CVE-2023-6356: Kernel: null pointer dereference in nvmet_tcp_build_iovec
Vulnerability summary
CVE-2023-6356 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in debian debian_linux. EPSS estimates a 1.46% chance of exploitation in the next 30 days, higher than 73.6% of scored vulnerabilities.
Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 33 · Related 28Timeline
- 07-02-2024PublishedVulnerability first disclosed.
- 06-11-2025Last 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 and causing kernel panic and a denial of service.
CVSS metrics
5 scores · 4 sources · 2 versions- CVE.orgCNA6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.46%
Chance of exploitation in the next 30 days
Percentile
74%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.46% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
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)
Redhat15 products
- codeready_linux_builder_eus8.6 | 9.2
- codeready_linux_builder_eus_for_power_little_endian_eus8.6_ppc64le | 9.2_ppc64le
- codeready_linux_builder_for_arm64_eus8.6_aarch64 | 9.2_aarch64
- codeready_linux_builder_for_ibm_z_systems_eus9.2_s390x
- enterprise_linux8.0 | 9.0
Debian2 products
- linux< 6.1.76-1 | < 6.6.15-1
- debian_linuxEOL10.0
Linux1 product
- linux_kernel≥ 5.0, < 5.4.268 | ≥ 5.5, < 5.10.209 | ≥ 5.11, < 5.15.148 | ≥ 5.16, < 6.1.75 | ≥ 6.2, < 6.6.14 | ≥ 6.7, < 6.7.2
4 vendors · 131 products
References
25 linksShow all 25 references
- security.netapp.com/advisory/ntap-20240415-0002/X Transferred