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An issue was discovered in the Linux kernel 2.6.39 through 5.10.16 as used in Xen. Block net and SCSI backends consider certain errors a plain bug deliberately causing a kernel crash. For errors potentially being at least under the influence of guests (such as out of memory conditions) it isn't correct to assume a plain bug. Memory allocations potentially causing such crashes occur only when Linux is running in PV mode though. This affects drivers/block/xen-blkback/blkback.c and drivers/xen/xen-scsiback.c.

🗓️ 25 Feb 2021 08:00:00Reported by MicrosoftType 
mscve
 mscve
🔗 msrc.microsoft.com👁 1 Views

Xen block and SCSI backends misclassify errors as bugs, causing crashes in paravirtualization mode.

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25 Feb 2021 08:00Current
7.7High risk
Vulners AI Score7.7
CVSS 21.9
CVSS 3.15.5
EPSS0.00074
1