NVD / CVE Program· CNA Linux

CVE-2024-50059: ntb: ntb_hw_switchtec: Fix use after free vulnerability in switchtec_ntb_remove due to race condition

HighCVSS 7.0 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 28/100)

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: 0.23% (FIRST EPSS).
Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
Fixed version: Linux Linux 177925d9c8715a897bb79eca62628862213ba956, 3ae45be8492460a35b5aebf6acac1f1d32708946, 5126d8f5567f49b52e21fca320eaa97977055099; azl3 kernel 6.6.56.1-5 on Azure Linux 3.0 6.6.57.1-1; azl3 kernel 6.6.57.1-1 on Azure Linux 3.0 6.6.57.1-1.

Low priority for now. Upgrade to Linux Linux 177925d9c8715a897bb79eca62628862213ba956, 3ae45be8492460a35b5aebf6acac1f1d32708946, 5126d8f5567f49b52e21fca320eaa97977055099; azl3 kernel 6.6.56.1-5 on Azure Linux 3.0 6.6.57.1-1; azl3 kernel 6.6.57.1-1 on Azure Linux 3.0 6.6.57.1-1 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: ntb: ntb_hw_switchtec: Fix use after free vulnerability in switchtec_ntb_remove due to race condition In the switchtec_ntb_add function, it can call switchtec_ntb_init_sndev function, then &sndev->check_link_status_work is bound with check_link_status_work. switchtec_ntb_link_notification may be called to start the work. If we remove the module which will call switchtec_ntb_remove to make cleanup, it will free sndev through kfree(sndev), while the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows: CPU0 CPU1 | check_link_status_work switchtec_ntb_remove | kfree(sndev); | | if (sndev->link_force_down) | // use sndev Fix it by ensuring that the work is canceled before proceeding with the cleanup in switchtec_ntb_remove.

BDU:2024-08977

Published: Oct 21, 2024
Updated: Aug 5, 2026
EPSS: 0.2% · 14th percentile
CWE: CWE-416

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 28 / 40 · 7.0 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 7.0
CNA · Linux: 7.8; 0.8 point gap

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

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.

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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

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
- 4.16affected
- d04be142b8b61ffb3c9cc5c6d1abda8fc59a16c9 and later · before 5126d8f5567f49b52e21fca320eaa97977055099affected · git
- d04be142b8b61ffb3c9cc5c6d1abda8fc59a16c9 and later · before b650189687822b705711f0567a65a164a314d8dfaffected · git
- d04be142b8b61ffb3c9cc5c6d1abda8fc59a16c9 and later · before 92728fceefdaa2a0a3aae675f86193b006eeaa43affected · git
- d04be142b8b61ffb3c9cc5c6d1abda8fc59a16c9 and later · before 3ae45be8492460a35b5aebf6acac1f1d32708946affected · git
- d04be142b8b61ffb3c9cc5c6d1abda8fc59a16c9 and later · before fa840ba4bd9f3bad7f104e5b32028ee73af8b3ddaffected · git
- d04be142b8b61ffb3c9cc5c6d1abda8fc59a16c9 and later · before 177925d9c8715a897bb79eca62628862213ba956affected · git
- d04be142b8b61ffb3c9cc5c6d1abda8fc59a16c9 and later · before e51aded92d42784313ba16c12f4f88cc4f973bbbaffected · git
- before 4.16not affected · semver
- 5.4.285 and later · up to and including 5.4.*not affected · semver

Affected versions · NVD (5)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

linux linux kernelbefore 5.10.227
linux linux kernel5.11 and later · before 5.15.168
linux linux kernel5.16 and later · before 6.1.113
linux linux kernel6.2 and later · before 6.6.57
linux linux kernel6.7 and later · before 6.11.4

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 6.1.115-1	6.1.115-1
Debian:13	linux	before 6.11.4-1	6.11.4-1

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-2024-50056Oct 21, 2024 · usb: gadget: uvc: Fix ERR_PTR dereference in uvc_v4l2.c
22Monitor
← EarlierCVE-2024-50057Oct 21, 2024 · usb: typec: tipd: Free IRQ only if it was requested before
13Monitor
Later →CVE-2024-50060Oct 21, 2024 · io_uring: check if we need to reschedule during overflow flush
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	177925d9c8715a897bb79eca62628862213ba956	Vendor (CNA)
Linux Linux	3ae45be8492460a35b5aebf6acac1f1d32708946	Vendor (CNA)
Linux Linux	5126d8f5567f49b52e21fca320eaa97977055099	Vendor (CNA)
Linux Linux	92728fceefdaa2a0a3aae675f86193b006eeaa43	Vendor (CNA)
Linux Linux	b650189687822b705711f0567a65a164a314d8df	Vendor (CNA)
Linux Linux	e51aded92d42784313ba16c12f4f88cc4f973bbb	Vendor (CNA)
Linux Linux	fa840ba4bd9f3bad7f104e5b32028ee73af8b3dd	Vendor (CNA)
azl3 kernel 6.6.56.1-5 on Azure Linux 3.0	6.6.57.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
azl3 kernel 6.6.57.1-1 on Azure Linux 3.0	6.6.57.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
cbl2 kernel 5.15.167.1-2 on CBL Mariner 2.0	5.15.173.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
cbl2 kernel 5.15.167.1-2 on CBL-Mariner 2.0	5.15.173.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
cbl2 kernel 5.15.173.1-1 on CBL Mariner 2.0	5.15.173.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
debian:linux	6.1.115-1 · 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.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

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.
Special conditions such as timing or configuration are required.

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: High
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:H/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 (1)

Fix✗ → ✓Sep 28, 2026, 10:09 PM UTC

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

References

git.kernel.org/stable/c/177925d9c8715a897bb79eca62628862213ba956

Show all references (8 more)

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

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