NVD / CVE Program· CNA Linux

CVE-2022-49849: btrfs: fix match incorrectly in dev_args_match_device

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: 0.20% (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 0fca385d6ebc3cabb20f67bcf8a71f1448bdc001, 5.15.79, bc6c127c377010f136360552ebf91c2723081c1b.

Low priority for now. Upgrade to Linux Linux 0fca385d6ebc3cabb20f67bcf8a71f1448bdc001, 5.15.79, bc6c127c377010f136360552ebf91c2723081c1b 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: btrfs: fix match incorrectly in dev_args_match_device syzkaller found a failed assertion: assertion failed: (args->devid != (u64)-1) || args->missing, in fs/btrfs/volumes.c:6921 This can be triggered when we set devid to (u64)-1 by ioctl. In this case, the match of devid will be skipped and the match of device may succeed incorrectly. Patch 562d7b1512f7 introduced this function which is used to match device. This function contains two matching scenarios, we can distinguish them by checking the value of args->missing rather than check whether args->devid and args->uuid is default value.

MediumCVSS 5.5 · v3.1—No exploit Fix available

Denial of service

Published: May 1, 2025
Updated: Jun 17, 2026
EPSS: 0.2% · 10th percentile
CWE: —

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 22 / 40 · 5.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

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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 kernel5.15.54 and later · before 5.15.79
linux linux kernel5.16 and later · before 6.0.9
linux linux kernel6.1

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
- 5.16affected
- 5578b681fbf2b22d61189a2539efd3009518b328 and later · before c9fe4719c662e0af17eea723cf345e37719fd3c9affected · git
- 562d7b1512f7369a19bca2883e2e8672d78f0481 and later · before bc6c127c377010f136360552ebf91c2723081c1baffected · git
- 562d7b1512f7369a19bca2883e2e8672d78f0481 and later · before 0fca385d6ebc3cabb20f67bcf8a71f1448bdc001affected · git
- 5.15.54 and later · before 5.15.79affected · semver
- before 5.16not affected · semver
- 5.15.79 and later · up to and including 5.15.*not affected · semver
- 6.0.9 and later · up to and including 6.0.*not affected · semver
- 6.1 and laternot affected · original_commit_for_fix

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 6.0.10-1	6.0.10-1

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
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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-2022-49847May 1, 2025 · net: ethernet: ti: am65-cpsw: Fix segmentation fault at module unload
22Monitor
← EarlierCVE-2022-49848May 1, 2025 · phy: qcom-qmp-combo: fix NULL-deref on runtime resume
22Monitor
Later →CVE-2022-49850May 1, 2025 · nilfs2: fix deadlock in nilfs_count_free_blocks()
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	0fca385d6ebc3cabb20f67bcf8a71f1448bdc001	Vendor (CNA)
Linux Linux	5.15.79	Vendor (CNA)
Linux Linux	bc6c127c377010f136360552ebf91c2723081c1b	Vendor (CNA)
Linux Linux	c9fe4719c662e0af17eea723cf345e37719fd3c9	Vendor (CNA)
debian:linux	6.0.10-1 · 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).

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)

—

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

Fix✗ → ✓Sep 28, 2026, 10:11 PM UTC

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

References

git.kernel.org/stable/c/0fca385d6ebc3cabb20f67bcf8a71f1448bdc001

Show all references (2 more)

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

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