CVE-2023-53254
published 2025-09-15CVE-2023-53254: In the Linux kernel, the following vulnerability has been resolved: cacheinfo: Fix shared_cpu_map to handle shared caches at different levels The cacheinfo…
PriorityP429high7.1CVSS 3.1
AVLACLPRLUINSUCHINAH
EPSS
0.14%
3.7th percentile
In the Linux kernel, the following vulnerability has been resolved:
cacheinfo: Fix shared_cpu_map to handle shared caches at different levels
The cacheinfo sets up the shared_cpu_map by checking whether the caches
with the same index are shared between CPUs. However, this will trigger
slab-out-of-bounds access if the CPUs do not have the same cache hierarchy.
Another problem is the mismatched shared_cpu_map when the shared cache does
not have the same index between CPUs.
CPU0 I D L3
index 0 1 2 x
^ ^ ^ ^
index 0 1 2 3
CPU1 I D L2 L3
This patch checks each cache is shared with all caches on other CPUs.
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.20-1 (bookworm) | linux 6.1.20-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 246246cbde5e840012f853e27630ebb59f409486 < 2f588d0345d69a35e451077afed428fd057a5e34 | 2f588d0345d69a35e451077afed428fd057a5e34 |
| linux | linux | >= 246246cbde5e840012f853e27630ebb59f409486 < dea49f2993f57d8a2df2cacb0bf649ef49b28879 | dea49f2993f57d8a2df2cacb0bf649ef49b28879 |
| linux | linux | >= 246246cbde5e840012f853e27630ebb59f409486 < 198102c9103fc78d8478495971947af77edb05c1 | 198102c9103fc78d8478495971947af77edb05c1 |
| linux | linux_kernel | < 6.1.18 | 6.1.18 |
| linux | linux_kernel | >= 0 < 6.1.20-1 | 6.1.20-1 |
| linux | linux_kernel | >= 0 < 6.1.20-1 | 6.1.20-1 |
| linux | linux_kernel | >= 0 < 6.1.20-1 | 6.1.20-1 |
| linux | linux_kernel | >= 6.2 < 6.2.5 | 6.2.5 |
| msrc | cbl2_kernel_5.15.186.1-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_kernel_5.15.200.1-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_kernel_5.15.202.1-1_on_cbl_mariner_2.0 | — | — |
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_msrc7.1HIGH
vendor_redhat7.1HIGH
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GHSA
GHSA-7h3h-qq7m-57c9: In the Linux kernel, the following vulnerability has been resolved:
cacheinfo: Fix shared_cpu_map to handle shared caches at different levels
The ca
ghsa_unreviewed·2025-09-15
CVE-2023-53254 [HIGH] CWE-125 GHSA-7h3h-qq7m-57c9: In the Linux kernel, the following vulnerability has been resolved:
cacheinfo: Fix shared_cpu_map to handle shared caches at different levels
The ca
In the Linux kernel, the following vulnerability has been resolved:
cacheinfo: Fix shared_cpu_map to handle shared caches at different levels
The cacheinfo sets up the shared_cpu_map by checking whether the caches
with the same index are shared between CPUs. However, this will trigger
slab-out-of-bounds access if the CPUs do not have the same cache hierarchy.
Another problem is the mismatched shared_cpu_map when the shared cache does
not have the same index between CPUs.
CPU0 I D L3
index 0 1 2 x
^ ^ ^ ^
index 0 1 2 3
CPU1 I D L2 L3
This patch checks each cache is shared with all caches on other CPUs.
OSV
CVE-2023-53254: In the Linux kernel, the following vulnerability has been resolved: cacheinfo: Fix shared_cpu_map to handle shared caches at different levels The cach
osv·2025-09-15·CVSS 7.1
CVE-2023-53254 [HIGH] CVE-2023-53254: In the Linux kernel, the following vulnerability has been resolved: cacheinfo: Fix shared_cpu_map to handle shared caches at different levels The cach
In the Linux kernel, the following vulnerability has been resolved: cacheinfo: Fix shared_cpu_map to handle shared caches at different levels The cacheinfo sets up the shared_cpu_map by checking whether the caches with the same index are shared between CPUs. However, this will trigger slab-out-of-bounds access if the CPUs do not have the same cache hierarchy. Another problem is the mismatched shared_cpu_map when the shared cache does not have the same index between CPUs. CPU0 I D L3 index 0 1 2 x ^ ^ ^ ^ index 0 1 2 3 CPU1 I D L2 L3 This patch checks each cache is shared with all caches on other CPUs.
Red Hat
kernel: cacheinfo: Fix shared_cpu_map to handle shared caches at different levels
vendor_redhat·2025-09-15·CVSS 7.1
CVE-2023-53254 [HIGH] CWE-125 kernel: cacheinfo: Fix shared_cpu_map to handle shared caches at different levels
kernel: cacheinfo: Fix shared_cpu_map to handle shared caches at different levels
In the Linux kernel, the following vulnerability has been resolved:
cacheinfo: Fix shared_cpu_map to handle shared caches at different levels
The cacheinfo sets up the shared_cpu_map by checking whether the caches
with the same index are shared between CPUs. However, this will trigger
slab-out-of-bounds access if the CPUs do not have the same cache hierarchy.
Another problem is the mismatched shared_cpu_map when the shared cache does
not have the same index between CPUs.
CPU0IDL3
index012x
^^^^
index0123
CPU1IDL2L3
This patch checks each cache is shared with all caches on other CPUs.
Package: kernel (Red Hat Enterprise Linux 10) - Not affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Pa
Microsoft
cacheinfo: Fix shared_cpu_map to handle shared caches at different levels
vendor_msrc·2025-09-09·CVSS 7.1
CVE-2023-53254 [HIGH] CWE-125 cacheinfo: Fix shared_cpu_map to handle shared caches at different levels
cacheinfo: Fix shared_cpu_map to handle shared caches at different levels
Mariner: Mariner
Linux: Linux
Customer Action Required: Yes
Debian
CVE-2023-53254: linux - In the Linux kernel, the following vulnerability has been resolved: cacheinfo: ...
vendor_debian·2023·CVSS 7.1
CVE-2023-53254 [HIGH] CVE-2023-53254: linux - In the Linux kernel, the following vulnerability has been resolved: cacheinfo: ...
In the Linux kernel, the following vulnerability has been resolved: cacheinfo: Fix shared_cpu_map to handle shared caches at different levels The cacheinfo sets up the shared_cpu_map by checking whether the caches with the same index are shared between CPUs. However, this will trigger slab-out-of-bounds access if the CPUs do not have the same cache hierarchy. Another problem is the mismatched shared_cpu_map when the shared cache does not have the same index between CPUs. CPU0 I D L3 index 0 1 2 x ^ ^ ^ ^ index 0 1 2 3 CPU1 I D L2 L3 This patch checks each cache is shared with all caches on other CPUs.
Scope: local
bookworm: resolved (fixed in 6.1.20-1)
bullseye: open
forky: resolved (fixed in 6.1.20-1)
sid: resolved (fixed in 6.1.20-1)
trixie: resolved (fixed in 6.1.20-1)
No detection rules found.
No public exploits indexed.
2025-09-15
Published