CVE-2023-38428

criticalpriority · track · 37EPSS 0.032 · 88 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

3.16% (88th) EPSS

CVSS 9.1 · critical

Is it mine?

19 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 6.3.4. 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

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

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Hsecondary · ENISA EU

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

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)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-125USprimaryCWE-125US

affected products (19)

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 «НППКТ» ОСОН ОСнова Оnyx≤ 2.9fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 4.7fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 1.6 «Смоленск»fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 1.7fstec_bduRU
Сообщество свободного программного обеспечения Linux5.15 → 5.15.112fstec_bduRU
Сообщество свободного программного обеспечения Linux5.16 → 6.1.29fstec_bduRU
Сообщество свободного программного обеспечения Linux6.2 → 6.3.3fstec_bduRU
linux linux kernel5.15 → 5.15.113nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel5.16 → 6.1.30nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel6.2 → 6.3.4nvdUScpe: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:*:*:*:*:*:*:*:*
netapp solidfire & hci storage nodeall versionsnvdUScpe:2.3:a:netapp:solidfire_\&_hci_storage_node:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-1773Linux Kernel: Mehrere SchwachstellenDeutsch2023-07-17csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um Informationen offenzulegen und Sicherheitsmaßnahmen 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.

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+11869 more

references (15)

External citations — patches, advisories, analysis.

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