Vulnerability Details CVE-2022-50421
In the Linux kernel, the following vulnerability has been resolved:
rpmsg: char: Avoid double destroy of default endpoint
The rpmsg_dev_remove() in rpmsg_core is the place for releasing
this default endpoint.
So need to avoid destroying the default endpoint in
rpmsg_chrdev_eptdev_destroy(), this should be the same as
rpmsg_eptdev_release(). Otherwise there will be double destroy
issue that ept->refcount report warning:
refcount_t: underflow; use-after-free.
Call trace:
refcount_warn_saturate+0xf8/0x150
virtio_rpmsg_destroy_ept+0xd4/0xec
rpmsg_dev_remove+0x60/0x70
The issue can be reproduced by stopping remoteproc before
closing the /dev/rpmsgX.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 3.6%
CVSS Severity
CVSS v3 Score 7.8
References
Products affected by CVE-2022-50421
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cpe:2.3:o:linux:linux_kernel:5.18
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cpe:2.3:o:linux:linux_kernel:5.18.1
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cpe:2.3:o:linux:linux_kernel:5.18.10
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cpe:2.3:o:linux:linux_kernel:5.18.11
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cpe:2.3:o:linux:linux_kernel:5.18.12
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cpe:2.3:o:linux:linux_kernel:5.18.13
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cpe:2.3:o:linux:linux_kernel:5.18.14
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cpe:2.3:o:linux:linux_kernel:5.18.15
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cpe:2.3:o:linux:linux_kernel:5.18.16
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cpe:2.3:o:linux:linux_kernel:5.18.17
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cpe:2.3:o:linux:linux_kernel:5.18.18
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cpe:2.3:o:linux:linux_kernel:5.18.19
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cpe:2.3:o:linux:linux_kernel:5.18.2
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cpe:2.3:o:linux:linux_kernel:5.18.3
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cpe:2.3:o:linux:linux_kernel:5.18.4
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cpe:2.3:o:linux:linux_kernel:5.18.5
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cpe:2.3:o:linux:linux_kernel:5.18.6
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cpe:2.3:o:linux:linux_kernel:5.18.7
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cpe:2.3:o:linux:linux_kernel:5.18.8
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cpe:2.3:o:linux:linux_kernel:5.18.9
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cpe:2.3:o:linux:linux_kernel:5.19
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cpe:2.3:o:linux:linux_kernel:5.19.1
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cpe:2.3:o:linux:linux_kernel:5.19.10
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cpe:2.3:o:linux:linux_kernel:5.19.11
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cpe:2.3:o:linux:linux_kernel:5.19.12
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cpe:2.3:o:linux:linux_kernel:5.19.13
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cpe:2.3:o:linux:linux_kernel:5.19.14
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cpe:2.3:o:linux:linux_kernel:5.19.15
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cpe:2.3:o:linux:linux_kernel:5.19.16
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cpe:2.3:o:linux:linux_kernel:5.19.2
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cpe:2.3:o:linux:linux_kernel:5.19.3
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cpe:2.3:o:linux:linux_kernel:5.19.4
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cpe:2.3:o:linux:linux_kernel:5.19.5
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cpe:2.3:o:linux:linux_kernel:5.19.6
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cpe:2.3:o:linux:linux_kernel:5.19.7
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cpe:2.3:o:linux:linux_kernel:5.19.8
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cpe:2.3:o:linux:linux_kernel:5.19.9
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cpe:2.3:o:linux:linux_kernel:6.0
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cpe:2.3:o:linux:linux_kernel:6.0.1
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cpe:2.3:o:linux:linux_kernel:6.0.2