CVE-2022-49879

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A\ncorrupted filesystem image can be used to hit a BUG() in\next4_rec_len_to_disk(), called from make_indexed_dir().\n\n ------------[ cut here ]------------\n kernel BUG at fs/ext4/ext4.h:2413!\n ...\n RIP: 0010:make_indexed_dir+0x53f/0x5f0\n ...\n Call Trace:\n <TASK>\n ? add_dirent_to_buf+0x1b2/0x200\n ext4_add_entry+0x36e/0x480\n ext4_add_nondir+0x2b/0xc0\n ext4_create+0x163/0x200\n path_openat+0x635/0xe90\n do_filp_open+0xb4/0x160\n ? __create_object.isra.0+0x1de/0x3b0\n ? _raw_spin_unlock+0x12/0x30\n do_sys_openat2+0x91/0x150\n __x64_sys_open+0x6c/0xa0\n do_syscall_64+0x3c/0x80\n entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nThe fix simply adds a call to ext4_check_dir_entry() to validate the\ndirectory entry, returning -EFSCORRUPTED if the entry is invalid."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ext4/namei.c"], "versions": [{"version": "3d0518f4758eca4339e75e5b9dbb7e06a5ce08b4", "lessThan": "2fa24d0274fbf913b56ee31f15bc01168669d909", "status": "affected", "versionType": "git"}, {"version": "3d0518f4758eca4339e75e5b9dbb7e06a5ce08b4", "lessThan": "156451a67b93986fb07c274ef6995ff40766c5ad", "status": "affected", "versionType": "git"}, {"version": "3d0518f4758eca4339e75e5b9dbb7e06a5ce08b4", "lessThan": "999cff2b6ce3b45c08abf793bf55534777421327", "status": "affected", "versionType": "git"}, {"version": "3d0518f4758eca4339e75e5b9dbb7e06a5ce08b4", "lessThan": "ce1ee2c8827fb6493e91acbd50f664cf2a972c3d", "status": "affected", "versionType": "git"}, {"version": "3d0518f4758eca4339e75e5b9dbb7e06a5ce08b4", "lessThan": "17a0bc9bd697f75cfdf9b378d5eb2d7409c91340", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ext4/namei.c"], "versions": [{"version": "2.6.30", "status": "affected"}, {"version": "0", "lessThan": "2.6.30", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.224", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.154", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.78", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.8", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1", "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": "2.6.30", "versionEndExcluding": "5.4.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "5.10.154"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "5.15.78"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.0.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2fa24d0274fbf913b56ee31f15bc01168669d909"}, {"url": "https://git.kernel.org/stable/c/156451a67b93986fb07c274ef6995ff40766c5ad"}, {"url": "https://git.kernel.org/stable/c/999cff2b6ce3b45c08abf793bf55534777421327"}, {"url": "https://git.kernel.org/stable/c/ce1ee2c8827fb6493e91acbd50f664cf2a972c3d"}, {"url": "https://git.kernel.org/stable/c/17a0bc9bd697f75cfdf9b378d5eb2d7409c91340"}], "title": "ext4: fix BUG_ON() when directory entry has invalid rec_len", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2022-49879", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-05T19:51:06.646371Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-05T20:00:10.635Z"}}]}}

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A\ncorrupted filesystem image can be used to hit a BUG() in\next4_rec_len_to_disk(), called from make_indexed_dir().\n\n ------------[ cut here ]------------\n kernel BUG at fs/ext4/ext4.h:2413!\n ...\n RIP: 0010:make_indexed_dir+0x53f/0x5f0\n ...\n Call Trace:\n <TASK>\n ? add_dirent_to_buf+0x1b2/0x200\n ext4_add_entry+0x36e/0x480\n ext4_add_nondir+0x2b/0xc0\n ext4_create+0x163/0x200\n path_openat+0x635/0xe90\n do_filp_open+0xb4/0x160\n ? __create_object.isra.0+0x1de/0x3b0\n ? _raw_spin_unlock+0x12/0x30\n do_sys_openat2+0x91/0x150\n __x64_sys_open+0x6c/0xa0\n do_syscall_64+0x3c/0x80\n entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nThe fix simply adds a call to ext4_check_dir_entry() to validate the\ndirectory entry, returning -EFSCORRUPTED if the entry is invalid."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.224", "versionStartIncluding": "2.6.30"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.154", "versionStartIncluding": "2.6.30"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.78", "versionStartIncluding": "2.6.30"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.0.8", "versionStartIncluding": "2.6.30"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1", "versionStartIncluding": "2.6.30"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:08:30.756Z"}}}, "cveMetadata": {"cveId": "CVE-2022-49879", "state": "PUBLISHED", "dateUpdated": "2026-11-05T20:00:10.635Z", "dateReserved": "2025-05-01T14:05:17.239Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-05-01T14:10:27.117Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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A\ncorrupted filesystem image can be used to hit a BUG() in\next4_rec_len_to_disk(), called from make_indexed_dir().\n\n ------------[ cut here ]------------\n kernel BUG at fs/ext4/ext4.h:2413!\n ...\n RIP: 0010:make_indexed_dir+0x53f/0x5f0\n ...\n Call Trace:\n <TASK>\n ? add_dirent_to_buf+0x1b2/0x200\n ext4_add_entry+0x36e/0x480\n ext4_add_nondir+0x2b/0xc0\n ext4_create+0x163/0x200\n path_openat+0x635/0xe90\n do_filp_open+0xb4/0x160\n ? __create_object.isra.0+0x1de/0x3b0\n ? _raw_spin_unlock+0x12/0x30\n do_sys_openat2+0x91/0x150\n __x64_sys_open+0x6c/0xa0\n do_syscall_64+0x3c/0x80\n entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nThe fix simply adds a call to ext4_check_dir_entry() to validate the\ndirectory entry, returning -EFSCORRUPTED if the entry is invalid."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: correcci\u00f3n de BUG_ON() cuando la entrada de directorio tiene un rec_len no v\u00e1lido El campo rec_len en la entrada de directorio debe ser un m\u00faltiplo de 4. Una imagen de sistema de archivos da\u00f1ada se puede usar para generar un BUG() en ext4_rec_len_to_disk(), llamado desde make_indexed_dir(). ------------[ cortar aqu\u00ed ]------------ \u00a1ERROR del kernel en fs/ext4/ext4.h:2413! ... RIP: 0010:make_indexed_dir+0x53f/0x5f0 ... Rastreo de llamadas: ? add_dirent_to_buf+0x1b2/0x200 ext4_add_entry+0x36e/0x480 ext4_add_nondir+0x2b/0xc0 ext4_create+0x163/0x200 path_openat+0x635/0xe90 do_filp_open+0xb4/0x160 ? __create_object.isra.0+0x1de/0x3b0 ? _raw_spin_unlock+0x12/0x30 do_sys_openat2+0x91/0x150 __x64_sys_open+0x6c/0xa0 do_syscall_64+0x3c/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 La soluci\u00f3n simplemente agrega una llamada a ext4_check_dir_entry() para validar la entrada del directorio, devolviendo -EFSCORRUPTED si la entrada no es v\u00e1lida."}], "id": "CVE-2022-49879", "lastModified": "2026-11-05T20:17:16.900", "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-2022-49879", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T19:51:06.646371Z", "version": "2.0.3"}}]}, "published": "2025-05-01T15:16:12.857", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/156451a67b93986fb07c274ef6995ff40766c5ad"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/17a0bc9bd697f75cfdf9b378d5eb2d7409c91340"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2fa24d0274fbf913b56ee31f15bc01168669d909"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/999cff2b6ce3b45c08abf793bf55534777421327"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ce1ee2c8827fb6493e91acbd50f664cf2a972c3d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-617"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ext4: fix BUG_ON() when directory entry has invalid rec_len", "id": "2363436", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363436"}, "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": ["In the Linux kernel, the following vulnerability has been resolved:\next4: fix BUG_ON() when directory entry has invalid rec_len\nThe rec_len field in the directory entry has to be a multiple of 4. A\ncorrupted filesystem image can be used to hit a BUG() in\next4_rec_len_to_disk(), called from make_indexed_dir().\n------------[ cut here ]------------\nkernel BUG at fs/ext4/ext4.h:2413!\n...\nRIP: 0010:make_indexed_dir+0x53f/0x5f0\n...\nCall Trace:\n<TASK>\n? add_dirent_to_buf+0x1b2/0x200\next4_add_entry+0x36e/0x480\next4_add_nondir+0x2b/0xc0\next4_create+0x163/0x200\npath_openat+0x635/0xe90\ndo_filp_open+0xb4/0x160\n? __create_object.isra.0+0x1de/0x3b0\n? _raw_spin_unlock+0x12/0x30\ndo_sys_openat2+0x91/0x150\n__x64_sys_open+0x6c/0xa0\ndo_syscall_64+0x3c/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\nThe fix simply adds a call to ext4_check_dir_entry() to validate the\ndirectory entry, returning -EFSCORRUPTED if the entry is invalid."], "name": "CVE-2022-49879", "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": "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": "2025-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49879\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49879\nhttps://lore.kernel.org/linux-cve-announce/2025050154-CVE-2022-49879-e897@gregkh/T"], "statement": "This issue in the ext4 filesystem could trigger a kernel panic (BUG_ON()) when encountering a directory entry with a corrupted rec_len field. Such a situation may occur when mounting or manipulating a deliberately malformed or corrupted ext4 image. The kernel previously failed to validate the rec_len value, which must be a multiple of 4. An attacker with the ability to supply or modify ext4 filesystem images (e.g., through removable media or crafted disk images in virtualized environments) could cause a denial of service via kernel crash during directory operations.", "threat_severity": "Moderate"}

{}