CVE-2021-47521

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/1a295fea90e1acbe80c6d4940f5ff856edcd6bec	Patch
https://git.kernel.org/stable/c/1dd5b819f7e406dc15bbc7670596ff25261aaa2a	Patch
https://git.kernel.org/stable/c/3ec6ca6b1a8e64389f0212b5a1b0f6fed1909e45	Patch
https://git.kernel.org/stable/c/474f9a8534f5f89841240a7e978bafd6e1e039ce	Patch
https://git.kernel.org/stable/c/923f4dc5df679f678e121c20bf2fd70f7bf3e288	Patch
https://git.kernel.org/stable/c/c8718026ba287168ff9ad0ccc4f9a413062cba36	Patch
https://git.kernel.org/stable/c/cbd86110546f7f730a1f5d7de56c944a336c15c4	Patch
https://git.kernel.org/stable/c/ccf070183e4655824936c0f96c4a2bcca93419aa	Patch

Configurations

Configuration 1 (hide)

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::::::::

History

No history.

Information

Published : 2024-05-24 15:15

Updated : 2024-06-10 18:41

NVD link : CVE-2021-47521

Mitre link : CVE-2021-47521

CVE.ORG link : CVE-2021-47521

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

{"id": "CVE-2021-47521", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2024-05-24T15:15:14.203", "references": [{"url": "https://git.kernel.org/stable/c/1a295fea90e1acbe80c6d4940f5ff856edcd6bec", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1dd5b819f7e406dc15bbc7670596ff25261aaa2a", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3ec6ca6b1a8e64389f0212b5a1b0f6fed1909e45", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/474f9a8534f5f89841240a7e978bafd6e1e039ce", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/923f4dc5df679f678e121c20bf2fd70f7bf3e288", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c8718026ba287168ff9ad0ccc4f9a413062cba36", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/cbd86110546f7f730a1f5d7de56c944a336c15c4", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ccf070183e4655824936c0f96c4a2bcca93419aa", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: sja1000: fix use after free in ems_pcmcia_add_card()\n\nIf the last channel is not available then \"dev\" is freed. Fortunately,\nwe can just use \"pdev->irq\" instead.\n\nAlso we should check if at least one channel was set up."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: sja1000: arreglar el use after free en ems_pcmcia_add_card() Si el \u00faltimo canal no est\u00e1 disponible entonces se libera \"dev\". Afortunadamente, podemos usar \"pdev->irq\" en su lugar. Tambi\u00e9n debemos comprobar si se configur\u00f3 al menos un canal."}], "lastModified": "2024-06-10T18:41:35.017", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E8A4BCFB-2E82-46CF-9D84-81F454F3C1BC", "versionEndExcluding": "4.4.295", "versionStartIncluding": "3.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5D107324-F4B9-4146-BACC-391E95D41D67", "versionEndExcluding": "4.9.293", "versionStartIncluding": "4.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "71B2A056-7541-4FF3-859E-C55955DDA2DD", "versionEndExcluding": "4.14.258", "versionStartIncluding": "4.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CECDDE2F-DEEF-4D3A-85FF-6AEBA16D225B", "versionEndExcluding": "4.19.221", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B1DD3148-41FC-42AC-96A5-F63D774A97A3", "versionEndExcluding": "5.4.165", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D9668578-08F7-4694-A86F-FCE448387A79", "versionEndExcluding": "5.10.85", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6664ACE2-F748-4AE5-B98B-58803B0B2C3E", "versionEndExcluding": "5.15.8", "versionStartIncluding": "5.11"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}