CVE-2022-49895
published 2025-05-01CVE-2022-49895: In the Linux kernel, the following vulnerability has been resolved: cxl/region: Fix decoder allocation crash When an intermediate port's decoders have been…
PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.16%
5.6th percentile
In the Linux kernel, the following vulnerability has been resolved:
cxl/region: Fix decoder allocation crash
When an intermediate port's decoders have been exhausted by existing
regions, and creating a new region with the port in question in it's
hierarchical path is attempted, cxl_port_attach_region() fails to find a
port decoder (as would be expected), and drops into the failure / cleanup
path.
However, during cleanup of the region reference, a sanity check attempts
to dereference the decoder, which in the above case didn't exist. This
causes a NULL pointer dereference BUG.
To fix this, refactor the decoder allocation and de-allocation into
helper routines, and in this 'free' routine, check that the decoder,
@cxld, is valid before attempting any operations on it.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.0.8-1 (bookworm) | linux 6.0.8-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 384e624bb211b406db40edc900bb51af8bb267d0 < c6813b5610ac53af73edd87a660d23a0511faa47 | c6813b5610ac53af73edd87a660d23a0511faa47 |
| linux | linux | >= 384e624bb211b406db40edc900bb51af8bb267d0 < 71ee71d7adcba648077997a29a91158d20c40b09 | 71ee71d7adcba648077997a29a91158d20c40b09 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.0.8-1 | 6.0.8-1 |
| linux | linux_kernel | >= 0 < 6.0.8-1 | 6.0.8-1 |
| linux | linux_kernel | >= 0 < 6.0.8-1 | 6.0.8-1 |
| linux | linux_kernel | >= 6.0 < 6.0.8 | 6.0.8 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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OSV
CVE-2022-49895: In the Linux kernel, the following vulnerability has been resolved: cxl/region: Fix decoder allocation crash When an intermediate port's decoders have
osv·2025-05-01·CVSS 5.5
CVE-2022-49895 [MEDIUM] CVE-2022-49895: In the Linux kernel, the following vulnerability has been resolved: cxl/region: Fix decoder allocation crash When an intermediate port's decoders have
In the Linux kernel, the following vulnerability has been resolved: cxl/region: Fix decoder allocation crash When an intermediate port's decoders have been exhausted by existing regions, and creating a new region with the port in question in it's hierarchical path is attempted, cxl_port_attach_region() fails to find a port decoder (as would be expected), and drops into the failure / cleanup path. However, during cleanup of the region reference, a sanity check attempts to dereference the decoder, which in the above case didn't exist. This causes a NULL pointer dereference BUG. To fix this, refactor the decoder allocation and de-allocation into helper routines, and in this 'free' routine, check that the decoder, @cxld, is valid before attempting any operations on it.
GHSA
GHSA-vm29-jh4p-x8cp: In the Linux kernel, the following vulnerability has been resolved:
cxl/region: Fix decoder allocation crash
When an intermediate port's decoders ha
ghsa_unreviewed·2025-05-01
CVE-2022-49895 [MEDIUM] CWE-476 GHSA-vm29-jh4p-x8cp: In the Linux kernel, the following vulnerability has been resolved:
cxl/region: Fix decoder allocation crash
When an intermediate port's decoders ha
In the Linux kernel, the following vulnerability has been resolved:
cxl/region: Fix decoder allocation crash
When an intermediate port's decoders have been exhausted by existing
regions, and creating a new region with the port in question in it's
hierarchical path is attempted, cxl_port_attach_region() fails to find a
port decoder (as would be expected), and drops into the failure / cleanup
path.
However, during cleanup of the region reference, a sanity check attempts
to dereference the decoder, which in the above case didn't exist. This
causes a NULL pointer dereference BUG.
To fix this, refactor the decoder allocation and de-allocation into
helper routines, and in this 'free' routine, check that the decoder,
@cxld, is valid before attempting any operations on it.
Red Hat
kernel: cxl/region: Fix decoder allocation crash
vendor_redhat·2025-05-01·CVSS 5.5
CVE-2022-49895 [MEDIUM] CWE-476 kernel: cxl/region: Fix decoder allocation crash
kernel: cxl/region: Fix decoder allocation crash
In the Linux kernel, the following vulnerability has been resolved:
cxl/region: Fix decoder allocation crash
When an intermediate port's decoders have been exhausted by existing
regions, and creating a new region with the port in question in it's
hierarchical path is attempted, cxl_port_attach_region() fails to find a
port decoder (as would be expected), and drops into the failure / cleanup
path.
However, during cleanup of the region reference, a sanity check attempts
to dereference the decoder, which in the above case didn't exist. This
causes a NULL pointer dereference BUG.
To fix this, refactor the decoder allocation and de-allocation into
helper routines, and in this 'free' routine, check that the decoder,
@cxld, is valid before attempt
Debian
CVE-2022-49895: linux - In the Linux kernel, the following vulnerability has been resolved: cxl/region:...
vendor_debian·2022·CVSS 5.5
CVE-2022-49895 [MEDIUM] CVE-2022-49895: linux - In the Linux kernel, the following vulnerability has been resolved: cxl/region:...
In the Linux kernel, the following vulnerability has been resolved: cxl/region: Fix decoder allocation crash When an intermediate port's decoders have been exhausted by existing regions, and creating a new region with the port in question in it's hierarchical path is attempted, cxl_port_attach_region() fails to find a port decoder (as would be expected), and drops into the failure / cleanup path. However, during cleanup of the region reference, a sanity check attempts to dereference the decoder, which in the above case didn't exist. This causes a NULL pointer dereference BUG. To fix this, refactor the decoder allocation and de-allocation into helper routines, and in this 'free' routine, check that the decoder, @cxld, is valid before attempting any operations on it.
Scope: local
bookworm: r
No detection rules found.
No public exploits indexed.
2025-05-01
Published