FKIE_CVE-2025-68820
Vulnerability from fkie_nvd - Published: 2026-01-13 16:16 - Updated: 2026-06-17 09:59
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
ext4: xattr: fix null pointer deref in ext4_raw_inode()
If ext4_get_inode_loc() fails (e.g. if it returns -EFSCORRUPTED),
iloc.bh will remain set to NULL. Since ext4_xattr_inode_dec_ref_all()
lacks error checking, this will lead to a null pointer dereference
in ext4_raw_inode(), called right after ext4_get_inode_loc().
Found by Linux Verification Center (linuxtesting.org) with SVACE.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/ext4/xattr.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "b72a3476f0c97d02f63a6e9fff127348d55436f6",
"status": "affected",
"version": "76c365fa7e2a8bb85f0190cdb4b8cdc99b2fdce3",
"versionType": "git"
},
{
"lessThan": "3d8d22e75f7edfa0b30ff27330fd6a1285d594c3",
"status": "affected",
"version": "f737418b6de31c962c7192777ee4018906975383",
"versionType": "git"
},
{
"lessThan": "190ad0f22ba49f1101182b80e3af50ca2ddfe72f",
"status": "affected",
"version": "cf9291a3449b04688b81e32621e88de8f4314b54",
"versionType": "git"
},
{
"lessThan": "b5d942922182e82724b7152cb998f540132885ec",
"status": "affected",
"version": "362a90cecd36e8a5c415966d0b75b04a0270e4dd",
"versionType": "git"
},
{
"lessThan": "5b154e901fda2e98570b8f426a481f5740097dc2",
"status": "affected",
"version": "eb59cc31b6ea076021d14b04e7faab1636b87d0e",
"versionType": "git"
},
{
"lessThan": "ce5f54c065a4a7cbb92787f4f140917112350142",
"status": "affected",
"version": "c8e008b60492cf6fd31ef127aea6d02fd3d314cd",
"versionType": "git"
},
{
"lessThan": "b97cb7d6a051aa6ebd57906df0e26e9e36c26d14",
"status": "affected",
"version": "c8e008b60492cf6fd31ef127aea6d02fd3d314cd",
"versionType": "git"
},
{
"status": "affected",
"version": "6aff941cb0f7d0c897c3698ad2e30672709135e3",
"versionType": "git"
},
{
"status": "affected",
"version": "3bc6317033f365ce578eb6039445fb66162722fd",
"versionType": "git"
},
{
"status": "affected",
"version": "836e625b03a666cf93ff5be328c8cb30336db872",
"versionType": "git"
},
{
"lessThan": "5.10.248",
"status": "affected",
"version": "5.10.237",
"versionType": "semver"
},
{
"lessThan": "5.15.198",
"status": "affected",
"version": "5.15.181",
"versionType": "semver"
},
{
"lessThan": "6.1.160",
"status": "affected",
"version": "6.1.135",
"versionType": "semver"
},
{
"lessThan": "6.6.120",
"status": "affected",
"version": "6.6.88",
"versionType": "semver"
},
{
"lessThan": "6.12.64",
"status": "affected",
"version": "6.12.24",
"versionType": "semver"
},
{
"lessThan": "5.5",
"status": "affected",
"version": "5.4.293",
"versionType": "semver"
},
{
"lessThan": "6.14",
"status": "affected",
"version": "6.13.12",
"versionType": "semver"
},
{
"lessThan": "6.15",
"status": "affected",
"version": "6.14.3",
"versionType": "semver"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/ext4/xattr.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.15"
},
{
"lessThan": "6.15",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.248",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.198",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.160",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.120",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.64",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.3",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.19",
"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\next4: xattr: fix null pointer deref in ext4_raw_inode()\n\nIf ext4_get_inode_loc() fails (e.g. if it returns -EFSCORRUPTED),\niloc.bh will remain set to NULL. Since ext4_xattr_inode_dec_ref_all()\nlacks error checking, this will lead to a null pointer dereference\nin ext4_raw_inode(), called right after ext4_get_inode_loc().\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\next4: xattr: corregir desreferencia de puntero nulo en ext4_raw_inode()\n\nSi ext4_get_inode_loc() falla (p. ej., si devuelve -EFSCORRUPTED), iloc.bh permanecer\u00e1 establecido en NULL. Dado que ext4_xattr_inode_dec_ref_all() carece de comprobaci\u00f3n de errores, esto conducir\u00e1 a una desreferencia de puntero nulo en ext4_raw_inode(), llamada justo despu\u00e9s de ext4_get_inode_loc().\n\nEncontrado por Linux Verification Center (linuxtesting.org) con SVACE."
}
],
"id": "CVE-2025-68820",
"lastModified": "2026-06-17T09:59:40.443",
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-68820",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-16T16:55:32.991979Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-01-13T16:16:04.327",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/190ad0f22ba49f1101182b80e3af50ca2ddfe72f"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/3d8d22e75f7edfa0b30ff27330fd6a1285d594c3"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/5b154e901fda2e98570b8f426a481f5740097dc2"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/b5d942922182e82724b7152cb998f540132885ec"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/b72a3476f0c97d02f63a6e9fff127348d55436f6"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/b97cb7d6a051aa6ebd57906df0e26e9e36c26d14"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/ce5f54c065a4a7cbb92787f4f140917112350142"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
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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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