---
id: CVE-2025-37867
title: 'RDMA/core: Silence oversized kvmalloc() warning'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/core: Silence oversized kvmalloc() warning

  syzkaller triggered an oversized kvmalloc() warning.
  Silence it by adding __GFP_NOWARN.

  syzkaller log:
   WARNING: CPU: …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 37824952dc8fcd96e5c5a1ce9abf3f0ba09b1e5e <
    f94ac90ce7bd6f9266ad0d99044ed86e8d1416c1
  - >-
    Linux >= 37824952dc8fcd96e5c5a1ce9abf3f0ba09b1e5e <
    791daf8240cedf27af8794038ae1d32ef643bce6
  - >-
    Linux >= 37824952dc8fcd96e5c5a1ce9abf3f0ba09b1e5e <
    6c588e9afbab240c921f936cb676dac72e2e2b66
  - >-
    Linux >= 37824952dc8fcd96e5c5a1ce9abf3f0ba09b1e5e <
    ae470d06320dea4002d441784d691f0a26b4322d
  - >-
    Linux >= 37824952dc8fcd96e5c5a1ce9abf3f0ba09b1e5e <
    0d81bb58a203ad5f4044dc18cfbc230c194f650a
  - >-
    Linux >= 37824952dc8fcd96e5c5a1ce9abf3f0ba09b1e5e <
    f476eba25fdf70faa7b19a3e0fb00e65c5b53106
  - >-
    Linux >= 37824952dc8fcd96e5c5a1ce9abf3f0ba09b1e5e <
    9a0e6f15029e1a8a21e40f06fd05aa52b7f063de
  - Linux 5.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T20:42:42.716171Z'
published: '2025-05-09'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:52:06.140Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-37867'
references:
  - url: 'https://git.kernel.org/stable/c/f94ac90ce7bd6f9266ad0d99044ed86e8d1416c1'
  - url: 'https://git.kernel.org/stable/c/791daf8240cedf27af8794038ae1d32ef643bce6'
  - url: 'https://git.kernel.org/stable/c/6c588e9afbab240c921f936cb676dac72e2e2b66'
  - url: 'https://git.kernel.org/stable/c/ae470d06320dea4002d441784d691f0a26b4322d'
  - url: 'https://git.kernel.org/stable/c/0d81bb58a203ad5f4044dc18cfbc230c194f650a'
  - url: 'https://git.kernel.org/stable/c/f476eba25fdf70faa7b19a3e0fb00e65c5b53106'
  - url: 'https://git.kernel.org/stable/c/9a0e6f15029e1a8a21e40f06fd05aa52b7f063de'
tags:
  - cve.org
epss: 0.00306
epssPercentile: 0.23523
ingestedAt: '2026-11-05T22:38:31.887Z'
---

## Overview

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

RDMA/core: Silence oversized kvmalloc() warning

syzkaller triggered an oversized kvmalloc() warning.
Silence it by adding __GFP_NOWARN.

syzkaller log:
 WARNING: CPU: 7 PID: 518 at mm/util.c:665 __kvmalloc_node_noprof+0x175/0x180
 CPU: 7 UID: 0 PID: 518 Comm: c_repro Not tainted 6.11.0-rc6+ #6
 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
 RIP: 0010:__kvmalloc_node_noprof+0x175/0x180
 RSP: 0018:ffffc90001e67c10 EFLAGS: 00010246
 RAX: 0000000000000100 RBX: 0000000000000400 RCX: ffffffff8149d46b
 RDX: 0000000000000000 RSI: ffff8881030fae80 RDI: 0000000000000002
 RBP: 000000712c800000 R08: 0000000000000100 R09: 0000000000000000
 R10: ffffc90001e67c10 R11: 0030ae0601000000 R12: 0000000000000000
 R13: 0000000000000000 R14: 00000000ffffffff R15: 0000000000000000
 FS:  00007fde79159740(0000) GS:ffff88813bdc0000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000020000180 CR3: 0000000105eb4005 CR4: 00000000003706b0
 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 Call Trace:
  <TASK>
  ib_umem_odp_get+0x1f6/0x390
  mlx5_ib_reg_user_mr+0x1e8/0x450
  ib_uverbs_reg_mr+0x28b/0x440
  ib_uverbs_write+0x7d3/0xa30
  vfs_write+0x1ac/0x6c0
  ksys_write+0x134/0x170
  ? __sanitizer_cov_trace_pc+0x1c/0x50
  do_syscall_64+0x50/0x110
  entry_SYSCALL_64_after_hwframe+0x76/0x7e

## Affected

- `Linux >= 37824952dc8fcd96e5c5a1ce9abf3f0ba09b1e5e < f94ac90ce7bd6f9266ad0d99044ed86e8d1416c1`
- `Linux >= 37824952dc8fcd96e5c5a1ce9abf3f0ba09b1e5e < 791daf8240cedf27af8794038ae1d32ef643bce6`
- `Linux >= 37824952dc8fcd96e5c5a1ce9abf3f0ba09b1e5e < 6c588e9afbab240c921f936cb676dac72e2e2b66`
- `Linux >= 37824952dc8fcd96e5c5a1ce9abf3f0ba09b1e5e < ae470d06320dea4002d441784d691f0a26b4322d`
- `Linux >= 37824952dc8fcd96e5c5a1ce9abf3f0ba09b1e5e < 0d81bb58a203ad5f4044dc18cfbc230c194f650a`
- `Linux >= 37824952dc8fcd96e5c5a1ce9abf3f0ba09b1e5e < f476eba25fdf70faa7b19a3e0fb00e65c5b53106`
- `Linux >= 37824952dc8fcd96e5c5a1ce9abf3f0ba09b1e5e < 9a0e6f15029e1a8a21e40f06fd05aa52b7f063de`
- `Linux 5.4`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.