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🛡️ CVE-2024-56588 — kernel

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

scsi: hisi_sas: Create all dump files during debugfs initialization

In the Linux kernel, the following vulnerability has been resolved:

scsi: hisi_sas: Create all dump files during debugfs initialization

For the current debugfs of hisi_sas, after user triggers dump, the

driver allocate memory space to save the register information and create

debugfs files to display the saved information. In this process, the

debugfs files created after each dump.

Therefore, when the dump is triggered while the driver is unbind, the

following hang occurs:

[67840.853907] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a0

[67840.862947] Mem abort info:

[67840.865855] ESR = 0x0000000096000004

[67840.869713] EC = 0x25: DABT (current EL), IL = 32 bits

[67840.875125] SET = 0, FnV = 0

[67840.878291] EA = 0, S1PTW = 0

[67840.881545] FSC = 0x04: level 0 translation fault

[67840.886528] Data abort info:

[67840.889524] ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000

[67840.895117] CM = 0, WnR = 0, TnD = 0, TagAccess = 0

[67840.900284] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0

[67840.905709] user pgtable: 4k pages, 48-bit VAs, pgdp=0000002803a1f000

[67840.912263] [00000000000000a0] pgd=0000000000000000, p4d=0000000000000000

[67840.919177] Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP

[67840.996435] pstate: 80400009 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

[67841.003628] pc : down_write+0x30/0x98

[67841.007546] lr : start_creating.part.0+0x60/0x198

[67841.012495] sp : ffff8000b979ba20

[67841.016046] x29: ffff8000b979ba20 x28: 0000000000000010 x27: 0000000000024b40

[67841.023412] x26: 0000000000000012 x25: ffff20202b355ae8 x24: ffff20202b35a8c8

[67841.030779] x23: ffffa36877928208 x22: ffffa368b4972240 x21: ffff8000b979bb18

[67841.038147] x20: ffff00281dc1e3c0 x19: fffffffffffffffe x18: 0000000000000020

[67841.045515] x17: 0000000000000000 x16: ffffa368b128a530 x15: ffffffffffffffff

[67841.052888] x14: ffff8000b979bc18 x13: ffffffffffffffff x12: ffff8000b979bb18

[67841.060263] x11: 0000000000000000 x10: 0000000000000000 x9 : ffffa368b1289b18

[67841.067640] x8 : 0000000000000012 x7 : 0000000000000000 x6 : 00000000000003a9

[67841.075014] x5 : 0000000000000000 x4 : ffff002818c5cb00 x3 : 0000000000000001

[67841.082388] x2 : 0000000000000000 x1 : ffff002818c5cb00 x0 : 00000000000000a0

[67841.089759] Call trace:

[67841.092456] down_write+0x30/0x98

[67841.096017] start_creating.part.0+0x60/0x198

[67841.100613] debugfs_create_dir+0x48/0x1f8

[67841.104950] debugfs_create_files_v3_hw+0x88/0x348 [hisi_sas_v3_hw]

[67841.111447] debugfs_snapshot_regs_v3_hw+0x708/0x798 [hisi_sas_v3_hw]

[67841.118111] debugfs_trigger_dump_v3_hw_write+0x9c/0x120 [hisi_sas_v3_hw]

[67841.125115] full_proxy_write+0x68/0xc8

[67841.129175] vfs_write+0xd8/0x3f0

[67841.132708] ksys_write+0x70/0x108

[67841.136317] __arm64_sys_write+0x24/0x38

[67841.140440] invoke_syscall+0x50/0x128

[67841.144385] el0_svc_common.constprop.0+0xc8/0xf0

[67841.149273] do_el0_svc+0x24/0x38

[67841.152773] el0_svc+0x38/0xd8

[67841.156009] el0t_64_sync_handler+0xc0/0xc8

[67841.160361] el0t_64_sync+0x1a4/0x1a8

[67841.164189] Code: b9000882 d2800002 d2800023 f9800011 (c85ffc05)

[67841.170443] ---[ end trace 0000000000000000 ]---

To fix this issue, create all directories and files during debugfs

initialization. In this way, the driver only needs to allocate memory

space to save information each time the user triggers dumping.

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 none, integrity none, 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:N/I:N/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: None.
  • Integrity impact: None.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2024-56588 is recorded against 2 packages.

  • kernel (from 6.7.0 up to 6.12.5)
  • linux-kernel (fixed in 6.12.5)

Timeline and source

Published on 27 December 2024 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)
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:

Details

Severity Medium
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2024-12-27
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.7.0 6.12.5
linux-kernel — 6.12.5

Similar Threats

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