In the Linux kernel, the following vulnerability has been resolved: scsi:
ibmvfc: Remove BUG_ON in the case of an empty event pool In practice the
driver should never send more commands than are allocated to a queue’s
event pool. In the unlikely event that this happens, the code asserts a
BUG_ON, and in the case that the kernel is not configured to crash on panic
returns a junk event pointer from the empty event list causing things to
spiral from there. This BUG_ON is a historical artifact of the ibmvfc
driver first being upstreamed, and it is well known now that the use of
BUG_ON is bad practice except in the most unrecoverable scenario. There is
nothing about this scenario that prevents the driver from recovering and
carrying on. Remove the BUG_ON in question from ibmvfc_get_event() and
return a NULL pointer in the case of an empty event pool. Update all call
sites to ibmvfc_get_event() to check for a NULL pointer and perfrom the
appropriate failure or recovery action.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 20.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-aws-5.15 | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux-aws-6.5 | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-azure | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux-azure | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-azure-5.15 | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux-azure-6.5 | < any | UNKNOWN |
git.kernel.org/linus/b39f2d10b86d0af353ea339e5815820026bca48f (6.7-rc1)
git.kernel.org/stable/c/88984ec4792766df5a9de7a2ff2b5f281f94c7d4
git.kernel.org/stable/c/8bbe784c2ff28d56ca0c548aaf3e584edc77052d
git.kernel.org/stable/c/b39f2d10b86d0af353ea339e5815820026bca48f
git.kernel.org/stable/c/d2af4ef80601224b90630c1ddc7cd2c7c8ab4dd8
git.kernel.org/stable/c/e1d1f79b1929dce470a5dc9281c574cd58e8c6c0
launchpad.net/bugs/cve/CVE-2023-52811
nvd.nist.gov/vuln/detail/CVE-2023-52811
security-tracker.debian.org/tracker/CVE-2023-52811
www.cve.org/CVERecord?id=CVE-2023-52811