CVE-2022-49348

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/ext4/super.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "cc5b09cb6dacd4b32640537929ab4ee8fb2b9e04", "status": "affected", "version": "8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2", "versionType": "git"}, {"lessThan": "b99fd73418350dea360da8311e87a6a7b0e15a4c", "status": "affected", "version": "8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2", "versionType": "git"}, {"lessThan": "af2f1932743fb52ebcb008ad7ac500d9df0aa796", "status": "affected", "version": "8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2", "versionType": "git"}, {"lessThan": "55b4dbb29054a05d839562f6d635ce05669b016d", "status": "affected", "version": "8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2", "versionType": "git"}, {"lessThan": "c878bea3c9d724ddfa05a813f30de3d25a0ba83f", "status": "affected", "version": "8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/ext4/super.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.10"}, {"lessThan": "5.10", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.121", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.46", "versionType": "semver"}, {"lessThanOrEqual": "5.17.*", "status": "unaffected", "version": "5.17.14", "versionType": "semver"}, {"lessThanOrEqual": "5.18.*", "status": "unaffected", "version": "5.18.3", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "5.19", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "DB0B2C71-35B4-4946-8040-56348E759B48", "versionEndExcluding": "5.10.121", "versionStartIncluding": "5.10", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "20D41697-0E8B-4B7D-8842-F17BF2AA21E1", "versionEndExcluding": "5.15.46", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "15E2DD33-2255-4B76-9C15-04FF8CBAB252", "versionEndExcluding": "5.17.14", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "8E122216-2E9E-4B3E-B7B8-D575A45BA3C2", "versionEndExcluding": "5.18.3", "versionStartIncluding": "5.18", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: filter out EXT4_FC_REPLAY from on-disk superblock field s_state\n\nThe EXT4_FC_REPLAY bit in sbi->s_mount_state is used to indicate that\nwe are in the middle of replay the fast commit journal. This was\nactually a mistake, since the sbi->s_mount_info is initialized from\nes->s_state. Arguably s_mount_state is misleadingly named, but the\nname is historical --- s_mount_state and s_state dates back to ext2.\n\nWhat should have been used is the ext4_{set,clear,test}_mount_flag()\ninline functions, which sets EXT4_MF_* bits in sbi->s_mount_flags.\n\nThe problem with using EXT4_FC_REPLAY is that a maliciously corrupted\nsuperblock could result in EXT4_FC_REPLAY getting set in\ns_mount_state. This bypasses some sanity checks, and this can trigger\na BUG() in ext4_es_cache_extent(). As a easy-to-backport-fix, filter\nout the EXT4_FC_REPLAY bit for now. We should eventually transition\naway from EXT4_FC_REPLAY to something like EXT4_MF_REPLAY."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: filtrar EXT4_FC_REPLAY del campo s_state del superbloque en disco El bit EXT4_FC_REPLAY en sbi->s_mount_state se usa para indicar que estamos en medio de la reproducci\u00f3n del diario de confirmaci\u00f3n r\u00e1pida. En realidad, esto fue un error, ya que sbi->s_mount_info se inicializa desde es->s_state. Podr\u00eda decirse que s_mount_state tiene un nombre enga\u00f1oso, pero el nombre es hist\u00f3rico --- s_mount_state y s_state se remontan a ext2. Lo que se deber\u00eda haber usado son las funciones en l\u00ednea ext4_{set,clear,test}_mount_flag(), que establecen los bits EXT4_MF_* en sbi->s_mount_flags. El problema con el uso de EXT4_FC_REPLAY es que un superbloque da\u00f1ado maliciosamente podr\u00eda provocar que EXT4_FC_REPLAY se establezca en s_mount_state. Esto evita algunas comprobaciones de cordura y puede desencadenar un error en ext4_es_cache_extent(). Como soluci\u00f3n f\u00e1cil de implementar, filtre el bit EXT4_FC_REPLAY por ahora. Deber\u00edamos dejar de usar EXT4_FC_REPLAY para pasar a algo como EXT4_MF_REPLAY."}], "id": "CVE-2022-49348", "lastModified": "2026-06-17T05:17:47.273", "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"}]}, "published": "2025-02-26T07:01:11.533", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/55b4dbb29054a05d839562f6d635ce05669b016d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/af2f1932743fb52ebcb008ad7ac500d9df0aa796"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b99fd73418350dea360da8311e87a6a7b0e15a4c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c878bea3c9d724ddfa05a813f30de3d25a0ba83f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cc5b09cb6dacd4b32640537929ab4ee8fb2b9e04"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2022:8267", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-162.6.1.el9_1", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-11-15T00:00:00Z"}, {"advisory": "RHSA-2022:8267", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-162.6.1.el9_1", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-11-15T00:00:00Z"}], "bugzilla": {"description": "kernel: ext4: filter out EXT4_FC_REPLAY from on-disk superblock field s_state", "id": "2348038", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348038"}, "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": "verified"}, "cwe": "CWE-617", "details": ["In the Linux kernel, the following vulnerability has been resolved:\next4: filter out EXT4_FC_REPLAY from on-disk superblock field s_state\nThe EXT4_FC_REPLAY bit in sbi->s_mount_state is used to indicate that\nwe are in the middle of replay the fast commit journal. This was\nactually a mistake, since the sbi->s_mount_info is initialized from\nes->s_state. Arguably s_mount_state is misleadingly named, but the\nname is historical --- s_mount_state and s_state dates back to ext2.\nWhat should have been used is the ext4_{set,clear,test}_mount_flag()\ninline functions, which sets EXT4_MF_* bits in sbi->s_mount_flags.\nThe problem with using EXT4_FC_REPLAY is that a maliciously corrupted\nsuperblock could result in EXT4_FC_REPLAY getting set in\ns_mount_state. This bypasses some sanity checks, and this can trigger\na BUG() in ext4_es_cache_extent(). As a easy-to-backport-fix, filter\nout the EXT4_FC_REPLAY bit for now. We should eventually transition\naway from EXT4_FC_REPLAY to something like EXT4_MF_REPLAY.", "A flaw was found in the ext4 module in the Linux kernel. A specially crafted filesystem can cause an assertion failure when a specific operation is performed, possibly resulting in system instability and a denial of service."], "mitigation": {"lang": "en:us", "value": "Do not mount untrusted ext4 filesystems."}, "name": "CVE-2022-49348", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49348\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49348\nhttps://lore.kernel.org/linux-cve-announce/2025022642-CVE-2022-49348-d5db@gregkh/T"], "statement": "This issue has been fixed in Red Hat Enterprise Linux 9.1 via RHSA-2022:8267 [1].\n[1]. https://access.redhat.com/errata/RHSA-2022:8267", "threat_severity": "Moderate"}

{}