CVE-2023-38428: linux linux_kernel Out-of-bounds Read
CVSS: 9.1v3.1CriticalModified
AliasesUBUNTU-CVE-2023-38428DEBIAN-CVE-2023-38428
Published 17-07-2023Last modified 15-10-2024
Vulnerability summary
CVE-2023-38428 is a critical (CVSS 9.1) Out-of-bounds Read vulnerability in linux linux_kernel. EPSS estimates a 3.16% chance of exploitation in the next 30 days, higher than 87.7% of scored vulnerabilities.
CVSS score
9.1/10
010
Critical · v3.1 (CVE.org)EPSS score
3.16%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 8 · Related 8Timeline
- 17-07-2023PublishedVulnerability first disclosed.
- 15-10-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in the Linux kernel before 6.3.4. fs/ksmbd/smb2pdu.c in ksmbd does not properly check the UserName value because it does not consider the address of security buffer, leading to an out-of-bounds read.
CVSS metrics
4 scores · 4 sources · 1 versionCritical 9.1Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated9.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated9.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- NVDNIST9.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
3.16%
Chance of exploitation in the next 30 days
Percentile
88%
Versus all other CVEs
30-day change
0.00 pp
From 3.16% on 19-09-2026
19-09-202619-10-2026
EPSS score3.16%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu88 products
- linux< 5.15.0-83.92
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.15.0-1044.49
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Netapp6 products
Debian1 product
- linux< 6.1.37-1 | < 6.3.7-1
Linux1 product
- linux_kernel≥ 5.15, < 5.15.113 | ≥ 5.16, < 6.1.30 | ≥ 6.2, < 6.3.4
4 vendors · 96 products
