CVE-2026-23007

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If protection\ninformation is generated, that portion of the integrity buffer is\nalready initialized. The integrity data is also zeroed if PI generation\nis disabled via sysfs or the PI tuple size is 0. However, this misses\nthe case where PI is generated and the PI tuple size is nonzero, but the\nmetadata size is larger than the PI tuple. In this case, the remainder\n(\"opaque\") of the metadata is left uninitialized.\nGeneralize the BLK_INTEGRITY_CSUM_NONE check to cover any case when the\nmetadata is larger than just the PI tuple."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbloque: poner a cero la porci\u00f3n no-PI del b\u00fafer de integridad autom\u00e1tico\n\nEl b\u00fafer de integridad autogenerado para escrituras necesita ser completamente inicializado antes de ser pasado al dispositivo de bloque subyacente, de lo contrario la memoria no inicializada puede ser le\u00edda por el espacio de usuario o cualquier persona con acceso f\u00edsico al dispositivo de almacenamiento. Si se genera informaci\u00f3n de protecci\u00f3n, esa porci\u00f3n del b\u00fafer de integridad ya est\u00e1 inicializada. Los datos de integridad tambi\u00e9n se ponen a cero si la generaci\u00f3n de PI est\u00e1 deshabilitada a trav\u00e9s de sysfs o el tama\u00f1o de la tupla PI es 0. Sin embargo, esto omite el caso en que se genera PI y el tama\u00f1o de la tupla PI no es cero, pero el tama\u00f1o de los metadatos es mayor que la tupla PI. En este caso, el resto ('opaco') de los metadatos se deja sin inicializar.\nGeneralizar la comprobaci\u00f3n BLK_INTEGRITY_CSUM_NONE para cubrir cualquier caso en que los metadatos sean m\u00e1s grandes que solo la tupla PI."}], "id": "CVE-2026-23007", "lastModified": "2026-11-05T22:17:59.560", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-23007", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T21:18:24.643184Z", "version": "2.0.3"}}]}, "published": "2026-01-25T15:15:55.580", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/765bf0a5880777c04ae98fc2a9f3b995737b3a64"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ca22c566b89164f6e670af56ecc45f47ef3df819"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d6072557b90e0c557df319a56f4a9dc482706d2c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-908"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: block: zero non-PI portion of auto integrity buffer", "id": "2432674", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2432674"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2026-23007", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-01-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23007\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23007\nhttps://lore.kernel.org/linux-cve-announce/2026012536-CVE-2026-23007-38b1@gregkh/T"], "threat_severity": "Low"}

{"analysis": {"en": {"generated_at": "2026-04-18T02:51:45.915746+00:00", "value": {"mitigation_remediation": ["Upgrade the Linux kernel to a patched release that includes the fix for this issue (for example, any kernel version newer than the ones listed in the affected CPE range).", "As a temporary measure, disable integrity protection or set the PI tuple size to zero via the appropriate sysfs interface so the buffer is fully zeroed before being handed to the device. ", "Protect physical access to storage devices and monitor for suspicious read activity that might indicate exploitation."], "summary": {"action": "Immediate Patch", "impact": "Information Disclosure"}, "threat_synthesis": {"affected_systems": "The vulnerability impacts the Linux kernel, specifically the 6.11 series and the 6.19 series release candidates up to rc8, as identified in the CPE catalog. Any system running one of these kernel versions without the patch is susceptible, regardless of distribution. The defect resides in the core block layer code, so all distributions using the affected source code are affected until the fix is applied.", "description_and_impact": "In the Linux kernel block layer, the auto\u2011generated integrity buffer for writes was not fully initialized when the metadata size exceeded the PI tuple. This leaves a segment of the buffer in an uninitialized state that can be read back by userspace or anyone with physical access to the storage device, allowing the disclosure of previously written data. The flaw is a classic uninitialized memory leakage (CWE\u2011908) and poses a confidentiality risk.", "risk_and_exploitability": "The CVSS score of 5.5 indicates moderate severity, while the EPSS score of less than 1% reflects a low probability of exploitation. The flaw is not listed in the CISA KEV catalog, suggesting limited known exploitation. An attacker would need local or physical access to the machine or the block device to read uninitialized metadata; the vulnerability is confined to integrity buffer handling and cannot be leveraged remotely without additional local privileges."}}}}, "created": "2026-04-18T03:00:10.326510+00:00", "updated": "2026-04-18T03:00:10.326520+00:00", "vendors": []}