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NVD / CVE Program· CNA Linux

CVE-2021-47056: crypto: qat - ADF_STATUS_PF_RUNNING should be set after adf_dev_init

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.22% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 05ec8192ee4bfdf2a8894a68350dac9f1a155fa6, 09d16cee6285d37cc76311c29add6d97a7e4acda, 1ea500ce6f7c9106e4a561d28e69215f3d451818.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 05ec8192ee4bfdf2a8894a68350dac9f1a155fa6, 09d16cee6285d37cc76311c29add6d97a7e4acda, 1ea500ce6f7c9106e4a561d28e69215f3d451818 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: crypto: qat - ADF_STATUS_PF_RUNNING should be set after adf_dev_init ADF_STATUS_PF_RUNNING is (only) used and checked by adf_vf2pf_shutdown() before calling adf_iov_putmsg()->mutex_lock(vf2pf_lock), however the vf2pf_lock is initialized in adf_dev_init(), which can fail and when it fail, the vf2pf_lock is either not initialized or destroyed, a subsequent use of vf2pf_lock will cause issue. To fix this issue, only set this flag if adf_dev_init() returns 0. [ 7.178404] BUG: KASAN: user-memory-access in __mutex_lock.isra.0+0x1ac/0x7c0 [ 7.180345] Call Trace: [ 7.182576] mutex_lock+0xc9/0xd0 [ 7.183257] adf_iov_putmsg+0x118/0x1a0 [intel_qat] [ 7.183541] adf_vf2pf_shutdown+0x4d/0x7b [intel_qat] [ 7.183834] adf_dev_shutdown+0x172/0x2b0 [intel_qat] [ 7.184127] adf_probe+0x5e9/0x600 [qat_dh895xccvf]

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 29, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 13th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-47056

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel4.7 and later · before 4.9.269
  • linux linux kernel4.10 and later · before 4.14.233
  • linux linux kernel4.15 and later · before 4.19.191
  • linux linux kernel4.20 and later · before 5.4.119
  • linux linux kernel5.5 and later · before 5.10.37
  • linux linux kernel5.11 and later · before 5.11.21
  • linux linux kernel5.12 and later · before 5.12.4

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.7affected
    • 25c6ffb249f612c56a48ce48a3887adf57b8f4bd and later · before f4c4e07140687f42bfa40e091bb4a55d7960ce4daffected · git
    • 25c6ffb249f612c56a48ce48a3887adf57b8f4bd and later · before 446045cf682af12d9294765f6c46084b374b5654affected · git
    • 25c6ffb249f612c56a48ce48a3887adf57b8f4bd and later · before 09d16cee6285d37cc76311c29add6d97a7e4acdaaffected · git
    • 25c6ffb249f612c56a48ce48a3887adf57b8f4bd and later · before 05ec8192ee4bfdf2a8894a68350dac9f1a155fa6affected · git
    • 25c6ffb249f612c56a48ce48a3887adf57b8f4bd and later · before 1f50392650ae794a1aea41c213c6a3e1c824413caffected · git
    • 25c6ffb249f612c56a48ce48a3887adf57b8f4bd and later · before 20fd40fc6f2c2b41dc6f637f88d494b14e9c21f1affected · git
    • 25c6ffb249f612c56a48ce48a3887adf57b8f4bd and later · before 1ea500ce6f7c9106e4a561d28e69215f3d451818affected · git
    • 25c6ffb249f612c56a48ce48a3887adf57b8f4bd and later · before 8609f5cfdc872fc3a462efa6a3eca5cb1e2f6446affected · git
    • before 4.7not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.10.38-15.10.38-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2021-47054Feb 29, 2024 · bus: qcom: Put child node before return
    22Monitor
  • ← EarlierCVE-2021-47055Feb 29, 2024 · mtd: require write permissions for locking and badblock ioctls
    22Monitor
  • Later →CVE-2021-47057Feb 29, 2024 · crypto: sun8i-ss - Fix memory leak of object d when dma_iv fails to map
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux05ec8192ee4bfdf2a8894a68350dac9f1a155fa6Vendor (CNA)
Linux Linux09d16cee6285d37cc76311c29add6d97a7e4acdaVendor (CNA)
Linux Linux1ea500ce6f7c9106e4a561d28e69215f3d451818Vendor (CNA)
Linux Linux1f50392650ae794a1aea41c213c6a3e1c824413cVendor (CNA)
Linux Linux20fd40fc6f2c2b41dc6f637f88d494b14e9c21f1Vendor (CNA)
Linux Linux446045cf682af12d9294765f6c46084b374b5654Vendor (CNA)
Linux Linux8609f5cfdc872fc3a462efa6a3eca5cb1e2f6446Vendor (CNA)
Linux Linuxf4c4e07140687f42bfa40e091bb4a55d7960ce4dVendor (CNA)
debian:linux5.10.38-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2024-50302264 days apartHID: core: zero-initialize the report bufferKEV
    52Plan
  • CVE-2024-47685235 days apartnetfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put()
    36Monitor
  • CVE-2024-2702262 days apartfork: defer linking file vma until vma is fully initialized
    31Monitor
  • CVE-2021-4755385 days apartsched/scs: Reset task stack state in bringup_cpu()
    31Monitor
  • CVE-2024-3689891 days apartgpiolib: cdev: fix uninitialised kfifo
    31Monitor
  • CVE-2024-50143252 days apartudf: fix uninit-value use in udf_get_fileshortad
    31Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-908 · Use of Uninitialized Resource

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records