CVE-2024-42063 (GCVE-0-2024-42063)
Vulnerability from cvelistv5 – Published: 2024-07-29 15:52 – Updated: 2026-05-11 20:26
VLAI
EPSS
VEX
Title
bpf: Mark bpf prog stack with kmsan_unposion_memory in interpreter mode
Summary
In the Linux kernel, the following vulnerability has been resolved:
bpf: Mark bpf prog stack with kmsan_unposion_memory in interpreter mode
syzbot reported uninit memory usages during map_{lookup,delete}_elem.
==========
BUG: KMSAN: uninit-value in __dev_map_lookup_elem kernel/bpf/devmap.c:441 [inline]
BUG: KMSAN: uninit-value in dev_map_lookup_elem+0xf3/0x170 kernel/bpf/devmap.c:796
__dev_map_lookup_elem kernel/bpf/devmap.c:441 [inline]
dev_map_lookup_elem+0xf3/0x170 kernel/bpf/devmap.c:796
____bpf_map_lookup_elem kernel/bpf/helpers.c:42 [inline]
bpf_map_lookup_elem+0x5c/0x80 kernel/bpf/helpers.c:38
___bpf_prog_run+0x13fe/0xe0f0 kernel/bpf/core.c:1997
__bpf_prog_run256+0xb5/0xe0 kernel/bpf/core.c:2237
==========
The reproducer should be in the interpreter mode.
The C reproducer is trying to run the following bpf prog:
0: (18) r0 = 0x0
2: (18) r1 = map[id:49]
4: (b7) r8 = 16777216
5: (7b) *(u64 *)(r10 -8) = r8
6: (bf) r2 = r10
7: (07) r2 += -229
^^^^^^^^^^
8: (b7) r3 = 8
9: (b7) r4 = 0
10: (85) call dev_map_lookup_elem#1543472
11: (95) exit
It is due to the "void *key" (r2) passed to the helper. bpf allows uninit
stack memory access for bpf prog with the right privileges. This patch
uses kmsan_unpoison_memory() to mark the stack as initialized.
This should address different syzbot reports on the uninit "void *key"
argument during map_{lookup,delete}_elem.
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:20 UTC
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
bd4cf0ed331a275e9bf5a49e6d0fd55dffc551b8 , < b30f3197a6cd080052d5d4973f9a6b479fd9fff5
(git)
Affected: bd4cf0ed331a275e9bf5a49e6d0fd55dffc551b8 , < d812ae6e02bd6e6a9cd1fdb09519c2f33e875faf (git) Affected: bd4cf0ed331a275e9bf5a49e6d0fd55dffc551b8 , < 3189983c26108cf0990e5c46856dc9feb9470d12 (git) Affected: bd4cf0ed331a275e9bf5a49e6d0fd55dffc551b8 , < e8742081db7d01f980c6161ae1e8a1dbc1e30979 (git) |
guessed | |
| Linux | Linux |
Affected:
3.15
Unaffected: 0 , < 3.15 (semver) Unaffected: 6.1.97 , ≤ 6.1.* (semver) Unaffected: 6.6.37 , ≤ 6.6.* (semver) Unaffected: 6.9.8 , ≤ 6.9.* (semver) Unaffected: 6.10 , ≤ * (original_commit_for_fix) |
guessed |
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},
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/b30f3197a6cd080052d5d4973f9a6b479fd9fff5\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/d812ae6e02bd6e6a9cd1fdb09519c2f33e875faf\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/3189983c26108cf0990e5c46856dc9feb9470d12\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/e8742081db7d01f980c6161ae1e8a1dbc1e30979\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T22:01:03.937Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-42063\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T16:20:09.278781Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:14.736Z\"}}], \"cna\": {\"title\": \"bpf: Mark bpf prog stack with kmsan_unposion_memory in interpreter mode\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"bd4cf0ed331a275e9bf5a49e6d0fd55dffc551b8\", \"lessThan\": \"b30f3197a6cd080052d5d4973f9a6b479fd9fff5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bd4cf0ed331a275e9bf5a49e6d0fd55dffc551b8\", \"lessThan\": \"d812ae6e02bd6e6a9cd1fdb09519c2f33e875faf\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bd4cf0ed331a275e9bf5a49e6d0fd55dffc551b8\", \"lessThan\": \"3189983c26108cf0990e5c46856dc9feb9470d12\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bd4cf0ed331a275e9bf5a49e6d0fd55dffc551b8\", \"lessThan\": \"e8742081db7d01f980c6161ae1e8a1dbc1e30979\", \"versionType\": \"git\"}], \"programFiles\": [\"kernel/bpf/core.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.15\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.15\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.97\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.37\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9.8\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"kernel/bpf/core.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/b30f3197a6cd080052d5d4973f9a6b479fd9fff5\"}, {\"url\": \"https://git.kernel.org/stable/c/d812ae6e02bd6e6a9cd1fdb09519c2f33e875faf\"}, {\"url\": \"https://git.kernel.org/stable/c/3189983c26108cf0990e5c46856dc9feb9470d12\"}, {\"url\": \"https://git.kernel.org/stable/c/e8742081db7d01f980c6161ae1e8a1dbc1e30979\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf: Mark bpf prog stack with kmsan_unposion_memory in interpreter mode\\n\\nsyzbot reported uninit memory usages during map_{lookup,delete}_elem.\\n\\n==========\\nBUG: KMSAN: uninit-value in __dev_map_lookup_elem kernel/bpf/devmap.c:441 [inline]\\nBUG: KMSAN: uninit-value in dev_map_lookup_elem+0xf3/0x170 kernel/bpf/devmap.c:796\\n__dev_map_lookup_elem kernel/bpf/devmap.c:441 [inline]\\ndev_map_lookup_elem+0xf3/0x170 kernel/bpf/devmap.c:796\\n____bpf_map_lookup_elem kernel/bpf/helpers.c:42 [inline]\\nbpf_map_lookup_elem+0x5c/0x80 kernel/bpf/helpers.c:38\\n___bpf_prog_run+0x13fe/0xe0f0 kernel/bpf/core.c:1997\\n__bpf_prog_run256+0xb5/0xe0 kernel/bpf/core.c:2237\\n==========\\n\\nThe reproducer should be in the interpreter mode.\\n\\nThe C reproducer is trying to run the following bpf prog:\\n\\n 0: (18) r0 = 0x0\\n 2: (18) r1 = map[id:49]\\n 4: (b7) r8 = 16777216\\n 5: (7b) *(u64 *)(r10 -8) = r8\\n 6: (bf) r2 = r10\\n 7: (07) r2 += -229\\n ^^^^^^^^^^\\n\\n 8: (b7) r3 = 8\\n 9: (b7) r4 = 0\\n 10: (85) call dev_map_lookup_elem#1543472\\n 11: (95) exit\\n\\nIt is due to the \\\"void *key\\\" (r2) passed to the helper. bpf allows uninit\\nstack memory access for bpf prog with the right privileges. This patch\\nuses kmsan_unpoison_memory() to mark the stack as initialized.\\n\\nThis should address different syzbot reports on the uninit \\\"void *key\\\"\\nargument during map_{lookup,delete}_elem.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.97\", \"versionStartIncluding\": \"3.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.37\", \"versionStartIncluding\": \"3.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.8\", \"versionStartIncluding\": \"3.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10\", \"versionStartIncluding\": \"3.15\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-01-05T10:51:28.884Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2024-42063\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-05T10:51:28.884Z\", \"dateReserved\": \"2024-07-29T15:50:41.166Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-29T15:52:28.533Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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