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🛡️ CVE-2024-56542 — kernel

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

Description

drm/amd/display: fix a memleak issue when driver is removed

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

drm/amd/display: fix a memleak issue when driver is removed

Running "modprobe amdgpu" the second time (followed by a modprobe -r

amdgpu) causes a call trace like:

[ 845.212163] Memory manager not clean during takedown.

[ 845.212170] WARNING: CPU: 4 PID: 2481 at drivers/gpu/drm/drm_mm.c:999 drm_mm_takedown+0x2b/0x40

[ 845.212177] Modules linked in: amdgpu(OE-) amddrm_ttm_helper(OE) amddrm_buddy(OE) amdxcp(OE) amd_sched(OE) drm_exec drm_suballoc_helper drm_display_helper i2c_algo_bit amdttm(OE) amdkcl(OE) cec rc_core sunrpc qrtr intel_rapl_msr intel_rapl_common snd_hda_codec_hdmi edac_mce_amd snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_usb_audio snd_hda_codec snd_usbmidi_lib kvm_amd snd_hda_core snd_ump mc snd_hwdep kvm snd_pcm snd_seq_midi snd_seq_midi_event irqbypass crct10dif_pclmul snd_rawmidi polyval_clmulni polyval_generic ghash_clmulni_intel sha256_ssse3 sha1_ssse3 snd_seq aesni_intel crypto_simd snd_seq_device cryptd snd_timer mfd_aaeon asus_nb_wmi eeepc_wmi joydev asus_wmi snd ledtrig_audio sparse_keymap ccp wmi_bmof input_leds k10temp i2c_piix4 platform_profile rapl soundcore gpio_amdpt mac_hid binfmt_misc msr parport_pc ppdev lp parport efi_pstore nfnetlink dmi_sysfs ip_tables x_tables autofs4 hid_logitech_hidpp hid_logitech_dj hid_generic usbhid hid ahci xhci_pci igc crc32_pclmul libahci xhci_pci_renesas video

[ 845.212284] wmi [last unloaded: amddrm_ttm_helper(OE)]

[ 845.212290] CPU: 4 PID: 2481 Comm: modprobe Tainted: G W OE 6.8.0-31-generic #31-Ubuntu

[ 845.212296] RIP: 0010:drm_mm_takedown+0x2b/0x40

[ 845.212300] Code: 1f 44 00 00 48 8b 47 38 48 83 c7 38 48 39 f8 75 09 31 c0 31 ff e9 90 2e 86 00 55 48 c7 c7 d0 f6 8e 8a 48 89 e5 e8 f5 db 45 ff <0f> 0b 5d 31 c0 31 ff e9 74 2e 86 00 66 0f 1f 84 00 00 00 00 00 90

[ 845.212302] RSP: 0018:ffffb11302127ae0 EFLAGS: 00010246

[ 845.212305] RAX: 0000000000000000 RBX: ffff92aa5020fc08 RCX: 0000000000000000

[ 845.212307] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000

[ 845.212309] RBP: ffffb11302127ae0 R08: 0000000000000000 R09: 0000000000000000

[ 845.212310] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004

[ 845.212312] R13: ffff92aa50200000 R14: ffff92aa5020fb10 R15: ffff92aa5020faa0

[ 845.212313] FS: 0000707dd7c7c080(0000) GS:ffff92b93de00000(0000) knlGS:0000000000000000

[ 845.212316] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 845.212318] CR2: 00007d48b0aee200 CR3: 0000000115a58000 CR4: 0000000000f50ef0

[ 845.212320] PKRU: 55555554

[ 845.212321] Call Trace:

[ 845.212323] <TASK>

[ 845.212328] ? show_regs+0x6d/0x80

[ 845.212333] ? __warn+0x89/0x160

[ 845.212339] ? drm_mm_takedown+0x2b/0x40

[ 845.212344] ? report_bug+0x17e/0x1b0

[ 845.212350] ? handle_bug+0x51/0xa0

[ 845.212355] ? exc_invalid_op+0x18/0x80

[ 845.212359] ? asm_exc_invalid_op+0x1b/0x20

[ 845.212366] ? drm_mm_takedown+0x2b/0x40

[ 845.212371] amdgpu_gtt_mgr_fini+0xa9/0x130 [amdgpu]

[ 845.212645] amdgpu_ttm_fini+0x264/0x340 [amdgpu]

[ 845.212770] amdgpu_bo_fini+0x2e/0xc0 [amdgpu]

[ 845.212894] gmc_v12_0_sw_fini+0x2a/0x40 [amdgpu]

[ 845.213036] amdgpu_device_fini_sw+0x11a/0x590 [amdgpu]

[ 845.213159] amdgpu_driver_release_kms+0x16/0x40 [amdgpu]

[ 845.213302] devm_drm_dev_init_release+0x5e/0x90

[ 845.213305] devm_action_release+0x12/0x30

[ 845.213308] release_nodes+0x42/0xd0

[ 845.213311] devres_release_all+0x97/0xe0

[ 845.213314] device_unbind_cleanup+0x12/0x80

[ 845.213317] device_release_driver_internal+0x230/0x270

[ 845.213319] ? srso_alias_return_thunk+0x5/0xfbef5

This is caused by lost memory during early init phase. First time driver

is removed, memory is freed but when second time the driver is inserted,

VBIOS dmub is not active, since the PSP policy is to retain the driver

loaded version on subsequent warm boots. Hence, communication with VBIOS

DMUB fails.

Fix this by aborting further comm

---truncated---

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-2024-56542 is recorded against 2 packages.

  • kernel (from 6.12.0 up to 6.12.2)
  • linux-kernel (from 6.12 up to 6.12.2)

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:

CVE-2024-56542 on other distributions

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

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 6.12.0 6.12.2
linux-kernel 6.12 6.12.2

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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