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NVD / CVE Program· CNA Linux

CVE-2021-47104: IB/qib: Fix memory leak in qib_user_sdma_queue_pkts()

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: 0.24% (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 0aaec9c5f60754b56f84460ea439b8c5e91f4caa, 1ced0a3015a95c6a6db45e37250912c4c86697ab, 4.14.260.

Low priority for now. Upgrade to Linux Linux 0aaec9c5f60754b56f84460ea439b8c5e91f4caa, 1ced0a3015a95c6a6db45e37250912c4c86697ab, 4.14.260 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: IB/qib: Fix memory leak in qib_user_sdma_queue_pkts() The wrong goto label was used for the error case and missed cleanup of the pkt allocation. Addresses-Coverity-ID: 1493352 ("Resource leak")

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Mar 4, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 15th 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-2021-47104

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 kernel4.4.292 and later · before 4.4.297
  • linux linux kernel4.9.290 and later · before 4.9.295
  • linux linux kernel4.14.255 and later · before 4.14.260
  • linux linux kernel4.19.216 and later · before 4.19.223
  • linux linux kernel5.4.157 and later · before 5.4.169
  • linux linux kernel5.10.77 and later · before 5.10.89
  • linux linux kernel5.15 and later · before 5.15.12
  • linux linux kernel5.16

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

    • 0d4395477741608d123dad51def9fe50b7ebe952, 5.15affected
    • bda41654b6e0c125a624ca35d6d20beb8015b5d0 and later · before 1ced0a3015a95c6a6db45e37250912c4c86697abaffected · git
    • 3f57c3f67fd93b4da86aeffea1ca32c484d054ad and later · before 76b648063eb36c72dfc0a6896de8a0a7d2c7841caffected · git
    • 60833707b968d5ae02a75edb7886dcd4a957cf0d and later · before d53456492b5d02033c73dfa0f3b94c86337791baaffected · git
    • 73d2892148aa4397a885b4f4afcfc5b27a325c42 and later · before 0aaec9c5f60754b56f84460ea439b8c5e91f4caaaffected · git
    • 0f8cdfff06829a0b0348b6debc29ff6a61967724 and later · before 79dcbd8176152b860028b62f81a635d987365752affected · git
    • c3e17e58f571f34c51aeb17274ed02c2ed5cf780 and later · before 7cf6466e00a77b0a914b7b2c28a1fc7947d55e59affected · git
    • d39bf40e55e666b5905fdbd46a0dced030ce87be and later · before aefcc25f3a0cd28a87d11d41d30419a12cd26a34affected · git
    • d39bf40e55e666b5905fdbd46a0dced030ce87be and later · before bee90911e0138c76ee67458ac0d58b38a3190f65affected · git
    • 4.4.292 and later · before 4.4.297affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.15.15-15.15.15-1
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-default-basebefore 5.3.18-150200.24.194.1.150200.9.99.15.3.18-150200.24.194.1.150200.9.99.1
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-docsbefore 5.3.18-150200.24.194.15.3.18-150200.24.194.1
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-obs-buildbefore 5.3.18-150200.24.194.15.3.18-150200.24.194.1
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-preemptbefore 5.3.18-150200.24.194.15.3.18-150200.24.194.1
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-sourcebefore 5.3.18-150200.24.194.15.3.18-150200.24.194.1
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-symsbefore 5.3.18-150200.24.194.15.3.18-150200.24.194.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-64kbbefore 5.3.18-150300.59.164.15.3.18-150300.59.164.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-default-basebefore 5.3.18-150300.59.164.1.150300.18.96.15.3.18-150300.59.164.1.150300.18.96.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-docsbefore 5.3.18-150300.59.164.15.3.18-150300.59.164.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-obs-buildbefore 5.3.18-150300.59.164.15.3.18-150300.59.164.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-preemptbefore 5.3.18-150300.59.164.15.3.18-150300.59.164.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-sourcebefore 5.3.18-150300.59.164.15.3.18-150300.59.164.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-symsbefore 5.3.18-150300.59.164.15.3.18-150300.59.164.1
SUSE:Linux Enterprise Live Patching 15 SP2kernel-defaultbefore 5.3.18-150200.24.194.15.3.18-150200.24.194.1
SUSE:Linux Enterprise Live Patching 15 SP2kernel-livepatch-SLE15-SP2_Update_49before 1-150200.5.3.11-150200.5.3.1
SUSE:Linux Enterprise Live Patching 15 SP3kernel-defaultbefore 5.3.18-150300.59.164.15.3.18-150300.59.164.1
SUSE:Linux Enterprise Live Patching 15 SP3kernel-livepatch-SLE15-SP3_Update_45before 1-150300.7.3.11-150300.7.3.1
SUSE:Linux Enterprise Micro 5.1kernel-rtbefore 5.3.18-150300.172.15.3.18-150300.172.1
SUSE:Linux Enterprise Micro 5.1kernel-source-rtbefore 5.3.18-150300.172.15.3.18-150300.172.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-defaultbefore 3.0.101-108.156.13.0.101-108.156.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-ec2before 3.0.101-108.156.13.0.101-108.156.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-sourcebefore 3.0.101-108.156.13.0.101-108.156.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-symsbefore 3.0.101-108.156.13.0.101-108.156.1

+3

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-2021-47102Mar 4, 2024 · net: marvell: prestera: fix incorrect structure access
    28Monitor
  • ← EarlierCVE-2021-47103Mar 4, 2024 · inet: fully convert sk->sk_rx_dst to RCU rules
    31Monitor
  • Later →CVE-2021-47105Mar 4, 2024 · ice: xsk: return xsk buffers back to pool when cleaning the ring
    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 Linux0aaec9c5f60754b56f84460ea439b8c5e91f4caaVendor (CNA)
Linux Linux1ced0a3015a95c6a6db45e37250912c4c86697abVendor (CNA)
Linux Linux4.14.260Vendor (CNA)
Linux Linux4.19.223Vendor (CNA)
Linux Linux4.4.297Vendor (CNA)
Linux Linux4.9.295Vendor (CNA)
Linux Linux5.10.89Vendor (CNA)
Linux Linux5.15Vendor (CNA)
Linux Linux5.4.169Vendor (CNA)
Linux Linux76b648063eb36c72dfc0a6896de8a0a7d2c7841cVendor (CNA)
Linux Linux79dcbd8176152b860028b62f81a635d987365752Vendor (CNA)
Linux Linux7cf6466e00a77b0a914b7b2c28a1fc7947d55e59Vendor (CNA)
Linux Linuxaefcc25f3a0cd28a87d11d41d30419a12cd26a34Vendor (CNA)
Linux Linuxbee90911e0138c76ee67458ac0d58b38a3190f65Vendor (CNA)
Linux Linuxd53456492b5d02033c73dfa0f3b94c86337791baVendor (CNA)
debian:linux5.15.15-1 · Debian:12Package registry (OSV)
suse:kernel-default3.0.101-108.156.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-default-base5.3.18-150200.24.194.1.150200.9.99.1 · SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSPackage registry (OSV)
suse:kernel-docs5.3.18-150200.24.194.1 · SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSPackage registry (OSV)
suse:kernel-ec23.0.101-108.156.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-livepatch-SLE15-SP2_Update_491-150200.5.3.1 · SUSE:Linux Enterprise Live Patching 15 SP2Package registry (OSV)
suse:kernel-obs-build5.3.18-150200.24.194.1 · SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSPackage registry (OSV)
suse:kernel-rt5.3.18-150300.172.1 · SUSE:Linux Enterprise Micro 5.1Package registry (OSV)
suse:kernel-source3.0.101-108.156.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-source-rt5.3.18-150300.172.1 · SUSE:Linux Enterprise Micro 5.1Package registry (OSV)
suse:kernel-syms3.0.101-108.156.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-trace3.0.101-108.156.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-xen3.0.101-108.156.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage 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.

No nightly-computed relations.

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).

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-401 · Missing Release of Memory after Effective Lifetime

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