5.5

CVE-2023-53551: usb: gadget: u_serial: Add null pointer check in gserial_resume

Analyzed
AliasesUBUNTU-CVE-2023-53551DEBIAN-CVE-2023-53551
Published 04-10-2025Last modified 11-05-2026

Vulnerability summary

CVE-2023-53551 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.16%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 4
SUSE-SU-2025:4111-1SUSE-SU-2025:4139-1SUSE-SU-2025:4149-1SUSE-SU-2025:4320-1

Timeline

  1. 04-10-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: u_serial: Add null pointer check in gserial_resume Consider a case where gserial_disconnect has already cleared gser->ioport. And if a wakeup interrupt triggers afterwards, gserial_resume gets called, which will lead to accessing of gser->ioport and thus causing null pointer dereference.Add a null pointer check to prevent this. Added a static spinlock to prevent gser->ioport from becoming null after the newly added check.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.16% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu103 products
  • linux< 5.15.0-72.79
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1036.40
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ aba3a8d01d623a5efef48ab8e78752d58d4c90c3, < c5360eec648bd506afa304ae4a71f82e13d41897 | ≥ aba3a8d01d623a5efef48ab8e78752d58d4c90c3, < 3b24c980dc07be4550a9d1450ed7057f882530e5 | ≥ aba3a8d01d623a5efef48ab8e78752d58d4c90c3, < ec357cd3e8af614855d286dd378725cdc7264df6 | ≥ aba3a8d01d623a5efef48ab8e78752d58d4c90c3, < 44e004f757a7ae13dfebaadbcfdb1a6f98c10377 | ≥ aba3a8d01d623a5efef48ab8e78752d58d4c90c3, < 5ec63fdbca604568890c577753c6f66c5b3ef0b5 | 5.8
  • linux_kernel≥ 5.8, < 5.10.171 | ≥ 5.11, < 5.15.97 | ≥ 5.16, < 6.1.15 | ≥ 6.2, < 6.2.2
Debian1 product
  • linux< 6.1.15-1

3 vendors · 106 products

References

9 links