powerpc64/bpf: Limit 'ldbrx' to processors compliant with ISA v2.06

{
  "id": "d00aa5959975f4ddc32a1c016c89854fffd82bb8847c60e82f694119e6ff4bc5",
  "url": "https://osv.dev/vulnerability/CVE-2022-48755",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "powerpc64/bpf: Limit 'ldbrx' to processors compliant with ISA v2.06",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: powerpc64/bpf: Limit 'ldbrx' to processors compliant with ISA v2.06 Johan reported the below crash with test_bpf on ppc64 e5500: test_bpf: #296 ALU_END_FROM_LE 64: 0x0123456789abcdef -> 0x67452301 jited:1 Oops: Exception in kernel mode, sig: 4 [#1] BE PAGE_SIZE=4K SMP NR_CPUS=24 QEMU e500 Modules linked in: test_bpf(+) CPU: 0 PID: 76 Comm: insmod Not tainted 5.14.0-03771-g98c2059e008a-dirty #1 NIP: 8000000000061c3c LR: 80000000006dea64 CTR: 8000000000061c18 REGS: c0000000032d3420 TRAP: 0700 Not tainted (5.14.0-03771-g98c2059e008a-dirty) MSR: 0000000080089000 CR: 88002822 XER: 20000000 IRQMASK: 0 <...> NIP [8000000000061c3c] 0x8000000000061c3c LR [80000000006dea64] .__run_one+0x104/0x17c [test_bpf] Call Trace: .__run_one+0x60/0x17c [test_bpf] (unreliable) .test_bpf_init+0x6a8/0xdc8 [test_bpf] .do_one_initcall+0x6c/0x28c .do_init_module+0x68/0x28c .load_module+0x2460/0x2abc .__do_sys_init_module+0x120/0x18c .system_call_exception+0x110/0x1b8 system_call_common+0xf0/0x210 --- interrupt: c00 at 0x101d0acc <...> ---[ end trace 47b2bf19090bb3d0 ]--- Illegal instruction The illegal instruction turned out to be 'ldbrx' emitted for BPF_FROM_[L|B]E, which was only introduced in ISA v2.06. Guard use of the same and implement an alternative approach for older processors.",
    "evidence": "osv:CVE-2022-48755",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.96",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.19",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.16.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-48755",
      "aliases": [
        "CVE-2022-48755"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "156d0e290e969caba25f1851c52417c14d141b24"
                },
                {
                  "fixed": "129c71829d7f46423d95c19e8d87ce956d4c6e1c"
                },
                {
                  "fixed": "3bfbc00587dc883eaed383558ae512a351c2cd09"
                },
                {
                  "fixed": "aaccfeeee1630b155e8ff0d6c449d3de1ef86e73"
                },
                {
                  "fixed": "3f5f766d5f7f95a69a630da3544a1a0cee1cdddf"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48755.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.8.0"
                },
                {
                  "fixed": "5.10.96"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.19"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "5.16.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48755.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.860952562Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/129c71829d7f46423d95c19e8d87ce956d4c6e1c",
        "https://git.kernel.org/stable/c/3bfbc00587dc883eaed383558ae512a351c2cd09",
        "https://git.kernel.org/stable/c/3f5f766d5f7f95a69a630da3544a1a0cee1cdddf",
        "https://git.kernel.org/stable/c/aaccfeeee1630b155e8ff0d6c449d3de1ef86e73",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48755.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-48755",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48755.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-48755",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 491321,
  "published_at": "2024-06-20T11:13:35.212+00:00"
}