In the Linux kernel, the following vulnerability has been resolved:

can: sja1000: fix use after free in ems_pcmcia_add_card()

If the last channel is not available then "dev" is freed. Fortunately,
we can just use "pdev->irq" instead.

Also we should check if at least one channel was set up.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00018.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
fd734c6f25aea4b2b44b045e489aec67b388577e affected
< cbd86110546f7f730a1f5d7de56c944a336c15c4
fd734c6f25aea4b2b44b045e489aec67b388577e affected
< 1dd5b819f7e406dc15bbc7670596ff25261aaa2a
fd734c6f25aea4b2b44b045e489aec67b388577e affected
< c8718026ba287168ff9ad0ccc4f9a413062cba36
fd734c6f25aea4b2b44b045e489aec67b388577e affected
< ccf070183e4655824936c0f96c4a2bcca93419aa
fd734c6f25aea4b2b44b045e489aec67b388577e affected
< 1a295fea90e1acbe80c6d4940f5ff856edcd6bec
fd734c6f25aea4b2b44b045e489aec67b388577e affected
< 923f4dc5df679f678e121c20bf2fd70f7bf3e288
fd734c6f25aea4b2b44b045e489aec67b388577e affected
< 474f9a8534f5f89841240a7e978bafd6e1e039ce
fd734c6f25aea4b2b44b045e489aec67b388577e affected
< 3ec6ca6b1a8e64389f0212b5a1b0f6fed1909e45
Linux Linux affected
Version Status Constraints
3.2 affected
—
0 unaffected
< 3.2
4.4.295 unaffected
≤ 4.4.*
4.9.293 unaffected
≤ 4.9.*
4.14.258 unaffected
≤ 4.14.*
4.19.221 unaffected
≤ 4.19.*
5.4.165 unaffected
≤ 5.4.*
5.10.85 unaffected
≤ 5.10.*
5.15.8 unaffected
≤ 5.15.*
5.16 unaffected
≤ *

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

No data.

No data.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/1a295fea90e1acbe80c6d4940f5ff856edcd6bec cve-icon cve-icon
https://git.kernel.org/stable/c/1dd5b819f7e406dc15bbc7670596ff25261aaa2a cve-icon cve-icon
https://git.kernel.org/stable/c/3ec6ca6b1a8e64389f0212b5a1b0f6fed1909e45 cve-icon cve-icon
https://git.kernel.org/stable/c/474f9a8534f5f89841240a7e978bafd6e1e039ce cve-icon cve-icon
https://git.kernel.org/stable/c/923f4dc5df679f678e121c20bf2fd70f7bf3e288 cve-icon cve-icon
https://git.kernel.org/stable/c/c8718026ba287168ff9ad0ccc4f9a413062cba36 cve-icon cve-icon
https://git.kernel.org/stable/c/cbd86110546f7f730a1f5d7de56c944a336c15c4 cve-icon cve-icon
https://git.kernel.org/stable/c/ccf070183e4655824936c0f96c4a2bcca93419aa cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2024052433-CVE-2021-47521-8637@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2021-47521 cve-icon
https://www.cve.org/CVERecord?id=CVE-2021-47521 cve-icon
History

Mon, 04 Nov 2024 12:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-05-04T07:12:46.673Z

Reserved: 2024-05-24T15:02:54.825Z

Link: CVE-2021-47521

cve-icon Vulnrichment

Updated: 2024-08-04T05:39:59.801Z

cve-icon NVD

Status : Modified

Published: 2024-05-24T15:15:14.203

Modified: 2024-11-21T06:36:26.170

Link: CVE-2021-47521

cve-icon Redhat

Severity : Low

Publid Date: 2024-05-24T00:00:00Z

Links: CVE-2021-47521 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses