 [ 2.546485] #PF: supervisor read access in kernel mode [ 2.547167] #PF: error_code(0x0000) - not-present page [ 2.547850] PGD 134e63067 P4D 134e63067 PUD 134e64063 PMD 10021c063 PTE 800ffffeca550062 [ 2.548912] Oops: Oops: 0000 [#1] SMP PTI Set jit_required as true in order to disallow interpreter fallback in core.c::__bpf_prog_select_runtime(), if any BPF_ADDR_PERCPU insn is patched to the prog. BTW, rename the helper bpf_map_supports_cpu_flags() to bpf_map_is_percpu_map().
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 7bdbf7446305cb65c510c16d57cde82bc76b234a , < 57cf929a33cb76be3f24886073ae820b4c496914 (git)
Affected: 7bdbf7446305cb65c510c16d57cde82bc76b234a , < 7a0855e73757ee9cf25ba635a1c735018ecba742 (git)
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Linux Linux Affected: 6.10
Unaffected: 0 , < 6.10 (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/linux/bpf.h",
            "kernel/bpf/fixups.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "57cf929a33cb76be3f24886073ae820b4c496914",
              "status": "affected",
              "version": "7bdbf7446305cb65c510c16d57cde82bc76b234a",
              "versionType": "git"
            },
            {
              "lessThan": "7a0855e73757ee9cf25ba635a1c735018ecba742",
              "status": "affected",
              "version": "7bdbf7446305cb65c510c16d57cde82bc76b234a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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            "kernel/bpf/fixups.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Disallow interpreter fallback for BPF_ADDR_PERCPU insn\n\nThe BPF_MOV64_PERCPU_REG insn requires JIT to emit native code to for\n\u0027dst_reg = src_reg + \u003cpercpu_base_off\u003e\u0027.\n\nHowever, the interpreter ignores the \u0027off\u0027 at its ALU64_MOV_X label.\nThe \u0027off\u0027 indicates the insn is BPF_MOV64_PERCPU_REG insn. Then, when\nthe interpreter loads memory from the register, it will hit a page\nfault.\n\n[    2.545572] BUG: unable to handle page fault for address: ffffffffacaaf034\n[    2.546485] #PF: supervisor read access in kernel mode\n[    2.547167] #PF: error_code(0x0000) - not-present page\n[    2.547850] PGD 134e63067 P4D 134e63067 PUD 134e64063 PMD 10021c063 PTE 800ffffeca550062\n[    2.548912] Oops: Oops: 0000 [#1] SMP PTI\n\nSet jit_required as true in order to disallow interpreter fallback in\ncore.c::__bpf_prog_select_runtime(), if any BPF_ADDR_PERCPU insn is\npatched to the prog.\n\nBTW, rename the helper bpf_map_supports_cpu_flags() to\nbpf_map_is_percpu_map()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-24T15:52:09.868Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/57cf929a33cb76be3f24886073ae820b4c496914"
        },
        {
          "url": "https://git.kernel.org/stable/c/7a0855e73757ee9cf25ba635a1c735018ecba742"
        }
      ],
      "title": "bpf: Disallow interpreter fallback for BPF_ADDR_PERCPU insn",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93270",
    "datePublished": "2026-09-24T15:52:09.868Z",
    "dateReserved": "2026-09-17T16:02:15.097Z",
    "dateUpdated": "2026-09-24T15:52:09.868Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "include/linux/bpf.h",
                  "kernel/bpf/fixups.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "57cf929a33cb76be3f24886073ae820b4c496914",
                    "status": "affected",
                    "version": "7bdbf7446305cb65c510c16d57cde82bc76b234a",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "7a0855e73757ee9cf25ba635a1c735018ecba742",
                    "status": "affected",
                    "version": "7bdbf7446305cb65c510c16d57cde82bc76b234a",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "include/linux/bpf.h",
                  "kernel/bpf/fixups.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "6.10"
                  },
                  {
                    "lessThan": "6.10",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.2.*",
                    "status": "unaffected",
                    "version": "7.2.6",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.3-rc1",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Disallow interpreter fallback for BPF_ADDR_PERCPU insn\n\nThe BPF_MOV64_PERCPU_REG insn requires JIT to emit native code to for\n\u0027dst_reg = src_reg + \u003cpercpu_base_off\u003e\u0027.\n\nHowever, the interpreter ignores the \u0027off\u0027 at its ALU64_MOV_X label.\nThe \u0027off\u0027 indicates the insn is BPF_MOV64_PERCPU_REG insn. Then, when\nthe interpreter loads memory from the register, it will hit a page\nfault.\n\n[    2.545572] BUG: unable to handle page fault for address: ffffffffacaaf034\n[    2.546485] #PF: supervisor read access in kernel mode\n[    2.547167] #PF: error_code(0x0000) - not-present page\n[    2.547850] PGD 134e63067 P4D 134e63067 PUD 134e64063 PMD 10021c063 PTE 800ffffeca550062\n[    2.548912] Oops: Oops: 0000 [#1] SMP PTI\n\nSet jit_required as true in order to disallow interpreter fallback in\ncore.c::__bpf_prog_select_runtime(), if any BPF_ADDR_PERCPU insn is\npatched to the prog.\n\nBTW, rename the helper bpf_map_supports_cpu_flags() to\nbpf_map_is_percpu_map()."
          }
        ],
        "id": "CVE-2026-93270",
        "lastModified": "2026-09-24T16:17:24.020",
        "metrics": {},
        "published": "2026-09-24T16:17:24.020",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/57cf929a33cb76be3f24886073ae820b4c496914"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/7a0855e73757ee9cf25ba635a1c735018ecba742"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-09-24T23:48:40Z",
      "cve": "CVE-2026-93270",
      "id": "CVE-2026-93270",
      "initial_release_date": "2026-09-24T23:48:40Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-93270",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-93270.json",
      "version": "2"
    }
  }
}



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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.

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.