NVD / CVE Program· CNA Linux

CVE-2022-49956: staging: rtl8712: fix use after free bugs

Noroxi assessment

Priority: Monitor (action score 31/100)

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 19e3f69d19801940abc2ac37c169882769ed9770, 376e15487fec837301d888068a3fcc82efb6171a, 7dce6b0ee7d78667d6c831ced957a08769973063.

Low priority for now. Upgrade to Linux Linux 19e3f69d19801940abc2ac37c169882769ed9770, 376e15487fec837301d888068a3fcc82efb6171a, 7dce6b0ee7d78667d6c831ced957a08769973063 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: staging: rtl8712: fix use after free bugs _Read/Write_MACREG callbacks are NULL so the read/write_macreg_hdl() functions don't do anything except free the "pcmd" pointer. It results in a use after free. Delete them.

HighCVSS 7.8 · v3.1—No exploit Fix available

Memory safety

Published: Jun 18, 2025
Updated: Aug 5, 2026
EPSS: 0.2% · 16th percentile
CWE: CWE-416

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 31 / 40 · 7.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

CNA vs NVD score

NVD: 7.8
CNA · Linux: 7.0; 0.8 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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.

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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 kernel2.6.37 and later · before 4.9.328
linux linux kernel4.10 and later · before 4.14.293
linux linux kernel4.15 and later · before 4.19.258
linux linux kernel4.20 and later · before 5.4.213
linux linux kernel5.5 and later · before 5.10.142
linux linux kernel5.11 and later · before 5.15.66
linux linux kernel5.16 and later · before 5.19.8
linux linux kernel6.0

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
- 2.6.37affected
- 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef and later · before 7dce6b0ee7d78667d6c831ced957a08769973063affected · git
- 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef and later · before 376e15487fec837301d888068a3fcc82efb6171aaffected · git
- 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef and later · before 9fd6170c5e2d0ccd027abe26f6f5ffc528e1bb27affected · git
- 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef and later · before d0aac7146e96bf39e79c65087d21dfa02ef8db38affected · git
- 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef and later · before 19e3f69d19801940abc2ac37c169882769ed9770affected · git
- 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef and later · before dc02aaf950015850e7589696521c7fca767cea77affected · git
- 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef and later · before b1727def850904e4b8ba384043775672841663a1affected · git
- 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef and later · before e230a4455ac3e9b112f0367d1b8e255e141afae0affected · git
- before 2.6.37not 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 6.0.2-1	6.0.2-1
SUSE:Linux Enterprise Live Patching 15 SP3	kernel-default	before 5.3.18-150300.59.211.1	5.3.18-150300.59.211.1
SUSE:Linux Enterprise Live Patching 15 SP3	kernel-livepatch-SLE15-SP3_Update_59	before 1-150300.7.3.1	1-150300.7.3.1
SUSE:Linux Enterprise Micro 5.1	kernel-rt	before 5.3.18-150300.214.1	5.3.18-150300.214.1
SUSE:Linux Enterprise Micro 5.1	kernel-source-rt	before 5.3.18-150300.214.1	5.3.18-150300.214.1
SUSE:Linux Enterprise Server 15 SP3-LTSS	kernel-64kb	before 5.3.18-150300.59.211.1	5.3.18-150300.59.211.1
SUSE:Linux Enterprise Server 15 SP3-LTSS	kernel-default-base	before 5.3.18-150300.59.211.1.150300.18.126.1	5.3.18-150300.59.211.1.150300.18.126.1
SUSE:Linux Enterprise Server 15 SP3-LTSS	kernel-docs	before 5.3.18-150300.59.211.1	5.3.18-150300.59.211.1
SUSE:Linux Enterprise Server 15 SP3-LTSS	kernel-obs-build	before 5.3.18-150300.59.212.1	5.3.18-150300.59.212.1
SUSE:Linux Enterprise Server 15 SP3-LTSS	kernel-preempt	before 5.3.18-150300.59.211.1	5.3.18-150300.59.211.1
SUSE:Linux Enterprise Server 15 SP3-LTSS	kernel-source	before 5.3.18-150300.59.211.1	5.3.18-150300.59.211.1
SUSE:Linux Enterprise Server 15 SP3-LTSS	kernel-syms	before 5.3.18-150300.59.211.1	5.3.18-150300.59.211.1
SUSE:Linux Enterprise Server 15 SP3-LTSS	kernel-zfcpdump	before 5.3.18-150300.59.211.1	5.3.18-150300.59.211.1

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-2022-49953Jun 18, 2025 · iio: light: cm3605: Fix an error handling path in cm3605_probe()
22Monitor
← EarlierCVE-2022-49954Jun 18, 2025 · Input: iforce - wake up after clearing IFORCE_XMIT_RUNNING flag
22Monitor
Later →CVE-2022-49957Jun 18, 2025 · kcm: fix strp_init() order and cleanup
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	19e3f69d19801940abc2ac37c169882769ed9770	Vendor (CNA)
Linux Linux	376e15487fec837301d888068a3fcc82efb6171a	Vendor (CNA)
Linux Linux	7dce6b0ee7d78667d6c831ced957a08769973063	Vendor (CNA)
Linux Linux	9fd6170c5e2d0ccd027abe26f6f5ffc528e1bb27	Vendor (CNA)
Linux Linux	b1727def850904e4b8ba384043775672841663a1	Vendor (CNA)
Linux Linux	d0aac7146e96bf39e79c65087d21dfa02ef8db38	Vendor (CNA)
Linux Linux	dc02aaf950015850e7589696521c7fca767cea77	Vendor (CNA)
Linux Linux	e230a4455ac3e9b112f0367d1b8e255e141afae0	Vendor (CNA)
debian:linux	6.0.2-1 · Debian:12	Package registry (OSV)
suse:kernel-64kb	5.3.18-150300.59.211.1 · SUSE:Linux Enterprise Server 15 SP3-LTSS	Package registry (OSV)
suse:kernel-default	5.3.18-150300.59.211.1 · SUSE:Linux Enterprise Live Patching 15 SP3	Package registry (OSV)
suse:kernel-default-base	5.3.18-150300.59.211.1.150300.18.126.1 · SUSE:Linux Enterprise Server 15 SP3-LTSS	Package registry (OSV)
suse:kernel-docs	5.3.18-150300.59.211.1 · SUSE:Linux Enterprise Server 15 SP3-LTSS	Package registry (OSV)
suse:kernel-livepatch-SLE15-SP3_Update_59	1-150300.7.3.1 · SUSE:Linux Enterprise Live Patching 15 SP3	Package registry (OSV)
suse:kernel-obs-build	5.3.18-150300.59.212.1 · SUSE:Linux Enterprise Server 15 SP3-LTSS	Package registry (OSV)
suse:kernel-preempt	5.3.18-150300.59.211.1 · SUSE:Linux Enterprise Server 15 SP3-LTSS	Package registry (OSV)
suse:kernel-rt	5.3.18-150300.214.1 · SUSE:Linux Enterprise Micro 5.1	Package registry (OSV)
suse:kernel-source	5.3.18-150300.59.211.1 · SUSE:Linux Enterprise Server 15 SP3-LTSS	Package registry (OSV)
suse:kernel-source-rt	5.3.18-150300.214.1 · SUSE:Linux Enterprise Micro 5.1	Package registry (OSV)
suse:kernel-syms	5.3.18-150300.59.211.1 · SUSE:Linux Enterprise Server 15 SP3-LTSS	Package registry (OSV)
suse:kernel-zfcpdump	5.3.18-150300.59.211.1 · SUSE:Linux Enterprise Server 15 SP3-LTSS	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: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
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:H/I:H/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, 10:09 PM UTC

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

References

git.kernel.org/stable/c/19e3f69d19801940abc2ac37c169882769ed9770

Show all references (7 more)

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

All records