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🛡️ CVE-2024-49942 — kernel

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

Description

drm/xe: Prevent null pointer access in xe_migrate_copy

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

drm/xe: Prevent null pointer access in xe_migrate_copy

xe_migrate_copy designed to copy content of TTM resources. When source

resource is null, it will trigger a NULL pointer dereference in

xe_migrate_copy. To avoid this situation, update lacks source flag to

true for this case, the flag will trigger xe_migrate_clear rather than

xe_migrate_copy.

Issue trace:

<7> [317.089847] xe 0000:00:02.0: [drm:xe_migrate_copy [xe]] Pass 14,

sizes: 4194304 & 4194304

<7> [317.089945] xe 0000:00:02.0: [drm:xe_migrate_copy [xe]] Pass 15,

sizes: 4194304 & 4194304

<1> [317.128055] BUG: kernel NULL pointer dereference, address:

0000000000000010

<1> [317.128064] #PF: supervisor read access in kernel mode

<1> [317.128066] #PF: error_code(0x0000) - not-present page

<6> [317.128069] PGD 0 P4D 0

<4> [317.128071] Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI

<4> [317.128074] CPU: 1 UID: 0 PID: 1440 Comm: kunit_try_catch Tainted:

G U N 6.11.0-rc7-xe #1

<4> [317.128078] Tainted: [U]=USER, [N]=TEST

<4> [317.128080] Hardware name: Intel Corporation Lunar Lake Client

Platform/LNL-M LP5 RVP1, BIOS LNLMFWI1.R00.3221.D80.2407291239 07/29/2024

<4> [317.128082] RIP: 0010:xe_migrate_copy+0x66/0x13e0 [xe]

<4> [317.128158] Code: 00 00 48 89 8d e0 fe ff ff 48 8b 40 10 4c 89 85 c8

fe ff ff 44 88 8d bd fe ff ff 65 48 8b 3c 25 28 00 00 00 48 89 7d d0 31

ff <8b> 79 10 48 89 85 a0 fe ff ff 48 8b 00 48 89 b5 d8 fe ff ff 83 ff

<4> [317.128162] RSP: 0018:ffffc9000167f9f0 EFLAGS: 00010246

<4> [317.128164] RAX: ffff8881120d8028 RBX: ffff88814d070428 RCX:

0000000000000000

<4> [317.128166] RDX: ffff88813cb99c00 RSI: 0000000004000000 RDI:

0000000000000000

<4> [317.128168] RBP: ffffc9000167fbb8 R08: ffff88814e7b1f08 R09:

0000000000000001

<4> [317.128170] R10: 0000000000000001 R11: 0000000000000001 R12:

ffff88814e7b1f08

<4> [317.128172] R13: ffff88814e7b1f08 R14: ffff88813cb99c00 R15:

0000000000000001

<4> [317.128174] FS: 0000000000000000(0000) GS:ffff88846f280000(0000)

knlGS:0000000000000000

<4> [317.128176] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

<4> [317.128178] CR2: 0000000000000010 CR3: 000000011f676004 CR4:

0000000000770ef0

<4> [317.128180] DR0: 0000000000000000 DR1: 0000000000000000 DR2:

0000000000000000

<4> [317.128182] DR3: 0000000000000000 DR6: 00000000ffff07f0 DR7:

0000000000000400

<4> [317.128184] PKRU: 55555554

<4> [317.128185] Call Trace:

<4> [317.128187] <TASK>

<4> [317.128189] ? show_regs+0x67/0x70

<4> [317.128194] ? __die_body+0x20/0x70

<4> [317.128196] ? __die+0x2b/0x40

<4> [317.128198] ? page_fault_oops+0x15f/0x4e0

<4> [317.128203] ? do_user_addr_fault+0x3fb/0x970

<4> [317.128205] ? lock_acquire+0xc7/0x2e0

<4> [317.128209] ? exc_page_fault+0x87/0x2b0

<4> [317.128212] ? asm_exc_page_fault+0x27/0x30

<4> [317.128216] ? xe_migrate_copy+0x66/0x13e0 [xe]

<4> [317.128263] ? __lock_acquire+0xb9d/0x26f0

<4> [317.128265] ? __lock_acquire+0xb9d/0x26f0

<4> [317.128267] ? sg_free_append_table+0x20/0x80

<4> [317.128271] ? lock_acquire+0xc7/0x2e0

<4> [317.128273] ? mark_held_locks+0x4d/0x80

<4> [317.128275] ? trace_hardirqs_on+0x1e/0xd0

<4> [317.128278] ? _raw_spin_unlock_irqrestore+0x31/0x60

<4> [317.128281] ? __pm_runtime_resume+0x60/0xa0

<4> [317.128284] xe_bo_move+0x682/0xc50 [xe]

<4> [317.128315] ? lock_is_held_type+0xaa/0x120

<4> [317.128318] ttm_bo_handle_move_mem+0xe5/0x1a0 [ttm]

<4> [317.128324] ttm_bo_validate+0xd1/0x1a0 [ttm]

<4> [317.128328] shrink_test_run_device+0x721/0xc10 [xe]

<4> [317.128360] ? find_held_lock+0x31/0x90

<4> [317.128363] ? lock_release+0xd1/0x2a0

<4> [317.128365] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10

[kunit]

<4> [317.128370] xe_bo_shrink_kunit+0x11/0x20 [xe]

<4> [317.128397] kunit_try_run_case+0x6e/0x150 [kunit]

<4> [317.128400] ? trace_hardirqs_on+0x1e/0xd0

<4> [317.128402] ? _raw_spin_unlock_irqrestore+0x31/0x60

<4> [317.128404] kunit_generic_run_threadfn_adapter+0x1e/0x40 [ku

---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-2024-49942 is recorded against 2 packages.

  • kernel (from 6.11.0 up to 6.11.3)
  • linux-kernel

Timeline and source

Published on 21 October 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-2024-49942 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 2024-10-21
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.11.0 6.11.3
linux-kernel — —

Similar Threats

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