NVD / CVE Program· CNA Linux

CVE-2022-49275: can: m_can: m_can_tx_handler(): fix use after free of skb

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: 0.28% (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 08d90846e438ac22dc56fc49ec0b0d195831c5ed, 2e8e79c416aae1de224c0f1860f2e3350fa171f8, 31417073493f302d26ab66b3abc098d43227b835.

Low priority for now. Upgrade to Linux Linux 08d90846e438ac22dc56fc49ec0b0d195831c5ed, 2e8e79c416aae1de224c0f1860f2e3350fa171f8, 31417073493f302d26ab66b3abc098d43227b835 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: can: m_can: m_can_tx_handler(): fix use after free of skb can_put_echo_skb() will clone skb then free the skb. Move the can_put_echo_skb() for the m_can version 3.0.x directly before the start of the xmit in hardware, similar to the 3.1.x branch.

HighCVSS 7.8 · v3.1—No exploit Fix available

Memory safety

Published: Feb 26, 2025
Updated: Aug 5, 2026
EPSS: 0.2% · 20th 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.

CNA vs NVD score

NVD: —
CNA · Linux: 7.8; NVD has not scored this yet; the score shown is the CNA’s.

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 kernel3.18 and later · before 4.9.324
linux linux kernel4.10 and later · before 4.14.289
linux linux kernel4.15 and later · before 4.19.253
linux linux kernel4.20 and later · before 5.4.207
linux linux kernel5.5 and later · before 5.10.110
linux linux kernel5.11 and later · before 5.15.33
linux linux kernel5.16 and later · before 5.16.19
linux linux kernel5.17 and later · before 5.17.2

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
- 3.18affected
- 80646733f11c2e9de3b6339f7e635047e6087280 and later · before d93ed9aff64968f4cdad690712eb4f48ae537bdeaffected · git
- 80646733f11c2e9de3b6339f7e635047e6087280 and later · before d3892a747ab16b1eb6593a19d29f62c3b3f020acaffected · git
- 80646733f11c2e9de3b6339f7e635047e6087280 and later · before 7728d937ec403a1ceff9483023252d2cb8777f81affected · git
- 80646733f11c2e9de3b6339f7e635047e6087280 and later · before 08d90846e438ac22dc56fc49ec0b0d195831c5edaffected · git
- 80646733f11c2e9de3b6339f7e635047e6087280 and later · before 869016a2938ac44f7b2fb7fc22c89edad99eb9b3affected · git
- 80646733f11c2e9de3b6339f7e635047e6087280 and later · before f43e64076ff1b1dcb893fb77ad1204105f710a29affected · git
- 80646733f11c2e9de3b6339f7e635047e6087280 and later · before 4db7d6f481990dd179a9ee7126dc7aa31ea4fff3affected · git
- 80646733f11c2e9de3b6339f7e635047e6087280 and later · before 31417073493f302d26ab66b3abc098d43227b835affected · git
- 80646733f11c2e9de3b6339f7e635047e6087280 and later · before 2e8e79c416aae1de224c0f1860f2e3350fa171f8affected · git

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 5.17.3-1	5.17.3-1

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-2022-49273Feb 26, 2025 · rtc: pl031: fix rtc features null pointer dereference
22Monitor
← EarlierCVE-2022-49274Feb 26, 2025 · ocfs2: fix crash when mount with quota enabled
22Monitor
Later →CVE-2022-49276Feb 26, 2025 · jffs2: fix memory leak in jffs2_scan_medium
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	08d90846e438ac22dc56fc49ec0b0d195831c5ed	Vendor (CNA)
Linux Linux	2e8e79c416aae1de224c0f1860f2e3350fa171f8	Vendor (CNA)
Linux Linux	31417073493f302d26ab66b3abc098d43227b835	Vendor (CNA)
Linux Linux	4db7d6f481990dd179a9ee7126dc7aa31ea4fff3	Vendor (CNA)
Linux Linux	7728d937ec403a1ceff9483023252d2cb8777f81	Vendor (CNA)
Linux Linux	869016a2938ac44f7b2fb7fc22c89edad99eb9b3	Vendor (CNA)
Linux Linux	d3892a747ab16b1eb6593a19d29f62c3b3f020ac	Vendor (CNA)
Linux Linux	d93ed9aff64968f4cdad690712eb4f48ae537bde	Vendor (CNA)
Linux Linux	f43e64076ff1b1dcb893fb77ad1204105f710a29	Vendor (CNA)
debian:linux	5.17.3-1 · 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: 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, 10:09 PM UTC

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

References

git.kernel.org/stable/c/08d90846e438ac22dc56fc49ec0b0d195831c5ed

Show all references (8 more)

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

All records