KVM: s390: vsie: zero stale crypto bits
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.1%
exploitation probability
0.1%top 97% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
KVM: s390: vsie: zero stale crypto bits
When shadowing crypto access bits from a format0 apcb (crycb 0 or 1),
the bits 64..255 are unchanged from whatever is in the vsie page in the
crycb and thus in the apcb. This gives a nested guest potential access
to a device no longer available. Zero out the remaining bits.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/087c19cc60a8caa1a08e1e434c8be2caf6c27733https://git.kernel.org/stable/c/29b4f7bc2991313bd3e6f6fb8fdf1b173f086dd6https://git.kernel.org/stable/c/34d5b5b646c91cfb9338d7a12c955a70ffb8c66bhttps://git.kernel.org/stable/c/59d51550b5cb916bda037673a721a404b3b47a0dhttps://git.kernel.org/stable/c/7d23489f51109e3ebba5b5db8c5f0185af7b7fdfhttps://git.kernel.org/stable/c/935eeba276012916c76243e5cbb843efd8fdb75dhttps://git.kernel.org/stable/c/d110b3297f11ef227098b8a82ade2d5f123b7d2fhttps://git.kernel.org/stable/c/d4bcd2df6d0d2af916b4fe1a533958778ea7c45bhttps://git.kernel.org/stable/c/f6079dca67eccb5eabef9f72437948c66dc5131f