CVE-2025-38048

MEDIUM EPSS 1.6%
Published Jun 18, 20251y ago · Modified Jun 17, 20261w ago
4.7 CVSS 3.1
Medium
Find Similar
Published Jun 18, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: virtio_ring: Fix data race by tagging event_triggered as racy for KCSAN syzbot reports a data-race when accessing the event_triggered, here is the simplified stack when the issue occurred: ================================================================== BUG: KCSAN: data-race in virtqueue_disable_cb / virtqueue_enable_cb_delayed write to 0xffff8881025bc452 of 1 bytes by task 3288 on cpu 0: virtqueue_enable_cb_delayed+0x42/0x3c0 drivers/virtio/virtio_ring.c:2653 start_xmit+0x230/0x1310 drivers/net/virtio_net.c:3264 __netdev_start_xmit include/linux/netdevice.h:5151 [inline] netdev_start_xmit include/linux/netdevice.h:5160 [inline] xmit_one net/core/dev.c:3800 [inline] read to 0xffff8881025bc452 of 1 bytes by interrupt on cpu 1: virtqueue_disable_cb_split drivers/virtio/virtio_ring.c:880 [inline] virtqueue_disable_cb+0x92/0x180 drivers/virtio/virtio_ring.c:2566 skb_xmit_done+0x5f/0x140 drivers/net/virtio_net.c:777 vring_interrupt+0x161/0x190 drivers/virtio/virtio_ring.c:2715 __handle_irq_event_percpu+0x95/0x490 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] value changed: 0x01 -> 0x00 ================================================================== When the data race occurs, the function virtqueue_enable_cb_delayed() sets event_triggered to false, and virtqueue_disable_cb_split/packed() reads it as false due to the race condition. Since event_triggered is an unreliable hint used for optimization, this should only cause the driver temporarily suggest that the device not send an interrupt notification when the event index is used. Fix this KCSAN reported data-race issue by explicitly tagging the access as data_racy.

CVSS Details

Base Score
4.7
Exploitability
1.0
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
1.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-362

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel* <5.15.185
linuxlinux_kernel*≥5.16  –  <6.1.141
linuxlinux_kernel*≥6.2  –  <6.6.93
linuxlinux_kernel*≥6.7  –  <6.12.31
linuxlinux_kernel*≥6.13  –  <6.14.9
linuxlinux_kernel6.15any
linuxlinux_kernel6.15any
linuxlinux_kernel6.15any
debiandebian_linux11.0any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/02d2d6caee3abc9335cfca35f8eb4492173ae6f2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2e2f925fe737576df2373931c95e1a2b66efdfef
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4ed8f0e808b3fcc71c5b8be7902d8738ed595b17
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b49b5132e4c7307599492aee1cdc6d89f7f2a7da
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b6d6419548286b2b9d2b90df824d3cab797f6ae8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b730cb109633c455ce8a7cd6934986c6a16d88d8
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Third Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/02d2d6caee3abc9335cfca35f8eb4492173ae6f2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2e2f925fe737576df2373931c95e1a2b66efdfef
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4ed8f0e808b3fcc71c5b8be7902d8738ed595b17
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b49b5132e4c7307599492aee1cdc6d89f7f2a7da
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b6d6419548286b2b9d2b90df824d3cab797f6ae8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b730cb109633c455ce8a7cd6934986c6a16d88d8
    Patch