NVD / CVE Program· CNA Linux

CVE-2024-50280: dm cache: fix flushing uninitialized delayed_work on cache_ctr error

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: 0.25% (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 135496c208ba26fd68cdef10b64ed7a91ac9a7ff, 4.10, 4.15.

Low priority for now. Upgrade to Linux Linux 135496c208ba26fd68cdef10b64ed7a91ac9a7ff, 4.10, 4.15 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: dm cache: fix flushing uninitialized delayed_work on cache_ctr error An unexpected WARN_ON from flush_work() may occur when cache creation fails, caused by destroying the uninitialized delayed_work waker in the error path of cache_create(). For example, the warning appears on the superblock checksum error. Reproduce steps: dmsetup create cmeta --table "0 8192 linear /dev/sdc 0" dmsetup create cdata --table "0 65536 linear /dev/sdc 8192" dmsetup create corig --table "0 524288 linear /dev/sdc 262144" dd if=/dev/urandom of=/dev/mapper/cmeta bs=4k count=1 oflag=direct dmsetup create cache --table "0 524288 cache /dev/mapper/cmeta \ /dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0" Kernel logs: (snip) WARNING: CPU: 0 PID: 84 at kernel/workqueue.c:4178 __flush_work+0x5d4/0x890 Fix by pulling out the cancel_delayed_work_sync() from the constructor's error path. This patch doesn't affect the use-after-free fix for concurrent dm_resume and dm_destroy (commit 6a459d8edbdb ("dm cache: Fix UAF in destroy()")) as cache_dtr is not changed.

HighCVSS 7.8 · v3.1—No exploit Fix available

Memory safety

BDU:2025-00065

Published: Nov 18, 2024
Updated: Jun 17, 2026
EPSS: 0.2% · 16th 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.

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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?

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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 kernel4.9.337 and later · before 4.10
linux linux kernel4.14.303 and later · before 4.15
linux linux kernel4.19.270 and later · before 4.20
linux linux kernel5.4.229 and later · before 5.5
linux linux kernel5.10.163 and later · before 5.11
linux linux kernel5.15.87 and later · before 5.16
linux linux kernel6.0.18 and later · before 6.1
linux linux kernel6.1.4 and later · before 6.1.117
linux linux kernel6.2 and later · before 6.6.61
linux linux kernel6.7 and later · before 6.11.8
linux linux kernel6.12

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
- 034cbc8d3b47a56acd89453c29632a9c117de09d, 993406104d2b28fe470126a062ad37a1e21e792e, 4d20032dd90664de09f2902a7ea49ae2f7771746, 2f097dfac7579fd84ff98eb1d3acd41d53a485f3, 6ac4f36910764cb510bafc4c3768544f86ca48ca, 6.2affected
- 2b17026685a270b2beaf1cdd9857fcedd3505c7e and later · before 40fac0271c7aedf60d81ed8214e80851e5b26312affected · git
- d2a0b298ebf83ab6236f66788a3541e91ce75a70 and later · before d154b333a5667b6c1b213a11a41ad7aaccd10c3daffected · git
- 6a3e412c2ab131c54945327a7676b006f000a209 and later · before 5a754d3c771280f2d06bf8ab716d6a0d36ca256eaffected · git
- 6a459d8edbdbe7b24db42a5a9f21e6aa9e00c2aa and later · before 8cc12dab635333c4ea28e72d7b947be7d0543c2caffected · git
- 6a459d8edbdbe7b24db42a5a9f21e6aa9e00c2aa and later · before aee3ecda73ce13af7c3e556383342b57e6bd0718affected · git
- 6a459d8edbdbe7b24db42a5a9f21e6aa9e00c2aa and later · before 135496c208ba26fd68cdef10b64ed7a91ac9a7ffaffected · git
- 5.10.163 and later · before 5.10.237affected · semver
- 5.15.87 and later · before 5.15.181affected · semver
- 6.1.4 and later · before 6.1.117affected · 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 6.1.119-1	6.1.119-1
Debian:13	linux	before 6.11.9-1	6.11.9-1

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
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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-2024-50278Nov 18, 2024 · dm cache: fix potential out-of-bounds access on the first resume
28Monitor
← EarlierCVE-2024-50279Nov 18, 2024 · dm cache: fix out-of-bounds access to the dirty bitset when resizing
28Monitor
Later →CVE-2024-50281Nov 18, 2024 · KEYS: trusted: dcp: fix NULL dereference in AEAD crypto operation
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	135496c208ba26fd68cdef10b64ed7a91ac9a7ff	Vendor (CNA)
Linux Linux	4.10	Vendor (CNA)
Linux Linux	4.15	Vendor (CNA)
Linux Linux	4.20	Vendor (CNA)
Linux Linux	40fac0271c7aedf60d81ed8214e80851e5b26312	Vendor (CNA)
Linux Linux	5.10.237	Vendor (CNA)
Linux Linux	5.15.181	Vendor (CNA)
Linux Linux	5.5	Vendor (CNA)
Linux Linux	5a754d3c771280f2d06bf8ab716d6a0d36ca256e	Vendor (CNA)
Linux Linux	6.1	Vendor (CNA)
Linux Linux	6.1.117	Vendor (CNA)
Linux Linux	8cc12dab635333c4ea28e72d7b947be7d0543c2c	Vendor (CNA)
Linux Linux	aee3ecda73ce13af7c3e556383342b57e6bd0718	Vendor (CNA)
Linux Linux	d154b333a5667b6c1b213a11a41ad7aaccd10c3d	Vendor (CNA)
debian:linux	6.1.119-1 · 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/135496c208ba26fd68cdef10b64ed7a91ac9a7ff

Show all references (7 more)

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

All records