5.5

CVE-2023-53356: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2023-53356DEBIAN-CVE-2023-53356
Published 17-09-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2023-53356 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.19%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 14 · Related 14
SUSE-SU-2025:03600-1SUSE-SU-2025:03615-1SUSE-SU-2025:03628-1SUSE-SU-2025:03634-1SUSE-SU-2025:20851-1SUSE-SU-2025:20861-1

Timeline

  1. 17-09-2025
    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_suspend Consider a case where gserial_disconnect has already cleared gser->ioport. And if gserial_suspend gets called afterwards, it will lead to accessing of gser->ioport and thus causing null pointer dereference. Avoid this by adding a null pointer check. Added a static spinlock to prevent gser->ioport from becoming null after the newly added null pointer check.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

+0.01 pp

From 0.18% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.19%

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

Ubuntu108 products
  • linux< 5.15.0-86.96
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1047.52
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ aba3a8d01d623a5efef48ab8e78752d58d4c90c3, < 2788a3553f7497075653210b42e2aeb6ba95e28e | ≥ aba3a8d01d623a5efef48ab8e78752d58d4c90c3, < a8ea7ed644cbf6314b5b0136b5398754b549fb8f | ≥ aba3a8d01d623a5efef48ab8e78752d58d4c90c3, < e60a827ac074ce6bd58305fe5a86afab5fce6a04 | ≥ aba3a8d01d623a5efef48ab8e78752d58d4c90c3, < 374447e3367767156405bedd230c5d391f4b7962 | ≥ aba3a8d01d623a5efef48ab8e78752d58d4c90c3, < 2f6ecb89fe8feb2b60a53325b0eeb9866d88909a | 5.8
  • linux_kernel≥ 5.8, < 5.10.188 | ≥ 5.11, < 5.15.121 | ≥ 5.16, < 6.1.39 | ≥ 6.2, < 6.4.4
Debian1 product
  • linux< 6.1.52-1 | < 6.4.4-1

3 vendors · 111 products

References

9 links