CVE-2025-71285

MEDIUM EPSS 2.7%
Published May 6, 20261mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published May 6, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: net: qrtr: Drop the MHI auto_queue feature for IPCR DL channels MHI stack offers the 'auto_queue' feature, which allows the MHI stack to auto queue the buffers for the RX path (DL channel). Though this feature simplifies the client driver design, it introduces race between the client drivers and the MHI stack. For instance, with auto_queue, the 'dl_callback' for the DL channel may get called before the client driver is fully probed. This means, by the time the dl_callback gets called, the client driver's structures might not be initialized, leading to NULL ptr dereference. Currently, the drivers have to workaround this issue by initializing the internal structures before calling mhi_prepare_for_transfer_autoqueue(). But even so, there is a chance that the client driver's internal code path may call the MHI queue APIs before mhi_prepare_for_transfer_autoqueue() is called, leading to similar NULL ptr dereference. This issue has been reported on the Qcom X1E80100 CRD machines affecting boot. So to properly fix all these races, drop the MHI 'auto_queue' feature altogether and let the client driver (QRTR) manage the RX buffers manually. In the QRTR driver, queue the RX buffers based on the ring length during probe and recycle the buffers in 'dl_callback' once they are consumed. This also warrants removing the setting of 'auto_queue' flag from controller drivers. Currently, this 'auto_queue' feature is only enabled for IPCR DL channel. So only the QRTR client driver requires the modification.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
2.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel*≥5.15.63  –  <5.16
linuxlinux_kernel*≥5.17  –  <6.18.17
linuxlinux_kernel*≥6.19  –  <6.19.6

References 3

  • git.kernel.org https://git.kernel.org/stable/c/51731792a25cb312ca94cdccfa139eb46de1b2ef
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7bdff9b9b0c65ac7105416fe3a40686832515e20
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8c464e00e0754e016816b1860fa9592dcad80eb2
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/51731792a25cb312ca94cdccfa139eb46de1b2ef
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7bdff9b9b0c65ac7105416fe3a40686832515e20
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8c464e00e0754e016816b1860fa9592dcad80eb2
    Patch