7.8

CVE-2021-47521

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

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.2 < 4.4.295
Linux ≫ Linux Kernel Version >= 4.5 < 4.9.293
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.258
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.221
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.165
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.85
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.8
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.24% 0.151
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

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