{
  "schema_version": "1.4.0",
  "id": "GHSA-54rc-p2rv-38v3",
  "modified": "2025-09-15T15:31:27Z",
  "published": "2025-09-15T15:31:27Z",
  "aliases": [
    "CVE-2022-50315"
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS\n\nUBSAN complains about array-index-out-of-bounds:\n[ 1.980703] kernel: UBSAN: array-index-out-of-bounds in /build/linux-9H675w/linux-5.15.0/drivers/ata/libahci.c:968:41\n[ 1.980709] kernel: index 15 is out of range for type 'ahci_em_priv [8]'\n[ 1.980713] kernel: CPU: 0 PID: 209 Comm: scsi_eh_8 Not tainted 5.15.0-25-generic #25-Ubuntu\n[ 1.980716] kernel: Hardware name: System manufacturer System Product Name/P5Q3, BIOS 1102 06/11/2010\n[ 1.980718] kernel: Call Trace:\n[ 1.980721] kernel: <TASK>\n[ 1.980723] kernel: show_stack+0x52/0x58\n[ 1.980729] kernel: dump_stack_lvl+0x4a/0x5f\n[ 1.980734] kernel: dump_stack+0x10/0x12\n[ 1.980736] kernel: ubsan_epilogue+0x9/0x45\n[ 1.980739] kernel: __ubsan_handle_out_of_bounds.cold+0x44/0x49\n[ 1.980742] kernel: ahci_qc_issue+0x166/0x170 [libahci]\n[ 1.980748] kernel: ata_qc_issue+0x135/0x240\n[ 1.980752] kernel: ata_exec_internal_sg+0x2c4/0x580\n[ 1.980754] kernel: ? vprintk_default+0x1d/0x20\n[ 1.980759] kernel: ata_exec_internal+0x67/0xa0\n[ 1.980762] kernel: sata_pmp_read+0x8d/0xc0\n[ 1.980765] kernel: sata_pmp_read_gscr+0x3c/0x90\n[ 1.980768] kernel: sata_pmp_attach+0x8b/0x310\n[ 1.980771] kernel: ata_eh_revalidate_and_attach+0x28c/0x4b0\n[ 1.980775] kernel: ata_eh_recover+0x6b6/0xb30\n[ 1.980778] kernel: ? ahci_do_hardreset+0x180/0x180 [libahci]\n[ 1.980783] kernel: ? ahci_stop_engine+0xb0/0xb0 [libahci]\n[ 1.980787] kernel: ? ahci_do_softreset+0x290/0x290 [libahci]\n[ 1.980792] kernel: ? trace_event_raw_event_ata_eh_link_autopsy_qc+0xe0/0xe0\n[ 1.980795] kernel: sata_pmp_eh_recover.isra.0+0x214/0x560\n[ 1.980799] kernel: sata_pmp_error_handler+0x23/0x40\n[ 1.980802] kernel: ahci_error_handler+0x43/0x80 [libahci]\n[ 1.980806] kernel: ata_scsi_port_error_handler+0x2b1/0x600\n[ 1.980810] kernel: ata_scsi_error+0x9c/0xd0\n[ 1.980813] kernel: scsi_error_handler+0xa1/0x180\n[ 1.980817] kernel: ? scsi_unjam_host+0x1c0/0x1c0\n[ 1.980820] kernel: kthread+0x12a/0x150\n[ 1.980823] kernel: ? set_kthread_struct+0x50/0x50\n[ 1.980826] kernel: ret_from_fork+0x22/0x30\n[ 1.980831] kernel: </TASK>\n\nThis happens because sata_pmp_init_links() initialize link->pmp up to\nSATA_PMP_MAX_PORTS while em_priv is declared as 8 elements array.\n\nI can't find the maximum Enclosure Management ports specified in AHCI\nspec v1.3.1, but \"12.2.1 LED message type\" states that \"Port Multiplier\nInformation\" can utilize 4 bits, which implies it can support up to 16\nports. Hence, use SATA_PMP_MAX_PORTS as EM_MAX_SLOTS to resolve the\nissue.\n\nBugLink: https://bugs.launchpad.net/bugs/1970074",
  "severity": [],
  "affected": [],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50315"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1e41e693f458eef2d5728207dbd327cd3b16580a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/303d0f761431d848dd8d7ff9fd9b8c101879cabe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/383b7c50f5445ff8dbbf03080905648d6980c39d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/67a00c299c5c143817c948fbc7de1a2fa1af38fb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8fbe13de1cc7cef2564be3cbf60400b33eee023b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d6314d5f68764550c84d732ce901ddd3ac6b415f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/da2ea4a961d9f89ed248734e7032350c260dc3a3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f70bd4339cb68bc7e206af4c922bc0d249244403"
    }
  ],
  "database_specific": {
    "cwe_ids": [],
    "severity": null,
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-15T15:15:43Z"
  }
}