CVE-2023-52792
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2023-52792
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52792.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2023-52792
- Downstream
- Related
- Published
- 2024-05-21T15:31:07Z
- Modified
- 2025-10-15T04:32:44.341758Z
- Summary
- cxl/region: Do not try to cleanup after cxl_region_setup_targets() fails
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
cxl/region: Do not try to cleanup after cxlregionsetup_targets() fails
Commit 5e42bcbc3fef ("cxl/region: decrement ->nrtargets on error in cxlregionattach()") tried to avoid 'eiw' initialization errors when ->nrtargets exceeded 16, by just decrementing ->nrtargets when cxlregionsetuptargets() failed.
Commit 86987c766276 ("cxl/region: Cleanup target list on attach error") extended that cleanup to also clear cxled->pos and p->targets[pos]. The initialization error was incidentally fixed separately by: Commit 8d4285425714 ("cxl/region: Fix port setup uninitialized variable warnings") which was merged a few days after 5e42bcbc3fef.
But now the original cleanup when cxlregionsetup_targets() fails prevents endpoint and switch decoder resources from being reused:
1) the cleanup does not set the decoder's region to NULL, which results in future dpasizestore() calls returning -EBUSY 2) the decoder is not properly freed, which results in future commit errors associated with the upstream switch
Now that the initialization errors were fixed separately, the proper cleanup for this case is to just return immediately. Then the resources associated with this target get cleanup up as normal when the failed region is deleted.
The ->nr_targets decrement in the error case also helped prevent a p->targets[] array overflow, so add a new check to prevent against that overflow.
Tested by trying to create an invalid region for a 2 switch * 2 endpoint topology, and then following up with creating a valid region.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/0718588c7aaa7a1510b4de972370535b61dddd0d
- https://git.kernel.org/stable/c/07ffcd8ec79cf7383e1e45815f4842fd357991c2
- https://git.kernel.org/stable/c/9090c5537c93cd0811ab7bfbd925b57addfffb60
- https://git.kernel.org/stable/c/90db4c1d5ebaf574d3c3065c055977982c378a83
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5e42bcbc3fef6e759dfb4d3f4cfb394c382b4249Fixed90db4c1d5ebaf574d3c3065c055977982c378a83
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5e42bcbc3fef6e759dfb4d3f4cfb394c382b4249Fixed9090c5537c93cd0811ab7bfbd925b57addfffb60
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5e42bcbc3fef6e759dfb4d3f4cfb394c382b4249Fixed07ffcd8ec79cf7383e1e45815f4842fd357991c2
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5e42bcbc3fef6e759dfb4d3f4cfb394c382b4249Fixed0718588c7aaa7a1510b4de972370535b61dddd0d
Affected versions
v5.*
v5.19
v5.19-rc4
v5.19-rc5
v5.19-rc6
v5.19-rc7
v5.19-rc8
v6.*
v6.0
v6.0-rc1
v6.0-rc2
v6.0-rc3
v6.0-rc4
v6.0-rc5
v6.0-rc6
v6.0-rc7
v6.1
v6.1-rc1
v6.1-rc2
v6.1-rc3
v6.1-rc4
v6.1-rc5
v6.1-rc6
v6.1-rc7
v6.1-rc8
v6.1.1
v6.1.10
v6.1.11
v6.1.12
v6.1.13
v6.1.14
v6.1.15
v6.1.16
v6.1.17
v6.1.18
v6.1.19
v6.1.2
v6.1.20
v6.1.21
v6.1.22
v6.1.23
v6.1.24
v6.1.25
v6.1.26
v6.1.27
v6.1.28
v6.1.29
v6.1.3
v6.1.30
v6.1.31
v6.1.32
v6.1.33
v6.1.34
v6.1.35
v6.1.36
v6.1.37
v6.1.38
v6.1.39
v6.1.4
v6.1.40
v6.1.41
v6.1.42
v6.1.43
v6.1.44
v6.1.45
v6.1.46
v6.1.47
v6.1.48
v6.1.49
v6.1.5
v6.1.50
v6.1.51
v6.1.52
v6.1.53
v6.1.54
v6.1.55
v6.1.56
v6.1.57
v6.1.58
v6.1.59
v6.1.6
v6.1.60
v6.1.61
v6.1.62
v6.1.63
v6.1.7
v6.1.8
v6.1.9
v6.2
v6.2-rc1
v6.2-rc2
v6.2-rc3
v6.2-rc4
v6.2-rc5
v6.2-rc6
v6.2-rc7
v6.2-rc8
v6.3
v6.3-rc1
v6.3-rc2
v6.3-rc3
v6.3-rc4
v6.3-rc5
v6.3-rc6
v6.3-rc7
v6.4
v6.4-rc1
v6.4-rc2
v6.4-rc3
v6.4-rc4
v6.4-rc5
v6.4-rc6
v6.4-rc7
v6.5
v6.5-rc1
v6.5-rc2
v6.5-rc3
v6.5-rc4
v6.5-rc5
v6.5-rc6
v6.5-rc7
v6.5.1
v6.5.10
v6.5.11
v6.5.12
v6.5.2
v6.5.3
v6.5.4
v6.5.5
v6.5.6
v6.5.7
v6.5.8
v6.5.9
v6.6
v6.6-rc1
v6.6-rc2
v6.6-rc3
v6.6-rc4
v6.6-rc5
v6.6-rc6
v6.6-rc7
v6.6.1
v6.6.2
Database specific
{
"vanir_signatures": [
{
"signature_version": "v1",
"signature_type": "Function",
"target": {
"file": "drivers/cxl/core/region.c",
"function": "cxl_region_attach"
},
"deprecated": false,
"digest": {
"length": 3288.0,
"function_hash": "165943320437948083185159443346395062167"
},
"id": "CVE-2023-52792-3e29bf02",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@0718588c7aaa7a1510b4de972370535b61dddd0d"
},
{
"signature_version": "v1",
"signature_type": "Line",
"target": {
"file": "drivers/cxl/core/region.c"
},
"deprecated": false,
"digest": {
"line_hashes": [
"338309743601467819447331107588873893627",
"40546179707126617824916762594589762986",
"130666761302850310095312169879975621054",
"326830226360759602680247759389406749535",
"15260416978765492115826220674040512364",
"67467872864217268909510301826562201517",
"56259169596207305598519677539625855823",
"274253393444860677320477760875229083344",
"160893765814473856098096938951911256611",
"319625470494188205320997271885880821922",
"179270010210019517714850340305127192926",
"258308811132821393598644258215110093263",
"70316364620554180341382858457560815842",
"97827112115470193505772466961526016943",
"332461905581247430844587425254812224953"
],
"threshold": 0.9
},
"id": "CVE-2023-52792-4273b92f",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@0718588c7aaa7a1510b4de972370535b61dddd0d"
},
{
"signature_version": "v1",
"signature_type": "Line",
"target": {
"file": "drivers/cxl/core/region.c"
},
"deprecated": false,
"digest": {
"line_hashes": [
"338309743601467819447331107588873893627",
"40546179707126617824916762594589762986",
"130666761302850310095312169879975621054",
"326830226360759602680247759389406749535",
"15260416978765492115826220674040512364",
"67467872864217268909510301826562201517",
"56259169596207305598519677539625855823",
"34406397699475931796832537254167863481",
"48465337491081037817775719399222875796",
"319625470494188205320997271885880821922",
"179270010210019517714850340305127192926",
"258308811132821393598644258215110093263",
"70316364620554180341382858457560815842",
"97827112115470193505772466961526016943",
"332461905581247430844587425254812224953"
],
"threshold": 0.9
},
"id": "CVE-2023-52792-65607b2a",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@07ffcd8ec79cf7383e1e45815f4842fd357991c2"
},
{
"signature_version": "v1",
"signature_type": "Function",
"target": {
"file": "drivers/cxl/core/region.c",
"function": "cxl_region_attach"
},
"deprecated": false,
"digest": {
"length": 3599.0,
"function_hash": "170994532342835505781417115622720399595"
},
"id": "CVE-2023-52792-6b5d3242",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@9090c5537c93cd0811ab7bfbd925b57addfffb60"
},
{
"signature_version": "v1",
"signature_type": "Function",
"target": {
"file": "drivers/cxl/core/region.c",
"function": "cxl_region_attach"
},
"deprecated": false,
"digest": {
"length": 2701.0,
"function_hash": "68631649230761355827289449321288029061"
},
"id": "CVE-2023-52792-76b7a433",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@90db4c1d5ebaf574d3c3065c055977982c378a83"
},
{
"signature_version": "v1",
"signature_type": "Function",
"target": {
"file": "drivers/cxl/core/region.c",
"function": "cxl_region_attach"
},
"deprecated": false,
"digest": {
"length": 3599.0,
"function_hash": "170994532342835505781417115622720399595"
},
"id": "CVE-2023-52792-79b6cd26",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@07ffcd8ec79cf7383e1e45815f4842fd357991c2"
},
{
"signature_version": "v1",
"signature_type": "Line",
"target": {
"file": "drivers/cxl/core/region.c"
},
"deprecated": false,
"digest": {
"line_hashes": [
"338309743601467819447331107588873893627",
"40546179707126617824916762594589762986",
"130666761302850310095312169879975621054",
"326830226360759602680247759389406749535",
"15260416978765492115826220674040512364",
"67467872864217268909510301826562201517",
"56259169596207305598519677539625855823",
"34406397699475931796832537254167863481",
"48465337491081037817775719399222875796",
"319625470494188205320997271885880821922",
"179270010210019517714850340305127192926",
"258308811132821393598644258215110093263",
"70316364620554180341382858457560815842",
"97827112115470193505772466961526016943",
"332461905581247430844587425254812224953"
],
"threshold": 0.9
},
"id": "CVE-2023-52792-ce19f820",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@9090c5537c93cd0811ab7bfbd925b57addfffb60"
},
{
"signature_version": "v1",
"signature_type": "Line",
"target": {
"file": "drivers/cxl/core/region.c"
},
"deprecated": false,
"digest": {
"line_hashes": [
"338309743601467819447331107588873893627",
"40546179707126617824916762594589762986",
"130666761302850310095312169879975621054",
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"15260416978765492115826220674040512364",
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"319625470494188205320997271885880821922",
"179270010210019517714850340305127192926",
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"97827112115470193505772466961526016943",
"332461905581247430844587425254812224953"
],
"threshold": 0.9
},
"id": "CVE-2023-52792-e0ddc60d",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@90db4c1d5ebaf574d3c3065c055977982c378a83"
}
]
}