CVE-2023-38429: linux linux_kernel Off-by-one Error
Vulnerability summary
CVE-2023-38429 is a critical (CVSS 9.8) Off-by-one Error vulnerability in linux linux_kernel. EPSS estimates a 1.18% chance of exploitation in the next 30 days, higher than 67.6% of scored vulnerabilities.
Severe, CVSS 9.8 (NVD); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 8 · Related 8Timeline
- 17-07-2023PublishedVulnerability first disclosed.
- 03-01-2025Last modifiedVulnerability information updated.
Description
An issue was discovered in the Linux kernel before 6.3.4. fs/ksmbd/connection.c in ksmbd has an off-by-one error in memory allocation (because of ksmbd_smb2_check_message) that may lead to out-of-bounds access.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
1.18%
Chance of exploitation in the next 30 days
Percentile
68%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.18% 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, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
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)
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
3 vendors · 90 products
