NVD / CVE Program· CNA Linux

CVE-2022-50288: qlcnic: prevent ->dcb use-after-free on qlcnic_dcb_enable() failure

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: 0.16% (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 13a7c8964afcd8ca43c0b6001ebb0127baa95362, 36999236f0b12d5de21a6f40e93b570727b9ceb2, 513787ff9a331b461115e8a145a983d650a84fcb.

Low priority for now. Upgrade to Linux Linux 13a7c8964afcd8ca43c0b6001ebb0127baa95362, 36999236f0b12d5de21a6f40e93b570727b9ceb2, 513787ff9a331b461115e8a145a983d650a84fcb 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: qlcnic: prevent ->dcb use-after-free on qlcnic_dcb_enable() failure adapter->dcb would get silently freed inside qlcnic_dcb_enable() in case qlcnic_dcb_attach() would return an error, which always happens under OOM conditions. This would lead to use-after-free because both of the existing callers invoke qlcnic_dcb_get_info() on the obtained pointer, which is potentially freed at that point. Propagate errors from qlcnic_dcb_enable(), and instead free the dcb pointer at callsite using qlcnic_dcb_free(). This also removes the now unused qlcnic_clear_dcb_ops() helper, which was a simple wrapper around kfree() also causing memory leaks for partially initialized dcb. Found by Linux Verification Center (linuxtesting.org) with the SVACE static analysis tool.

MediumCVSS 5.5 · v3.1—No exploit Fix available

Published: Sep 15, 2025
Updated: Jun 17, 2026
EPSS: 0.1% · 5th percentile
CWE: CWE-416

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 22 / 40 · 5.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.1%

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

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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.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

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

linux linux kernel3.14 and later · before 4.14.303
linux linux kernel4.15 and later · before 4.19.270
linux linux kernel4.20 and later · before 5.4.229
linux linux kernel5.5 and later · before 5.10.163
linux linux kernel5.11 and later · before 5.15.87
linux linux kernel5.16 and later · before 6.0.19
linux linux kernel6.1 and later · before 6.1.5
linux linux kernel6.2

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
- 3.14affected
- 3c44bba1d270cb1620b4fe76786d0968118cb86b and later · before 36999236f0b12d5de21a6f40e93b570727b9ceb2affected · git
- 3c44bba1d270cb1620b4fe76786d0968118cb86b and later · before d12a7510293d3370b234b0b7c5eda33e58786768affected · git
- 3c44bba1d270cb1620b4fe76786d0968118cb86b and later · before 8f97eeb02a553cdc78c83a0596448a370e1518c4affected · git
- 3c44bba1d270cb1620b4fe76786d0968118cb86b and later · before 513787ff9a331b461115e8a145a983d650a84fcbaffected · git
- 3c44bba1d270cb1620b4fe76786d0968118cb86b and later · before 95df720e64a6409d8152827a776c43f615e3321aaffected · git
- 3c44bba1d270cb1620b4fe76786d0968118cb86b and later · before 8df1dc04ce0e4c03b51a756749c250a9cb17d707affected · git
- 3c44bba1d270cb1620b4fe76786d0968118cb86b and later · before a2a694e6edbdb3efb34e1613a31fdcf6cf444a55affected · git
- 3c44bba1d270cb1620b4fe76786d0968118cb86b and later · before 13a7c8964afcd8ca43c0b6001ebb0127baa95362affected · git
- before 3.14not affected · semver

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 6.1.7-1	6.1.7-1
SUSE:Linux Enterprise Live Patching 12 SP5	kernel-default	before 4.12.14-122.275.1	4.12.14-122.275.1
SUSE:Linux Enterprise Live Patching 12 SP5	kgraft-patch-SLE12-SP5_Update_73	before 1-8.3.1	1-8.3.1
SUSE:Linux Enterprise Server 12 SP5-LTSS	kernel-source	before 4.12.14-122.275.1	4.12.14-122.275.1
SUSE:Linux Enterprise Server 12 SP5-LTSS	kernel-syms	before 4.12.14-122.275.1	4.12.14-122.275.1

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
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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-2022-50284Sep 15, 2025 · ipc: fix memory leak in init_mqueue_fs()
22Monitor
← EarlierCVE-2022-50286Sep 15, 2025 · ext4: fix delayed allocation bug in ext4_clu_mapped for bigalloc + inline
22Monitor
Later →CVE-2022-50289Sep 15, 2025 · ocfs2: fix memory leak in ocfs2_stack_glue_init()
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 / package	Fixed version	Source
Linux Linux	13a7c8964afcd8ca43c0b6001ebb0127baa95362	Vendor (CNA)
Linux Linux	36999236f0b12d5de21a6f40e93b570727b9ceb2	Vendor (CNA)
Linux Linux	513787ff9a331b461115e8a145a983d650a84fcb	Vendor (CNA)
Linux Linux	8df1dc04ce0e4c03b51a756749c250a9cb17d707	Vendor (CNA)
Linux Linux	8f97eeb02a553cdc78c83a0596448a370e1518c4	Vendor (CNA)
Linux Linux	95df720e64a6409d8152827a776c43f615e3321a	Vendor (CNA)
Linux Linux	a2a694e6edbdb3efb34e1613a31fdcf6cf444a55	Vendor (CNA)
Linux Linux	d12a7510293d3370b234b0b7c5eda33e58786768	Vendor (CNA)
debian:linux	6.1.7-1 · Debian:12	Package registry (OSV)
suse:kernel-default	4.12.14-122.275.1 · SUSE:Linux Enterprise Live Patching 12 SP5	Package registry (OSV)
suse:kernel-source	4.12.14-122.275.1 · SUSE:Linux Enterprise Server 12 SP5-LTSS	Package registry (OSV)
suse:kernel-syms	4.12.14-122.275.1 · SUSE:Linux Enterprise Server 12 SP5-LTSS	Package registry (OSV)
suse:kgraft-patch-SLE12-SP5_Update_73	1-8.3.1 · SUSE:Linux Enterprise Live Patching 12 SP5	Package 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-416 · Use After Free

CVSS vector

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

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

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

Fix✗ → ✓Sep 28, 2026, 10:10 PM UTC

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

References

git.kernel.org/stable/c/13a7c8964afcd8ca43c0b6001ebb0127baa95362

Show all references (7 more)

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

All records