FKIE_CVE-2026-72450
Vulnerability from fkie_nvd - Published: 2026-08-15 06:22 - Updated: 2026-08-17 06:19
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
xfrm: validate selector family and prefixlen during match
syzbot reported a shift-out-of-bounds in xfrm_selector_match()
due to AF_UNSPEC selector with large prefixlen (e.g. 128) matched
against IPv4 flow (when XFRM_STATE_AF_UNSPEC is set).
Fix this by:
- Rejecting mismatched families in xfrm_selector_match.
- Returning false in addr4_match if prefixlen > 32.
- Returning false in addr_match if prefixlen > 128 (prevents overflow).
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"include/net/xfrm.h",
"net/xfrm/xfrm_policy.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "87a5bbccc7ff4edb3f42fea387124237d2ba91ee",
"status": "affected",
"version": "8df5cd51fd70c33aa1776e5cbcd82b0a86649d73",
"versionType": "git"
},
{
"lessThan": "bd7f202cf77556cff59f68dc30e4cdf40cb6e33b",
"status": "affected",
"version": "2d08a6c31c65f23db71a5385ee9cf9d8f9a67a71",
"versionType": "git"
},
{
"lessThan": "a3968ad4195d72c8fddcc6c0ef39da95ac98711a",
"status": "affected",
"version": "bce1afaa212ec380bf971614f70909a27882b862",
"versionType": "git"
},
{
"lessThan": "efa9e3b9f3dea2e1ea4c7edf4edc863faef85986",
"status": "affected",
"version": "7d9868180bd1e4cf37e7c5067362658971162366",
"versionType": "git"
},
{
"lessThan": "78783fefdc8f36879b1a17efa0d3195ea5f2dc5f",
"status": "affected",
"version": "3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563",
"versionType": "git"
},
{
"lessThan": "6d99379c58f7f1c6ab2cc7aba01a4f52d71adcfe",
"status": "affected",
"version": "3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563",
"versionType": "git"
},
{
"lessThan": "5a03a2ee17e8259dde631ed84fd8322db06cb2ae",
"status": "affected",
"version": "3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563",
"versionType": "git"
},
{
"lessThan": "40f0b1047918539f0b0f795ac65e35336b4c2c78",
"status": "affected",
"version": "3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563",
"versionType": "git"
},
{
"status": "affected",
"version": "f31398570acf0f0804c644006f7bfa9067106b0a",
"versionType": "git"
},
{
"status": "affected",
"version": "401ad99a5ae7180dd9449eac104cb755f442e7f3",
"versionType": "git"
},
{
"status": "affected",
"version": "e68dd80ba498265d2266b12dc3459164f4ff0c4a",
"versionType": "git"
},
{
"lessThan": "5.10.261",
"status": "affected",
"version": "5.10.229",
"versionType": "semver"
},
{
"lessThan": "5.15.212",
"status": "affected",
"version": "5.15.170",
"versionType": "semver"
},
{
"lessThan": "6.1.178",
"status": "affected",
"version": "6.1.115",
"versionType": "semver"
},
{
"lessThan": "6.6.145",
"status": "affected",
"version": "6.6.59",
"versionType": "semver"
},
{
"lessThan": "4.20",
"status": "affected",
"version": "4.19.323",
"versionType": "semver"
},
{
"lessThan": "5.5",
"status": "affected",
"version": "5.4.285",
"versionType": "semver"
},
{
"lessThan": "6.12",
"status": "affected",
"version": "6.11.6",
"versionType": "semver"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"include/net/xfrm.h",
"net/xfrm/xfrm_policy.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.12"
},
{
"lessThan": "6.12",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: validate selector family and prefixlen during match\n\nsyzbot reported a shift-out-of-bounds in xfrm_selector_match()\ndue to AF_UNSPEC selector with large prefixlen (e.g. 128) matched\nagainst IPv4 flow (when XFRM_STATE_AF_UNSPEC is set).\n\nFix this by:\n\n- Rejecting mismatched families in xfrm_selector_match.\n- Returning false in addr4_match if prefixlen \u003e 32.\n- Returning false in addr_match if prefixlen \u003e 128 (prevents overflow)."
}
],
"id": "CVE-2026-72450",
"lastModified": "2026-08-17T06:19:12.517",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
]
},
"published": "2026-08-15T06:22:18.950",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/40f0b1047918539f0b0f795ac65e35336b4c2c78"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/5a03a2ee17e8259dde631ed84fd8322db06cb2ae"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/6d99379c58f7f1c6ab2cc7aba01a4f52d71adcfe"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/78783fefdc8f36879b1a17efa0d3195ea5f2dc5f"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/87a5bbccc7ff4edb3f42fea387124237d2ba91ee"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/a3968ad4195d72c8fddcc6c0ef39da95ac98711a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/bd7f202cf77556cff59f68dc30e4cdf40cb6e33b"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/efa9e3b9f3dea2e1ea4c7edf4edc863faef85986"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
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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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