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🛡️ CVE-2022-50315 — kernel

🟠 CVSS 7.8 — High ✅ No Known Exploit NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

ata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS

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

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2022-50315 is recorded against 2 packages.

  • kernel (from 5.16.0 up to 6.0.6)
  • linux-kernel

Timeline and source

Published on 15 September 2025 and last revised on 12 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

Other advisories for this package

kernel has other advisories on record. If you are patching this one, these are worth checking on the same host:

CVE-2022-50315 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity High
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2025-09-15
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 5.16.0 6.0.6
linux-kernel — —

References

Similar Threats

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