CVE-2026-43089 (GCVE-0-2026-43089)
Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-05-06 07:40
VLAI?
Title
xfrm_user: fix info leak in build_mapping()
Summary
In the Linux kernel, the following vulnerability has been resolved:
xfrm_user: fix info leak in build_mapping()
struct xfrm_usersa_id has a one-byte padding hole after the proto
field, which ends up never getting set to zero before copying out to
userspace. Fix that up by zeroing out the whole structure before
setting individual variables.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Affected:
3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4 , < d3125c541a96fb3c0fc7210112684baf22b6c24d
(git)
Affected: 3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4 , < 5a1a4b049ddde41466ccac0daeec326254b133f2 (git) Affected: 3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4 , < f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c (git) Affected: 3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4 , < 700c9622b23c33b5933e6dcea816492c064e4e10 (git) Affected: 3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4 , < 1beb76b2053b68c491b78370794b8ff63c8f8c02 (git) |
||
{
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{
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"product": "Linux",
"programFiles": [
"net/xfrm/xfrm_user.c"
],
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"vendor": "Linux",
"versions": [
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},
{
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.29"
},
{
"lessThan": "2.6.29",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.136",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.83",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.24",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"version": "6.19.14",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
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"versionStartIncluding": "2.6.29",
"vulnerable": true
},
{
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},
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},
{
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"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm_user: fix info leak in build_mapping()\n\nstruct xfrm_usersa_id has a one-byte padding hole after the proto\nfield, which ends up never getting set to zero before copying out to\nuserspace. Fix that up by zeroing out the whole structure before\nsetting individual variables."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-06T07:40:22.630Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/d3125c541a96fb3c0fc7210112684baf22b6c24d"
},
{
"url": "https://git.kernel.org/stable/c/5a1a4b049ddde41466ccac0daeec326254b133f2"
},
{
"url": "https://git.kernel.org/stable/c/f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c"
},
{
"url": "https://git.kernel.org/stable/c/700c9622b23c33b5933e6dcea816492c064e4e10"
},
{
"url": "https://git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02"
}
],
"title": "xfrm_user: fix info leak in build_mapping()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-43089",
"datePublished": "2026-05-06T07:40:22.630Z",
"dateReserved": "2026-05-01T14:12:55.984Z",
"dateUpdated": "2026-05-06T07:40:22.630Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-43089",
"date": "2026-05-07",
"epss": "0.00018",
"percentile": "0.04875"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-43089\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-06T10:16:22.200\",\"lastModified\":\"2026-05-06T13:08:07.970\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nxfrm_user: fix info leak in build_mapping()\\n\\nstruct xfrm_usersa_id has a one-byte padding hole after the proto\\nfield, which ends up never getting set to zero before copying out to\\nuserspace. Fix that up by zeroing out the whole structure before\\nsetting individual variables.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5a1a4b049ddde41466ccac0daeec326254b133f2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/700c9622b23c33b5933e6dcea816492c064e4e10\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d3125c541a96fb3c0fc7210112684baf22b6c24d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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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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