7.5

CVE-2023-6535: Kernel: null pointer dereference in nvmet_tcp_execute_request

Modified
AliasesUBUNTU-CVE-2023-6535DEBIAN-CVE-2023-6535CGA-226m-hc2f-w9mh
Published 07-02-2024Last modified 06-11-2025

Vulnerability summary

CVE-2023-6535 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in linux linux_kernel. EPSS estimates a 1.55% chance of exploitation in the next 30 days, higher than 75.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
1.55%
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 35 · Related 31
DLA-3841-1OPENSUSE-SU-2024:13660-1OPENSUSE-SU-2025:14705-1RHSA-2024:0723RHSA-2024:0724RHSA-2024:0725

Timeline

  1. 07-02-2024
    PublishedVulnerability first disclosed.
  2. 06-11-2025
    Last modifiedVulnerability information updated.

Description

A flaw was found in the Linux kernel's NVMe driver. This issue may allow an unauthenticated malicious actor to send a set of crafted TCP packages when using NVMe over TCP, leading the NVMe driver to a NULL pointer dereference in the NVMe driver, causing kernel panic and a denial of service.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

1.55%

Chance of exploitation in the next 30 days

Percentile

75%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.55% 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: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu113 products
  • linux< 5.4.0-176.196 | < 5.15.0-102.112
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.4.0-1122.132 | < 5.15.0-1057.63
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard83 products
  • hyperv-daemons-6.18All versions (No fix recorded)
  • hyperv-daemons-genericAll versions (No fix recorded)
  • linux-aws-6.12< 6.12.65-r0 | All versions (No fix recorded)
  • linux-aws-6.12-boot-installedAll versions (No fix recorded)
  • linux-aws-6.12-fips-boot-installedAll versions (No fix recorded)
Redhat2 products
Debian1 product
  • linux< 6.1.76-1 | < 6.6.15-1
Linux1 product

5 vendors · 200 products · Showing 200 of 213

References

25 links
Show all 25 references