CVE-2025-21993

highpriority · track · 28EPSS 0.002 · 12 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.22% (12th) EPSS

CVSS 7.1 · high

Is it mine?

56 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

In the Linux kernel, the following vulnerability has been resolved: iscsi_ibft: Fix UBSAN shift-out-of-bounds warning in ibft_attr_show_nic() When performing an iSCSI boot using IPv6, iscsistart still reads the /sys/firmware/ibft/ethernetX/subnet-mask entry. Since the IPv6 prefix length is 64, this causes the shift exponent to become negative, triggering a UBSAN warning. As the concept of a subnet mask does not apply to IPv6, the value is set to ~0 to suppress the warning message.

cvss

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

7.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–7.1

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.2

v3.17.1highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Hsecondary · ENISA EU

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Hsecondaryexploitability 1.8 · impact 5.2

v3.16.5mediumCVSS:3.1/AV:L/AC:L/PR:L/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.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-125USprimaryCWE-125US

affected products (56)

Products and version ranges known to be affected.

Dell PowerProtect Data Domain OS <7.13.1.60all versionscert_bundDE
Dell PowerProtect Data Domain OS <7.13.1.70all versionscert_bundDE
Dell PowerProtect Data Domain OS <8.3.1.20all versionscert_bundDE
Dell PowerProtect Data Domain OS <8.3.1.30all versionscert_bundDE
Dell PowerProtect Data Domain OS <8.6.0.0all versionscert_bundDE
Dell PowerProtect Data Domain OS <8.7.0.0all versionscert_bundDE
Dell PowerProtect Data Domain OS <8.7.0.1all versionscert_bundDE
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Dell PowerProtect Data Domain OS< 7.13.1.60cert_bundDE
Dell PowerProtect Data Domain OS< 7.13.1.70cert_bundDE
Dell PowerProtect Data Domain OS< 8.3.1.20cert_bundDE
Dell PowerProtect Data Domain OS< 8.3.1.30cert_bundDE
Dell PowerProtect Data Domain OS< 8.6.0.0cert_bundDE
Dell PowerProtect Data Domain OS< 8.7.0.0cert_bundDE
Dell PowerProtect Data Domain OS< 8.7.0.1cert_bundDE
Linux Linuxall versionsenisa_euvdEU
Linux Linux≤ 2.6.26enisa_euvdEU
Linux Linux< 5.10.236enisa_euvdEU
Linux Linux< 5.15.180enisa_euvdEU

showing 20 of 56

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-0698Linux Kernel: Mehrere SchwachstellenDeutsch2025-04-02csaf · cert_bundDE
Ein entfernter anonymer Angreifer kann mehrere Schwachstellen im Linux-Kernel ausnutzen, um einen 'Denial of Service'-Zustand zu erzeugen oder andere nicht spezifizierte Angriffe durchzuführen.
WID-SEC-W-2026-1118Dell PowerProtect Data Domain OS: Mehrere SchwachstellenDeutsch2026-04-14csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Dell PowerProtect Data Domain OS ausnutzen, um beliebigen Code auszuführen – sogar mit Root-Rechten –, um erweiterte Rechte zu erlangen – einschließlich Administratorrechte –, um Sicherheitsmaßnahmen zu umgehen, um Daten zu manipulieren, um vertrauliche Informationen offenzulegen oder um andere, nicht näher spezifizierte Angriffe durchzuführen.

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 CVE.org MITRE

published 2025-04-02modified 2026-06-17

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Related entries.

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+11867 more

references (25)

External citations — patches, advisories, analysis.

scry

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