An issue was discovered in the Linux kernel before 6.3.4. ksmbd has an out-of-bounds read in smb2_find_context_vals when create_context's name_len is larger than the tag length.
CVE-2023-38426
CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence
Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2023-07-18. NVD baseline CVSS 9.1; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS: 9.1Exploit: None knownExposed: 0
A fix is available — apply it.
- CVSS v3
- 9.1
- EG Score
- 9.1(medium)
- EG Risk
- 47(Track)EG Risk 47/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity91% × 45%Exploitation3% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 3%
- EPSS %ILE
- 87%
- KEV
- Not listed
Published
July 18, 2023
Last Modified
November 21, 2024
References (6)
- cve@mitrehttps://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.4
- cve@mitrehttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/ksmbd?id=02f76c401d17e409ed45bf7887148fcc22c93c85
- cve@mitrehttps://security.netapp.com/advisory/ntap-20230915-0010/
- af854a3a-2127-422b-91ae-364da2661108https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.4
- af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/ksmbd?id=02f76c401d17e409ed45bf7887148fcc22c93c85
- af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20230915-0010/
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Frequently asked(5)
What is CVE-2023-38426?
CVE-2023-38426 is a critical vulnerability published on July 18, 2023. An issue was discovered in the Linux kernel before 6.3.4. ksmbd has an out-of-bounds read in smb2findcontextvals when createcontext's name_len is larger than the tag length.
When was CVE-2023-38426 disclosed?
CVE-2023-38426 was first published in the National Vulnerability Database on July 18, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-38426 actively exploited?
CVE-2023-38426 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 13.1% of all scored CVEs.
What is the CVSS score of CVE-2023-38426?
CVE-2023-38426 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2023-38426?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-38426, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2023-38426
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