4.7

CVE-2025-21685: linux NULL Pointer Dereference

CVSS: 4.7v3.1MediumModified
AliasesUBUNTU-CVE-2025-21685DEBIAN-CVE-2025-21685
Published 09-02-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2025-21685 is a medium (CVSS 4.7) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.1% of scored vulnerabilities.

Overall risk
19/100
0100
Low · default modelHow is this calculated?
CVSS score
4.7/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.20%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
USN-7445-1USN-7448-1

Timeline

  1. 09-02-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: platform/x86: lenovo-yoga-tab2-pro-1380-fastcharger: fix serdev race The yt2_1380_fc_serdev_probe() function calls devm_serdev_device_open() before setting the client ops via serdev_device_set_client_ops(). This ordering can trigger a NULL pointer dereference in the serdev controller's receive_buf handler, as it assumes serdev->ops is valid when SERPORT_ACTIVE is set. This is similar to the issue fixed in commit 5e700b384ec1 ("platform/chrome: cros_ec_uart: properly fix race condition") where devm_serdev_device_open() was called before fully initializing the device. Fix the race by ensuring client ops are set before enabling the port via devm_serdev_device_open(). Note, serdev_device_set_baudrate() and serdev_device_set_flow_control() calls should be after the devm_serdev_device_open() call.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

0.00 pp

From 0.20% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.20%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu83 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ b2ed33e8d486ab2f1920131dd76fab38c8ef3550, < 3f67e07873df3c6d9ce2582260b83732e1d3a40b | ≥ b2ed33e8d486ab2f1920131dd76fab38c8ef3550, < 59616a91e5e74833b2008b56c66879857c616006 | 6.10
  • linux_kernel≥ 6.10, < 6.12.11 | 6.13:rc1 | 6.13:rc2 | 6.13:rc3 | 6.13:rc4 | 6.13:rc5 | 6.13:rc6 | 6.13:rc7
Debian1 product
  • linux< 6.12.11-1

3 vendors · 86 products

References

8 links