CVE-2023-38431

criticalpriority · track · 36EPSS 0.012 · 67 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.16% (67th) EPSS

CVSS 9.1 · critical

Is it mine?

18 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

An issue was discovered in the Linux kernel before 6.3.8. fs/smb/server/connection.c in ksmbd does not validate the relationship between the NetBIOS header's length field and the SMB header sizes, via pdu_size in ksmbd_conn_handler_loop, leading to an out-of-bounds read.

cvss

Technical severity, 0–10. One row per scoring source.

9.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.3–9.1

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.2

v3.19.1criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.18.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-125USprimaryCWE-125US

affected products (18)

Products and version ranges known to be affected.

Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
n/a n/a≤ n/aenisa_euvdEU
АО «ИВК» АЛЬТ СП 10all versionsfstec_bduRU
АО «НТЦ ИТ РОСА» РОСА ХРОМ≤ 12.4fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 4.7fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 1.7fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 1.6 «Смоленск»fstec_bduRU
Сообщество свободного программного обеспечения Linux5.15 → 5.15.144fstec_bduRU
Сообщество свободного программного обеспечения Linux5.16 → 6.1.33fstec_bduRU
Сообщество свободного программного обеспечения Linux6.2 → 6.3.7fstec_bduRU
linux linux kernel5.15 → 5.15.145nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel5.16 → 6.1.34nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel6.2 → 6.3.8nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
netapp h300sall versionsnvdUScpe:2.3:h:netapp:h300s:*:*:*:*:*:*:*:*
netapp h410sall versionsnvdUScpe:2.3:h:netapp:h410s:*:*:*:*:*:*:*:*
netapp h500sall versionsnvdUScpe:2.3:h:netapp:h500s:*:*:*:*:*:*:*:*
netapp h700sall versionsnvdUScpe:2.3:h:netapp:h700s:*:*:*:*:*:*:*:*
netapp solidfire & hci management nodeall versionsnvdUScpe:2.3:a:netapp:solidfire_\&_hci_management_node:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-1770Linux Kernel: Mehrere Schwachstellen ermöglichen Offenlegung von Informationen oder Umgehung von SicherheitsvorkehrungenDeutsch2023-07-17csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um Informationen offenzulegen oder Sicherheitsvorkehrungen zu umgehen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd NVD CVE.org MITRE

published 2023-07-18modified 2026-06-17

related (11,874)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2026-11645US	—OT critical	2.44% (84th)	KEV	2026-06-09
Out of bounds read and write in V8 in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium…
CVE-2026-3055US	critical9.8OT critical	91.5% (100th)	KEV	2026-03-23
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
CVE-2025-5777US	high7.5OT critical	100.0% (100th)	KEV	2025-06-17
Insufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
CVE-2025-5419US	—OT critical	7.82% (95th)	KEV	2025-06-03
Out of bounds read and write in V8 in Google Chrome prior to 137.0.7151.68 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium secur…
CVE-2025-24991US	—OT critical	2.02% (81st)	KEV	2025-03-11
Out-of-bounds read in Windows NTFS allows an authorized attacker to disclose information locally.

+11869 more

references (12)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan