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🛡️ CVE-2025-37761 — kernel

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

Description

drm/xe: Fix an out-of-bounds shift when invalidating TLB

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

drm/xe: Fix an out-of-bounds shift when invalidating TLB

When the size of the range invalidated is larger than

rounddown_pow_of_two(ULONG_MAX),

The function macro roundup_pow_of_two(length) will hit an out-of-bounds

shift [1].

Use a full TLB invalidation for such cases.

v2:

  • Use a define for the range size limit over which we use a full

TLB invalidation. (Lucas)

  • Use a better calculation of the limit.

[1]:

[ 39.202421] ------------[ cut here ]------------

[ 39.202657] UBSAN: shift-out-of-bounds in ./include/linux/log2.h:57:13

[ 39.202673] shift exponent 64 is too large for 64-bit type 'long unsigned int'

[ 39.202688] CPU: 8 UID: 0 PID: 3129 Comm: xe_exec_system_ Tainted: G U 6.14.0+ #10

[ 39.202690] Tainted: [U]=USER

[ 39.202690] Hardware name: ASUS System Product Name/PRIME B560M-A AC, BIOS 2001 02/01/2023

[ 39.202691] Call Trace:

[ 39.202692] <TASK>

[ 39.202695] dump_stack_lvl+0x6e/0xa0

[ 39.202699] ubsan_epilogue+0x5/0x30

[ 39.202701] __ubsan_handle_shift_out_of_bounds.cold+0x61/0xe6

[ 39.202705] xe_gt_tlb_invalidation_range.cold+0x1d/0x3a [xe]

[ 39.202800] ? find_held_lock+0x2b/0x80

[ 39.202803] ? mark_held_locks+0x40/0x70

[ 39.202806] xe_svm_invalidate+0x459/0x700 [xe]

[ 39.202897] drm_gpusvm_notifier_invalidate+0x4d/0x70 [drm_gpusvm]

[ 39.202900] __mmu_notifier_release+0x1f5/0x270

[ 39.202905] exit_mmap+0x40e/0x450

[ 39.202912] __mmput+0x45/0x110

[ 39.202914] exit_mm+0xc5/0x130

[ 39.202916] do_exit+0x21c/0x500

[ 39.202918] ? lockdep_hardirqs_on_prepare+0xdb/0x190

[ 39.202920] do_group_exit+0x36/0xa0

[ 39.202922] get_signal+0x8f8/0x900

[ 39.202926] arch_do_signal_or_restart+0x35/0x100

[ 39.202930] syscall_exit_to_user_mode+0x1fc/0x290

[ 39.202932] do_syscall_64+0xa1/0x180

[ 39.202934] ? do_user_addr_fault+0x59f/0x8a0

[ 39.202937] ? lock_release+0xd2/0x2a0

[ 39.202939] ? do_user_addr_fault+0x5a9/0x8a0

[ 39.202942] ? trace_hardirqs_off+0x4b/0xc0

[ 39.202944] ? clear_bhb_loop+0x25/0x80

[ 39.202946] ? clear_bhb_loop+0x25/0x80

[ 39.202947] ? clear_bhb_loop+0x25/0x80

[ 39.202950] entry_SYSCALL_64_after_hwframe+0x76/0x7e

[ 39.202952] RIP: 0033:0x7fa945e543e1

[ 39.202961] Code: Unable to access opcode bytes at 0x7fa945e543b7.

[ 39.202962] RSP: 002b:00007ffca8fb4170 EFLAGS: 00000293

[ 39.202963] RAX: 000000000000003d RBX: 0000000000000000 RCX: 00007fa945e543e3

[ 39.202964] RDX: 0000000000000000 RSI: 00007ffca8fb41ac RDI: 00000000ffffffff

[ 39.202964] RBP: 00007ffca8fb4190 R08: 0000000000000000 R09: 00007fa945f600a0

[ 39.202965] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000

[ 39.202966] R13: 00007fa9460dd310 R14: 00007ffca8fb41ac R15: 0000000000000000

[ 39.202970] </TASK>

[ 39.202970] ---[ end trace ]---

(cherry picked from commit b88f48f86500bc0b44b4f73ac66d500a40d320ad)

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.

Affected software

CVE-2025-37761 is recorded against 2 packages.

  • kernel (from 6.13.0 up to 6.14.4)
  • linux-kernel

Timeline and source

Published on 1 May 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)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2025-37761 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 2025-05-01
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.13.0 6.14.4
linux-kernel — —

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