CVE-2024-48881

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c->root, it is possible c->root is NULL as what\nit is initialized. __bch_btree_node_alloc() never returns NULL but\nc->root is possible to be NULL at above line 1721.\n\nThis patch replaces IS_ERR() by IS_ERR_OR_NULL() to fix this."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/bcache/super.c"], "versions": [{"version": "0729029e647234fa1a94376b6edffec5c2cd75f6", "lessThan": "4379c5828492a4c2a651c8f826a01453bd2b80b0", "status": "affected", "versionType": "git"}, {"version": "db9439cef0b5efccf8021fe89f4953e0f901e85b", "lessThan": "336e30f32ae7c043fde0f6fa21586ff30bea9fe2", "status": "affected", "versionType": "git"}, {"version": "991e9c186a8ac6ab272a86e0ddc6f9733c38b867", "lessThan": "fb5fee35bdd18316a84b5f30881a24e1415e1464", "status": "affected", "versionType": "git"}, {"version": "68118c339c6e1e16ae017bef160dbe28a27ae9c8", "lessThan": 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"lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.66", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.5", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.251", "versionEndExcluding": "5.4.287"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.188", "versionEndExcluding": "5.10.231"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.121", "versionEndExcluding": "5.15.174"}, {"vulnerable": true, "criteria": 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(!IS_ERR_OR_NULL(c->root))\n1722 list_add(&c->root->list, &c->btree_cache);\n\n>From the above code in cache_set_flush(), if previous registration code\nfails before allocating c->root, it is possible c->root is NULL as what\nit is initialized. __bch_btree_node_alloc() never returns NULL but\nc->root is possible to be NULL at above line 1721.\n\nThis patch replaces IS_ERR() by IS_ERR_OR_NULL() to fix this."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bcache: revertir el reemplazo de IS_ERR_OR_NULL con IS_ERR nuevamente. El commit 028ddcac477b (\"bcache: eliminar la comprobaci\u00f3n innecesaria del punto NULL en las asignaciones de nodos\") conduce a una deferencia de puntero NULL en cache_set_flush(). 1721 if (!IS_ERR_OR_NULL(c->root)) 1722 list_add(&c->root->list, &c->btree_cache); >Del c\u00f3digo anterior en cache_set_flush(), si el c\u00f3digo de registro anterior falla antes de asignar c->root, es posible que c->root sea NULL como lo que se inicializa. __bch_btree_node_alloc() nunca devuelve NULL, pero es posible que c->root sea NULL en la l\u00ednea 1721 anterior. Este parche reemplaza IS_ERR() por IS_ERR_OR_NULL() para solucionar esto."}], "id": "CVE-2024-48881", "lastModified": "2026-10-15T01:18:58.480", "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"}, {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-48881", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T19:55:37.185480Z", "version": "2.0.3"}}]}, "published": "2025-01-11T13:15:23.437", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/336e30f32ae7c043fde0f6fa21586ff30bea9fe2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4379c5828492a4c2a651c8f826a01453bd2b80b0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5202391970ffbf81975251b3526b890ba027b715"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5e0e913624bcd24f3de414475018d3023f060ee1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b2e382ae12a63560fca35050498e19e760adf8c0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cc05aa2c0117e20fa25a3c0d915f98b8f2e78667"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fb5fee35bdd18316a84b5f30881a24e1415e1464"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-355557.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-398330.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-476"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: bcache: revert replacing IS_ERR_OR_NULL with IS_ERR again", "id": "2337120", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2337120"}, "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"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbcache: revert replacing IS_ERR_OR_NULL with IS_ERR again\nCommit 028ddcac477b (\"bcache: Remove unnecessary NULL point check in\nnode allocations\") leads a NULL pointer deference in cache_set_flush().\n1721 if (!IS_ERR_OR_NULL(c->root))\n1722 list_add(&c->root->list, &c->btree_cache);\n>From the above code in cache_set_flush(), if previous registration code\nfails before allocating c->root, it is possible c->root is NULL as what\nit is initialized. __bch_btree_node_alloc() never returns NULL but\nc->root is possible to be NULL at above line 1721.\nThis patch replaces IS_ERR() by IS_ERR_OR_NULL() to fix this."], "name": "CVE-2024-48881", "package_state": [{"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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-01-11T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-48881\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-48881\nhttps://lore.kernel.org/linux-cve-announce/2025011121-CVE-2024-48881-c4e5@gregkh/T"], "threat_severity": "Moderate"}

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