5.5

CVE-2023-53681: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2023-53681DEBIAN-CVE-2023-53681
Published 07-10-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2023-53681 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.4% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.14%
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 15 · Related 15
SUSE-SU-2025:21040-1SUSE-SU-2025:21052-1SUSE-SU-2025:21056-1SUSE-SU-2025:21064-1SUSE-SU-2025:4057-1SUSE-SU-2025:4111-1

Timeline

  1. 07-10-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: bcache: Fix __bch_btree_node_alloc to make the failure behavior consistent In some specific situations, the return value of __bch_btree_node_alloc may be NULL. This may lead to a potential NULL pointer dereference in caller function like a calling chain : btree_split->bch_btree_node_alloc->__bch_btree_node_alloc. Fix it by initializing the return value in __bch_btree_node_alloc.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

0.00 pp

From 0.14% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.14%

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

Ubuntu123 products
  • linuxAll versions (No fix recorded) | < 5.4.0-169.187 | < 5.15.0-86.96
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1116.126 | < 5.15.0-1047.52
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ cafe563591446cf80bfbc2fe3bc72a2e36cf1060, < 587b4e8bb5dac682f09280ab35db4632b29d5ac4 | ≥ cafe563591446cf80bfbc2fe3bc72a2e36cf1060, < b070f29a61436f6f8a2e3abc7ea4f4be81695198 | ≥ cafe563591446cf80bfbc2fe3bc72a2e36cf1060, < a4405f6ee03323410d7b10966fd67b35f71b1944 | ≥ cafe563591446cf80bfbc2fe3bc72a2e36cf1060, < f67b0e3081f2a24170280a33ac66f6b112083c03 | ≥ cafe563591446cf80bfbc2fe3bc72a2e36cf1060, < 7ecea5ce3dc17339c280c75b58ac93d8c8620d9f | ≥ cafe563591446cf80bfbc2fe3bc72a2e36cf1060, < 4514847aee18d9391a0cf3aad75d3567c72795a4 | ≥ cafe563591446cf80bfbc2fe3bc72a2e36cf1060, < 80fca8a10b604afad6c14213fdfd816c4eda3ee4 | 3.10
  • linux_kernel≥ 3.10, < 4.19.291 | ≥ 4.20, < 5.4.253 | ≥ 5.5, < 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 · 126 products

References

11 links
Show all 11 references