NVD / CVE Program· CNA Linux

CVE-2026-53112: wifi: rtlwifi: pci: fix possible use-after-free caused by unfinished irq_prepare_bcn_tasklet

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: 0.17% (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 008c456b76e9070979bc0e763897a5d3b0fdd4dc, 039cd522dc70151da13329a5e3ae19b1736f468a, 3c0e8a3179e6325a7dc6ce221aef0e03d854ab4b; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.143.1-1.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 008c456b76e9070979bc0e763897a5d3b0fdd4dc, 039cd522dc70151da13329a5e3ae19b1736f468a, 3c0e8a3179e6325a7dc6ce221aef0e03d854ab4b; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.143.1-1 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: wifi: rtlwifi: pci: fix possible use-after-free caused by unfinished irq_prepare_bcn_tasklet The irq_prepare_bcn_tasklet is initialized in rtl_pci_init() and scheduled when RTL_IMR_BCNINT interrupt is triggered by hardware. But it is never killed in rtl_pci_deinit(). When the rtlwifi card probe fails or is being detached, the ieee80211_hw is deallocated. However, irq_prepare_bcn_tasklet may still be running or pending, leading to use-after-free when the freed ieee80211_hw is accessed in _rtl_pci_prepare_bcn_tasklet(). Similar to irq_tasklet, add tasklet_kill() in rtl_pci_deinit() to ensure that irq_prepare_bcn_tasklet is properly terminated before the ieee80211_hw is released. The issue was identified through static analysis.

HighCVSS 7.8 · v3.1—No exploit Fix available

Memory safety

Published: Jun 24, 2026
Updated: Jul 23, 2026
EPSS: 0.1% · 6th 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 · 0.1%

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

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

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

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.

We use this product, ask for help

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 kernel2.6.38 and later · before 5.10.258
linux linux kernel5.11 and later · before 5.15.209
linux linux kernel5.16 and later · before 6.1.175
linux linux kernel6.2 and later · before 6.6.141
linux linux kernel6.7 and later · before 6.12.91
linux linux kernel6.13 and later · before 6.18.33
linux linux kernel6.19 and later · before 7.0.10

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
- 2.6.38affected
- 0c8173385e549f95cd80c3fff5aab87b4f881d8d and later · before ae10d4a1ab6bcaa1336abb171908a9a365761d3eaffected · git
- 0c8173385e549f95cd80c3fff5aab87b4f881d8d and later · before fac1079e0fdec6df6d7562c21941587236dc3defaffected · git
- 0c8173385e549f95cd80c3fff5aab87b4f881d8d and later · before e40873820c9d245ce482faa7ad514ebdb3b8d23daffected · git
- 0c8173385e549f95cd80c3fff5aab87b4f881d8d and later · before 008c456b76e9070979bc0e763897a5d3b0fdd4dcaffected · git
- 0c8173385e549f95cd80c3fff5aab87b4f881d8d and later · before 7731b67bd59d1284d150cbe40a47e95a10613234affected · git
- 0c8173385e549f95cd80c3fff5aab87b4f881d8d and later · before aa10a452e34810987fb9f4a047995b30003fb53faffected · git
- 0c8173385e549f95cd80c3fff5aab87b4f881d8d and later · before 3c0e8a3179e6325a7dc6ce221aef0e03d854ab4baffected · git
- 0c8173385e549f95cd80c3fff5aab87b4f881d8d and later · before 039cd522dc70151da13329a5e3ae19b1736f468aaffected · git
- before 2.6.38not 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 6.1.176-1	6.1.176-1
Debian:13	linux	before 6.12.94-1	6.12.94-1
Debian:14	linux	before 7.0.10-1	7.0.10-1

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-2026-53107Jun 24, 2026 · wifi: libertas: don't kill URBs in interrupt context
22Monitor
← EarlierCVE-2026-53111Jun 24, 2026 · bpf: test_run: Fix the null pointer dereference issue in bpf_lwt_xmit_push_encap
22Monitor
Later →CVE-2026-53114Jun 24, 2026 · perf/amd/ibs: Avoid calling perf_allow_kernel() from the IBS NMI handler
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	008c456b76e9070979bc0e763897a5d3b0fdd4dc	Vendor (CNA)
Linux Linux	039cd522dc70151da13329a5e3ae19b1736f468a	Vendor (CNA)
Linux Linux	3c0e8a3179e6325a7dc6ce221aef0e03d854ab4b	Vendor (CNA)
Linux Linux	7731b67bd59d1284d150cbe40a47e95a10613234	Vendor (CNA)
Linux Linux	aa10a452e34810987fb9f4a047995b30003fb53f	Vendor (CNA)
Linux Linux	ae10d4a1ab6bcaa1336abb171908a9a365761d3e	Vendor (CNA)
Linux Linux	e40873820c9d245ce482faa7ad514ebdb3b8d23d	Vendor (CNA)
Linux Linux	fac1079e0fdec6df6d7562c21941587236dc3def	Vendor (CNA)
azl3 kernel 6.6.139.1-1 on Azure Linux 3.0	6.6.143.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
debian:linux	6.1.176-1 · Debian:12	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).

National notice (Türkiye Cybersecurity Directorate / USOM)

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

TR-26-0440 · Jun 25, 2026(Linux Kernel Güvenlik Bildirimi)

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: 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/008c456b76e9070979bc0e763897a5d3b0fdd4dc

Show all references (7 more)

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

All records