CVE-2023-39176A flaw was found within the parsing of SMB2 requests that have a transform header in the kernel ksmbd module.
Updated under an hour ago ()
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It affects linux_kernel. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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A flaw was found within the parsing of SMB2 requests that have a transform header in the kernel ksmbd module. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this to disclose sensitive information on affected installations of Linux. Only systems with ksmbd enabled are vulnerable to this CVE.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
linux linux_kernel linux:linux_kernel | from 5.15.121 before 5.15.127; from 6.1.36 before 6.1.46; from 6.3 before 6.3.10; from 6.4 before 6.4.11 | NVD |
References
- https://access.redhat.com/security/cve/CVE-2023-39176third-party-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2326503issue-tracking, third-party-advisory
- https://www.zerodayinitiative.com/advisories/ZDI-24-586/third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.