CVE-2025-68820

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.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/190ad0f22ba49f1101182b80e3af50ca2ddfe72f
https://git.kernel.org/stable/c/3d8d22e75f7edfa0b30ff27330fd6a1285d594c3
https://git.kernel.org/stable/c/5b154e901fda2e98570b8f426a481f5740097dc2
https://git.kernel.org/stable/c/b5d942922182e82724b7152cb998f540132885ec
https://git.kernel.org/stable/c/b72a3476f0c97d02f63a6e9fff127348d55436f6
https://git.kernel.org/stable/c/b97cb7d6a051aa6ebd57906df0e26e9e36c26d14
https://git.kernel.org/stable/c/ce5f54c065a4a7cbb92787f4f140917112350142
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-457936.html

Configurations

No configuration.

History

19 Oct 2026, 19:17

Type	Values Removed	Values Added
CWE		CWE-476

15 Oct 2026, 02:18

Type	Values Removed	Values Added
References		() https://cert-portal.siemens.com/productcert/html/ssa-457936.html -

Information

Published : 2026-01-13 16:16

Updated : 2026-10-19 19:17

NVD link : CVE-2025-68820

Mitre link : CVE-2025-68820

CVE.ORG link : CVE-2025-68820

JSON object : View

Products Affected

No product.

CWE

CWE-476

NULL Pointer Dereference

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"lessThan": "5.10.248", "versionType": "semver"}, {"status": "affected", "version": "5.15.181", "lessThan": "5.15.198", "versionType": "semver"}, {"status": "affected", "version": "6.1.135", "lessThan": "6.1.160", "versionType": "semver"}, {"status": "affected", "version": "6.6.88", "lessThan": "6.6.120", "versionType": "semver"}, {"status": "affected", "version": "6.12.24", "lessThan": "6.12.64", "versionType": "semver"}, {"status": "affected", "version": "5.4.293", "lessThan": "5.5", "versionType": "semver"}, {"status": "affected", "version": "6.13.12", "lessThan": "6.14", "versionType": "semver"}, {"status": "affected", "version": "6.14.3", "lessThan": "6.15", "versionType": "semver"}], "programFiles": ["fs/ext4/xattr.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.15"}, {"status": "unaffected", "version": "0", "lessThan": "6.15", 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"https://cert-portal.siemens.com/productcert/html/ssa-019113.html", "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html", "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-476"}]}], "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."}], "lastModified": "2026-10-19T19:17:07.390", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}