CVE-2021-47255
published 2024-05-21CVE-2021-47255: 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…
PriorityP430high7.1CVSS 3.1
AVLACLPRLUINSUCHINAH
EPSS
0.24%
15.7th percentile
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.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.10.46-1 (bookworm) | linux 5.10.46-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 01402cf81051f796dac7c60ca11d6147153ca46a < bf99ea52970caeb4583bdba1192c1f9b53b12c84 | bf99ea52970caeb4583bdba1192c1f9b53b12c84 |
| linux | linux | >= 01402cf81051f796dac7c60ca11d6147153ca46a < 018685461a5b9a9a70e664ac77aef0d7415a3fd5 | 018685461a5b9a9a70e664ac77aef0d7415a3fd5 |
| linux | linux | >= 01402cf81051f796dac7c60ca11d6147153ca46a < a2aff09807fbe4018c269d3773a629949058b210 | a2aff09807fbe4018c269d3773a629949058b210 |
| linux | linux | >= 01402cf81051f796dac7c60ca11d6147153ca46a < 218bf772bddd221489c38dde6ef8e917131161f6 | 218bf772bddd221489c38dde6ef8e917131161f6 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 5.11 < 5.12.13 | 5.12.13 |
| linux | linux_kernel | >= 5.3 < 5.4.128 | 5.4.128 |
| linux | linux_kernel | >= 5.5 < 5.10.46 | 5.10.46 |
CVSS provenance
nvdv3.17.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
osv7.1HIGH
vendor_debian7.1HIGH
vendor_redhat7.1HIGH
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OSV
CVE-2021-47255: In the Linux kernel, the following vulnerability has been resolved: kvm: LAPIC: Restore guard to prevent illegal APIC register access Per the SDM, "an
osv·2024-05-21·CVSS 7.1
CVE-2021-47255 [HIGH] CVE-2021-47255: In the Linux kernel, the following vulnerability has been resolved: kvm: LAPIC: Restore guard to prevent illegal APIC register access Per the SDM, "an
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.
GHSA
GHSA-wgwm-v825-xmjx: In the Linux kernel, the following vulnerability has been resolved:
kvm: LAPIC: Restore guard to prevent illegal APIC register access
Per the SDM, "
ghsa_unreviewed·2024-05-21
CVE-2021-47255 [HIGH] GHSA-wgwm-v825-xmjx: In the Linux kernel, the following vulnerability has been resolved:
kvm: LAPIC: Restore guard to prevent illegal APIC register access
Per the SDM, "
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.
Red Hat
kernel: kvm: LAPIC: Restore guard to prevent illegal APIC register access
vendor_redhat·2024-05-21·CVSS 7.1
CVE-2021-47255 [HIGH] CWE-402 kernel: kvm: LAPIC: Restore guard to prevent illegal APIC register access
kernel: kvm: LAPIC: Restore guard to prevent illegal APIC register access
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.
Package: kernel (Red Hat Enterprise Linux 6) - Out of support scope
Package: kernel (Red Hat Enterprise Linux 7) - Out of support scope
Package: kernel-rt (Red Hat Enterprise Linux 7) - Out of
Debian
CVE-2021-47255: linux - In the Linux kernel, the following vulnerability has been resolved: kvm: LAPIC:...
vendor_debian·2021·CVSS 7.1
CVE-2021-47255 [HIGH] CVE-2021-47255: linux - In the Linux kernel, the following vulnerability has been resolved: kvm: LAPIC:...
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.
Scope: local
bookworm: resolved (fixed in 5.10.46-1)
bullseye: resolved (fixed in 5.10.46-1)
forky: resolved (fixed in 5.10.46-1)
sid: resolved (fixed in 5.10.46-1)
trixie: resolved (fixed in 5.10.46-1)
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/018685461a5b9a9a70e664ac77aef0d7415a3fd5https://git.kernel.org/stable/c/218bf772bddd221489c38dde6ef8e917131161f6https://git.kernel.org/stable/c/a2aff09807fbe4018c269d3773a629949058b210https://git.kernel.org/stable/c/bf99ea52970caeb4583bdba1192c1f9b53b12c84https://git.kernel.org/stable/c/018685461a5b9a9a70e664ac77aef0d7415a3fd5https://git.kernel.org/stable/c/218bf772bddd221489c38dde6ef8e917131161f6https://git.kernel.org/stable/c/a2aff09807fbe4018c269d3773a629949058b210https://git.kernel.org/stable/c/bf99ea52970caeb4583bdba1192c1f9b53b12c84
2024-05-21
Published