CVE-2022-50315

HIGH EPSS 4.9%
Published Sep 15, 20259mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Sep 15, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: ata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS UBSAN complains about array-index-out-of-bounds: [ 1.980703] kernel: UBSAN: array-index-out-of-bounds in /build/linux-9H675w/linux-5.15.0/drivers/ata/libahci.c:968:41 [ 1.980709] kernel: index 15 is out of range for type 'ahci_em_priv [8]' [ 1.980713] kernel: CPU: 0 PID: 209 Comm: scsi_eh_8 Not tainted 5.15.0-25-generic #25-Ubuntu [ 1.980716] kernel: Hardware name: System manufacturer System Product Name/P5Q3, BIOS 1102 06/11/2010 [ 1.980718] kernel: Call Trace: [ 1.980721] kernel: <TASK> [ 1.980723] kernel: show_stack+0x52/0x58 [ 1.980729] kernel: dump_stack_lvl+0x4a/0x5f [ 1.980734] kernel: dump_stack+0x10/0x12 [ 1.980736] kernel: ubsan_epilogue+0x9/0x45 [ 1.980739] kernel: __ubsan_handle_out_of_bounds.cold+0x44/0x49 [ 1.980742] kernel: ahci_qc_issue+0x166/0x170 [libahci] [ 1.980748] kernel: ata_qc_issue+0x135/0x240 [ 1.980752] kernel: ata_exec_internal_sg+0x2c4/0x580 [ 1.980754] kernel: ? vprintk_default+0x1d/0x20 [ 1.980759] kernel: ata_exec_internal+0x67/0xa0 [ 1.980762] kernel: sata_pmp_read+0x8d/0xc0 [ 1.980765] kernel: sata_pmp_read_gscr+0x3c/0x90 [ 1.980768] kernel: sata_pmp_attach+0x8b/0x310 [ 1.980771] kernel: ata_eh_revalidate_and_attach+0x28c/0x4b0 [ 1.980775] kernel: ata_eh_recover+0x6b6/0xb30 [ 1.980778] kernel: ? ahci_do_hardreset+0x180/0x180 [libahci] [ 1.980783] kernel: ? ahci_stop_engine+0xb0/0xb0 [libahci] [ 1.980787] kernel: ? ahci_do_softreset+0x290/0x290 [libahci] [ 1.980792] kernel: ? trace_event_raw_event_ata_eh_link_autopsy_qc+0xe0/0xe0 [ 1.980795] kernel: sata_pmp_eh_recover.isra.0+0x214/0x560 [ 1.980799] kernel: sata_pmp_error_handler+0x23/0x40 [ 1.980802] kernel: ahci_error_handler+0x43/0x80 [libahci] [ 1.980806] kernel: ata_scsi_port_error_handler+0x2b1/0x600 [ 1.980810] kernel: ata_scsi_error+0x9c/0xd0 [ 1.980813] kernel: scsi_error_handler+0xa1/0x180 [ 1.980817] kernel: ? scsi_unjam_host+0x1c0/0x1c0 [ 1.980820] kernel: kthread+0x12a/0x150 [ 1.980823] kernel: ? set_kthread_struct+0x50/0x50 [ 1.980826] kernel: ret_from_fork+0x22/0x30 [ 1.980831] kernel: </TASK> This happens because sata_pmp_init_links() initialize link->pmp up to SATA_PMP_MAX_PORTS while em_priv is declared as 8 elements array. I can't find the maximum Enclosure Management ports specified in AHCI spec v1.3.1, but "12.2.1 LED message type" states that "Port Multiplier Information" can utilize 4 bits, which implies it can support up to 16 ports. Hence, use SATA_PMP_MAX_PORTS as EM_MAX_SLOTS to resolve the issue. BugLink: https://bugs.launchpad.net/bugs/1970074

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
4.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-129

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel* <4.9.332
linuxlinux_kernel*≥4.10  –  <4.14.298
linuxlinux_kernel*≥4.15  –  <4.19.264
linuxlinux_kernel*≥4.20  –  <5.4.221
linuxlinux_kernel*≥5.5  –  <5.10.152
linuxlinux_kernel*≥5.11  –  <5.15.76
linuxlinux_kernel*≥5.16  –  <6.0.6
linuxlinux_kernel6.1any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/1e41e693f458eef2d5728207dbd327cd3b16580a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/303d0f761431d848dd8d7ff9fd9b8c101879cabe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/383b7c50f5445ff8dbbf03080905648d6980c39d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/67a00c299c5c143817c948fbc7de1a2fa1af38fb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8fbe13de1cc7cef2564be3cbf60400b33eee023b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d6314d5f68764550c84d732ce901ddd3ac6b415f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/da2ea4a961d9f89ed248734e7032350c260dc3a3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f70bd4339cb68bc7e206af4c922bc0d249244403
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1e41e693f458eef2d5728207dbd327cd3b16580a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/303d0f761431d848dd8d7ff9fd9b8c101879cabe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/383b7c50f5445ff8dbbf03080905648d6980c39d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/67a00c299c5c143817c948fbc7de1a2fa1af38fb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8fbe13de1cc7cef2564be3cbf60400b33eee023b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d6314d5f68764550c84d732ce901ddd3ac6b415f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/da2ea4a961d9f89ed248734e7032350c260dc3a3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f70bd4339cb68bc7e206af4c922bc0d249244403
    Patch