CVE-2021-47066

mediumpriority · track · 22EPSS 0.002 · 14 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.24% (14th) EPSS

CVSS 5.5 · medium

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: async_xor: increase src_offs when dropping destination page Now we support sharing one page if PAGE_SIZE is not equal stripe size. To support this, it needs to support calculating xor value with different offsets for each r5dev. One offset array is used to record those offsets. In RMW mode, parity page is used as a source page. It sets ASYNC_TX_XOR_DROP_DST before calculating xor value in ops_run_prexor5. So it needs to add src_list and src_offs at the same time. Now it only needs src_list. So the xor value which is calculated is wrong. It can cause data corruption problem. I can reproduce this problem 100% on a POWER8 machine. The steps are: mdadm -CR /dev/md0 -l5 -n3 /dev/sdb1 /dev/sdc1 /dev/sdd1 --size=3G mkfs.xfs /dev/md0 mount /dev/md0 /mnt/test mount: /mnt/test: mount(2) system call failed: Structure needs cleaning.

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 · low–high · 3.4–7.1

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 3.6

v3.13.4lowAV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:Lsecondary · FSTEC (BDU) RU

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

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

v3.15.1mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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-119USCWE-222US

affected products (56)

Products and version ranges known to be affected.

Broadcom Brocade SANnavall versionscert_bundDEcpe:/a:broadcom:brocade_sannav:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Dell NetWorkerall versionscert_bundDEcpe:/a:dell:networker:-
Dell NetWorker <19.11all versionscert_bundDE
Dell NetWorker virtualall versionscert_bundDEcpe:/a:dell:networker:virtual
EMC Avamarall versionscert_bundDEcpe:/a:emc:avamar:-
IBM InfoSphere Guardiumall versionscert_bundDEcpe:/a:ibm:infosphere_guardium:-
IBM QRadar SIEMall versionscert_bundDEcpe:/a:ibm:qradar_siem:-
IBM QRadar SIEM <7.5.0 UP10 IF01all versionscert_bundDE
IBM QRadar SIEM <7.5.0 UP11all versionscert_bundDE
IBM Spectrum Protect Plus 10.1all versionscert_bundDEcpe:/a:ibm:spectrum_protect_plus:10.1
IBM Spectrum Protect Plus <10.1.16.3all versionscert_bundDE
IBM Spectrum Protect Plus <10.1.17all versionscert_bundDE
IBM Spectrum Protect Plus <10.1.6.4all versionscert_bundDE
IBM Storage Scale <6.1.9.5all versionscert_bundDE
IBM Storage Scale <6.2.2.0all versionscert_bundDE
IBM Storage Scale System <6.1.9.7all versionscert_bundDE
IBM Storage Scale System <6.1.9.8all versionscert_bundDE
IBM Storage Scale System <6.2.3.0all versionscert_bundDE
IBM Storage Scale System <6.2.3.1all versionscert_bundDE

showing 20 of 56

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2024-0527Linux Kernel: Mehrere SchwachstellenDeutsch2024-02-29csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen Denial of Service Zustand zu verursachen und einen nicht näher spezifizierten Angriff 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 2024-02-29modified 2026-08-04

references (11)

External citations — patches, advisories, analysis.

scry

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