vulnerability
Debian: CVE-2021-47255: linux -- security update
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:S/C:C/I:N/A:P) | 05/21/2024 | 07/30/2024 | 02/20/2025 |
Severity
5
CVSS
(AV:L/AC:L/Au:S/C:C/I:N/A:P)
Published
05/21/2024
Added
07/30/2024
Modified
02/20/2025
Description
In the Linux kernel, the following vulnerability has been resolved:
kvm: LAPIC: Restore guard to prevent illegal APIC register access
Per the SDM, "any access that touches bytes 4 through 15 of an APIC
register may cause undefined behavior and must not be executed."
Worse, such an access in kvm_lapic_reg_read can result in a leak of
kernel stack contents. Prior to commit 01402cf81051 ("kvm: LAPIC:
write down valid APIC registers"), such an access was explicitly
disallowed. Restore the guard that was removed in that commit.
Solution
debian-upgrade-linux
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