ima_fs: Correctly create securityfs files for unsupported hash algos

{
  "id": "257f3d352ebddb0ee9331a619964636685731121e76f31c2cb3a9594021f03a2",
  "url": "https://osv.dev/vulnerability/CVE-2026-53038",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ima_fs: Correctly create securityfs files for unsupported hash algos",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ima_fs: Correctly create securityfs files for unsupported hash algos ima_tpm_chip->allocated_banks[i].crypto_id is initialized to HASH_ALGO__LAST if the TPM algorithm is not supported. However there are places relying on the algorithm to be valid because it is accessed by hash_algo_name[]. On 6.12.40 I observe the following read out-of-bounds in hash_algo_name: ================================================================== BUG: KASAN: global-out-of-bounds in create_securityfs_measurement_lists+0x396/0x440 Read of size 8 at addr ffffffff83e18138 by task swapper/0/1 CPU: 4 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.12.40 #3 Call Trace: dump_stack_lvl+0x61/0x90 print_report+0xc4/0x580 ? kasan_addr_to_slab+0x26/0x80 ? create_securityfs_measurement_lists+0x396/0x440 kasan_report+0xc2/0x100 ? create_securityfs_measurement_lists+0x396/0x440 create_securityfs_measurement_lists+0x396/0x440 ima_fs_init+0xa3/0x300 ima_init+0x7d/0xd0 init_ima+0x28/0x100 do_one_initcall+0xa6/0x3e0 kernel_init_freeable+0x455/0x740 kernel_init+0x24/0x1d0 ret_from_fork+0x38/0x80 ret_from_fork_asm+0x11/0x20 The buggy address belongs to the variable: hash_algo_name+0xb8/0x420 Memory state around the buggy address: ffffffff83e18000: 00 01 f9 f9 f9 f9 f9 f9 00 01 f9 f9 f9 f9 f9 f9 ffffffff83e18080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffffff83e18100: 00 00 00 00 00 00 00 f9 f9 f9 f9 f9 00 05 f9 f9 ^ ffffffff83e18180: f9 f9 f9 ",
    "evidence": "osv:CVE-2026-53038",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.91",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.33",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.0.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-53038",
      "aliases": [
        "CVE-2026-53038"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9fa8e76250082a45d0d3dad525419ab98bd01658"
                },
                {
                  "fixed": "081b557cb56e1cfa8d1619b2601b01c53e3f418c"
                },
                {
                  "fixed": "b6766b171a5c4c33b26ff6fec530cb798db1f75e"
                },
                {
                  "fixed": "88d4e89a39f0de07798ca3fd93bd1a9ea212a82e"
                },
                {
                  "fixed": "d7bd8cf0b348d3edae7bee33e74a32b21668b181"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53038.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.10.0"
                },
                {
                  "fixed": "6.12.91"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.33"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.0.10"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53038.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:39.437418685Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/081b557cb56e1cfa8d1619b2601b01c53e3f418c",
        "https://git.kernel.org/stable/c/88d4e89a39f0de07798ca3fd93bd1a9ea212a82e",
        "https://git.kernel.org/stable/c/b6766b171a5c4c33b26ff6fec530cb798db1f75e",
        "https://git.kernel.org/stable/c/d7bd8cf0b348d3edae7bee33e74a32b21668b181",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53038.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-53038",
        "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/2026/53xxx/CVE-2026-53038.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-53038",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 506896,
  "published_at": "2026-06-24T16:29:45.086+00:00"
}