CVE-2025-68744 (GCVE-0-2025-68744)
Vulnerability from cvelistv5 – Published: 2025-12-24 12:09 – Updated: 2026-05-11 21:52
VLAI
EPSS
VEX
Title
bpf: Free special fields when update [lru_,]percpu_hash maps
Summary
In the Linux kernel, the following vulnerability has been resolved:
bpf: Free special fields when update [lru_,]percpu_hash maps
As [lru_,]percpu_hash maps support BPF_KPTR_{REF,PERCPU}, missing
calls to 'bpf_obj_free_fields()' in 'pcpu_copy_value()' could cause the
memory referenced by BPF_KPTR_{REF,PERCPU} fields to be held until the
map gets freed.
Fix this by calling 'bpf_obj_free_fields()' after
'copy_map_value[,_long]()' in 'pcpu_copy_value()'.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
65334e64a493c6a0976de7ad56bf8b7a9ff04b4a , < 994d6303ed0b84cbc795bb5becf7ed6de40d3f3c
(git)
Affected: 65334e64a493c6a0976de7ad56bf8b7a9ff04b4a , < 3bf1378747e251571e0de15e7e0a6bf2919044e7 (git) Affected: 65334e64a493c6a0976de7ad56bf8b7a9ff04b4a , < 96a5cb7072cabbac5c66ac9318242c3bdceebb68 (git) Affected: 65334e64a493c6a0976de7ad56bf8b7a9ff04b4a , < 4a03d69cece145e4fb527464be29c3806aa3221e (git) Affected: 65334e64a493c6a0976de7ad56bf8b7a9ff04b4a , < 6af6e49a76c9af7d42eb923703e7648cb2bf401a (git) |
guessed | |
| Linux | Linux |
Affected:
6.4
Unaffected: 0 , < 6.4 (semver) Unaffected: 6.6.120 , ≤ 6.6.* (semver) Unaffected: 6.12.63 , ≤ 6.12.* (semver) Unaffected: 6.17.13 , ≤ 6.17.* (semver) Unaffected: 6.18.2 , ≤ 6.18.* (semver) Unaffected: 6.19 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
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"product": "Linux",
"programFiles": [
"kernel/bpf/hashtab.c"
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},
{
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"status": "affected",
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{
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"status": "unaffected",
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{
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"version": "6.18.2",
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},
{
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"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
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},
{
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"versionStartIncluding": "6.4",
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}
],
"negate": false,
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}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Free special fields when update [lru_,]percpu_hash maps\n\nAs [lru_,]percpu_hash maps support BPF_KPTR_{REF,PERCPU}, missing\ncalls to \u0027bpf_obj_free_fields()\u0027 in \u0027pcpu_copy_value()\u0027 could cause the\nmemory referenced by BPF_KPTR_{REF,PERCPU} fields to be held until the\nmap gets freed.\n\nFix this by calling \u0027bpf_obj_free_fields()\u0027 after\n\u0027copy_map_value[,_long]()\u0027 in \u0027pcpu_copy_value()\u0027."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T21:52:30.476Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/994d6303ed0b84cbc795bb5becf7ed6de40d3f3c"
},
{
"url": "https://git.kernel.org/stable/c/3bf1378747e251571e0de15e7e0a6bf2919044e7"
},
{
"url": "https://git.kernel.org/stable/c/96a5cb7072cabbac5c66ac9318242c3bdceebb68"
},
{
"url": "https://git.kernel.org/stable/c/4a03d69cece145e4fb527464be29c3806aa3221e"
},
{
"url": "https://git.kernel.org/stable/c/6af6e49a76c9af7d42eb923703e7648cb2bf401a"
}
],
"title": "bpf: Free special fields when update [lru_,]percpu_hash maps",
"x_generator": {
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}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-68744",
"datePublished": "2025-12-24T12:09:40.839Z",
"dateReserved": "2025-12-24T10:30:51.031Z",
"dateUpdated": "2026-05-11T21:52:30.476Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-68744",
"date": "2026-09-15",
"epss": "0.00183",
"percentile": "0.08092"
},
"microsoft_vex": {
"current_release_date": "2026-02-18T02:26:56.000Z",
"cve": "CVE-2025-68744",
"id": "msrc_CVE-2025-68744",
"initial_release_date": "2025-12-02T00:00:00.000Z",
"product_status:fixed": "1",
"product_status:known_affected": "3",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "bpf: Free special fields when update [lru_,]percpu_hash maps",
"url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-68744.json",
"version": "5"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2025-68744\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-24T13:16:29.343\",\"lastModified\":\"2026-06-17T09:59:30.947\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf: Free special fields when update [lru_,]percpu_hash maps\\n\\nAs [lru_,]percpu_hash maps support BPF_KPTR_{REF,PERCPU}, missing\\ncalls to \u0027bpf_obj_free_fields()\u0027 in \u0027pcpu_copy_value()\u0027 could cause the\\nmemory referenced by BPF_KPTR_{REF,PERCPU} fields to be held until the\\nmap gets freed.\\n\\nFix this by calling \u0027bpf_obj_free_fields()\u0027 after\\n\u0027copy_map_value[,_long]()\u0027 in \u0027pcpu_copy_value()\u0027.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"kernel/bpf/hashtab.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"65334e64a493c6a0976de7ad56bf8b7a9ff04b4a\",\"lessThan\":\"994d6303ed0b84cbc795bb5becf7ed6de40d3f3c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"65334e64a493c6a0976de7ad56bf8b7a9ff04b4a\",\"lessThan\":\"3bf1378747e251571e0de15e7e0a6bf2919044e7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"65334e64a493c6a0976de7ad56bf8b7a9ff04b4a\",\"lessThan\":\"96a5cb7072cabbac5c66ac9318242c3bdceebb68\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"65334e64a493c6a0976de7ad56bf8b7a9ff04b4a\",\"lessThan\":\"4a03d69cece145e4fb527464be29c3806aa3221e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"65334e64a493c6a0976de7ad56bf8b7a9ff04b4a\",\"lessThan\":\"6af6e49a76c9af7d42eb923703e7648cb2bf401a\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"kernel/bpf/hashtab.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.4\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.4\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.120\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.63\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.17.13\",\"lessThanOrEqual\":\"6.17.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.2\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3bf1378747e251571e0de15e7e0a6bf2919044e7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4a03d69cece145e4fb527464be29c3806aa3221e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6af6e49a76c9af7d42eb923703e7648cb2bf401a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/96a5cb7072cabbac5c66ac9318242c3bdceebb68\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/994d6303ed0b84cbc795bb5becf7ed6de40d3f3c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-06-30T10:13:48+00:00",
"cve": "CVE-2025-68744",
"id": "CVE-2025-68744",
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"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: bpf: Free special fields when update [lru_,]percpu_hash maps",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68744.json",
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"suse_vex": {
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"current_release_date": "2026-09-11T01:49:26Z",
"cve": "CVE-2025-68744",
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"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2025-68744",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-68744.json",
"version": "36"
}
}
}
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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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