CVE-2022-49685· NVD / CVE Program· CNA Linux

iio: trigger: sysfs: fix use-after-free on remove

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: 0.27% (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 31ff3309b47d98313c61b8301bf595820cc3cc33, 4687c3f955240ca2a576bdc3f742d4d915b6272d, 4ef1e521be610b720daeb7cf899fedc7db0274c4.

Low priority for now. Upgrade to Linux Linux 31ff3309b47d98313c61b8301bf595820cc3cc33, 4687c3f955240ca2a576bdc3f742d4d915b6272d, 4ef1e521be610b720daeb7cf899fedc7db0274c4 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: iio: trigger: sysfs: fix use-after-free on remove Ensure that the irq_work has completed before the trigger is freed. ================================================================== BUG: KASAN: use-after-free in irq_work_run_list Read of size 8 at addr 0000000064702248 by task python3/25 Call Trace: irq_work_run_list irq_work_tick update_process_times tick_sched_handle tick_sched_timer __hrtimer_run_queues hrtimer_interrupt Allocated by task 25: kmem_cache_alloc_trace iio_sysfs_trig_add dev_attr_store sysfs_kf_write kernfs_fop_write_iter new_sync_write vfs_write ksys_write sys_write Freed by task 25: kfree iio_sysfs_trig_remove dev_attr_store sysfs_kf_write kernfs_fop_write_iter new_sync_write vfs_write ksys_write sys_write ==================================================================

HighCVSS 7.8 · v3.1—No exploit Fix available

Memory safety

BDU:2025-04472

Published: Feb 26, 2025
Updated: Jun 17, 2026
EPSS: 0.2% · 19th percentile
CWE: CWE-416

Report tools

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Action score

Monitor

Low priority for now.

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

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

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

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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 kernel3.7 and later · before 4.9.321
linux linux kernel4.10 and later · before 4.14.286
linux linux kernel4.15 and later · before 4.19.250
linux linux kernel4.20 and later · before 5.4.202
linux linux kernel5.5 and later · before 5.10.127
linux linux kernel5.11 and later · before 5.15.51
linux linux kernel5.16 and later · before 5.18.8
linux linux kernel5.19

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
- 3.7affected
- f38bc926d022ebd67baad6ac7fc22c95fbc6238c and later · before d6111e7bdb8ec27eb43d01c4cd4ff1620a75f7f2affected · git
- f38bc926d022ebd67baad6ac7fc22c95fbc6238c and later · before fd5d8fb298a2866c337da635c79d63c3afabcaf7affected · git
- f38bc926d022ebd67baad6ac7fc22c95fbc6238c and later · before 31ff3309b47d98313c61b8301bf595820cc3cc33affected · git
- f38bc926d022ebd67baad6ac7fc22c95fbc6238c and later · before 5e39397d60dacc7f5d81d442c1c958eaaaf31128affected · git
- f38bc926d022ebd67baad6ac7fc22c95fbc6238c and later · before b07a30a774b3c3e584a68dc91779c68ea2da4813affected · git
- f38bc926d022ebd67baad6ac7fc22c95fbc6238c and later · before 4687c3f955240ca2a576bdc3f742d4d915b6272daffected · git
- f38bc926d022ebd67baad6ac7fc22c95fbc6238c and later · before 4ef1e521be610b720daeb7cf899fedc7db0274c4affected · git
- f38bc926d022ebd67baad6ac7fc22c95fbc6238c and later · before 78601726d4a59a291acc5a52da1d3a0a6831e4e8affected · git
- before 3.7not 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 5.18.14-1	5.18.14-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

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
CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
83Now

Published before and after this one in the same product

← EarlierCVE-2022-49683Feb 26, 2025 · iio: adc: adi-axi-adc: Fix refcount leak in adi_axi_adc_attach_client
22Monitor
← EarlierCVE-2022-49684Feb 26, 2025 · iio: adc: aspeed: Fix refcount leak in aspeed_adc_set_trim_data
22Monitor
Later →CVE-2022-49686Feb 26, 2025 · usb: gadget: uvc: fix list double add in uvcg_video_pump
31Monitor

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	31ff3309b47d98313c61b8301bf595820cc3cc33	Vendor (CNA)
Linux Linux	4687c3f955240ca2a576bdc3f742d4d915b6272d	Vendor (CNA)
Linux Linux	4ef1e521be610b720daeb7cf899fedc7db0274c4	Vendor (CNA)
Linux Linux	5e39397d60dacc7f5d81d442c1c958eaaaf31128	Vendor (CNA)
Linux Linux	78601726d4a59a291acc5a52da1d3a0a6831e4e8	Vendor (CNA)
Linux Linux	b07a30a774b3c3e584a68dc91779c68ea2da4813	Vendor (CNA)
Linux Linux	d6111e7bdb8ec27eb43d01c4cd4ff1620a75f7f2	Vendor (CNA)
Linux Linux	fd5d8fb298a2866c337da635c79d63c3afabcaf7	Vendor (CNA)
debian:linux	5.18.14-1 · 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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-secondary

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, 10:11 PM UTC

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

References

git.kernel.org/stable/c/31ff3309b47d98313c61b8301bf595820cc3cc33

Show all references (7 more)

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

All records