{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2021-47353", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-21T14:28:16.986Z", "datePublished": "2024-05-21T14:35:57.122Z", "dateUpdated": "2024-08-04T05:32:08.447Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-29T05:06:29.776Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudf: Fix NULL pointer dereference in udf_symlink function\n\nIn function udf_symlink, epos.bh is assigned with the value returned\nby udf_tgetblk. The function udf_tgetblk is defined in udf/misc.c\nand returns the value of sb_getblk function that could be NULL.\nThen, epos.bh is used without any check, causing a possible\nNULL pointer dereference when sb_getblk fails.\n\nThis fix adds a check to validate the value of epos.bh."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/udf/namei.c"], "versions": [{"version": "1da177e4c3f4", "lessThan": "2f3d9ddd32a2", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "371566f63cbd", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "baea588a42d6", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "3638705ecd5a", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "80d505aee639", "status": "affected", "versionType": "git"}, 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{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2021-47353", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-21T14:28:16.986Z", "datePublished": "2024-05-21T14:35:57.122Z", "dateUpdated": "2024-06-04T17:14:54.819Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-29T05:06:29.776Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudf: Fix NULL pointer dereference in udf_symlink function\n\nIn function udf_symlink, epos.bh is assigned with the value returned\nby udf_tgetblk. The function udf_tgetblk is defined in udf/misc.c\nand returns the value of sb_getblk function that could be NULL.\nThen, epos.bh is used without any check, causing a possible\nNULL pointer dereference when sb_getblk fails.\n\nThis fix adds a check to validate the value of epos.bh."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/udf/namei.c"], "versions": [{"version": "1da177e4c3f4", "lessThan": "2f3d9ddd32a2", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "371566f63cbd", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "baea588a42d6", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "3638705ecd5a", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "80d505aee639", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "21bf1414580c", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "aebed6b19e51", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "5150877e4d99", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "fa236c2b2d44", "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/udf/namei.c"], "versions": [{"version": "4.4.276", "lessThanOrEqual": "4.4.*", "status": "unaffected", "versionType": "custom"}, {"version": "4.9.276", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "custom"}, {"version": "4.14.240", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "custom"}, {"version": "4.19.198", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom"}, {"version": "5.4.133", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom"}, {"version": "5.10.51", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom"}, {"version": "5.12.18", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "custom"}, {"version": "5.13.3", "lessThanOrEqual": "5.13.*", "status": "unaffected", "versionType": "custom"}, {"version": "5.14", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c"}, {"url": "https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9"}, {"url": "https://git.kernel.org/stable/c/baea588a42d675e35daeaddd10fbc9700550bc4d"}, {"url": "https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5"}, {"url": "https://git.kernel.org/stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68b"}, {"url": "https://git.kernel.org/stable/c/21bf1414580c36ffc8d8de043beb3508cf812238"}, {"url": "https://git.kernel.org/stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02"}, {"url": "https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6"}, {"url": "https://git.kernel.org/stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43"}], "title": "udf: Fix NULL pointer dereference in udf_symlink function", "x_generator": {"engine": "bippy-a5840b7849dd"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47353", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-05-23T19:03:03.353127Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-05-23T19:03:32.344Z"}, "title": "CISA ADP Vulnrichment"}]}}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudf: Fix NULL pointer dereference in udf_symlink function\n\nIn function udf_symlink, epos.bh is assigned with the value returned\nby udf_tgetblk. The function udf_tgetblk is defined in udf/misc.c\nand returns the value of sb_getblk function that could be NULL.\nThen, epos.bh is used without any check, causing a possible\nNULL pointer dereference when sb_getblk fails.\n\nThis fix adds a check to validate the value of epos.bh."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: udf: Se corrigi\u00f3 la desreferencia del puntero NULL en la funci\u00f3n udf_symlink. En la funci\u00f3n udf_symlink, a epos.bh se le asigna el valor devuelto por udf_tgetblk. La funci\u00f3n udf_tgetblk est\u00e1 definida en udf/misc.c y devuelve el valor de la funci\u00f3n sb_getblk que podr\u00eda ser NULL. Luego, epos.bh se usa sin ninguna verificaci\u00f3n, lo que provoca una posible desreferencia del puntero NULL cuando falla sb_getblk. Esta soluci\u00f3n agrega una verificaci\u00f3n para validar el valor de epos.bh."}], "id": "CVE-2021-47353", "lastModified": "2024-05-21T16:54:26.047", "metrics": {}, "published": "2024-05-21T15:15:21.693", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/21bf1414580c36ffc8d8de043beb3508cf812238"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/baea588a42d675e35daeaddd10fbc9700550bc4d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"affected_release": [{"advisory": "RHSA-2024:4352", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.8.1.rt7.349.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-07-08T00:00:00Z"}, {"advisory": "RHSA-2024:4211", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.8.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-07-02T00:00:00Z"}], "bugzilla": {"description": "kernel: udf: Fix NULL pointer dereference in udf_symlink function", "id": "2282400", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282400"}, "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-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nudf: Fix NULL pointer dereference in udf_symlink function\nIn function udf_symlink, epos.bh is assigned with the value returned\nby udf_tgetblk. The function udf_tgetblk is defined in udf/misc.c\nand returns the value of sb_getblk function that could be NULL.\nThen, epos.bh is used without any check, causing a possible\nNULL pointer dereference when sb_getblk fails.\nThis fix adds a check to validate the value of epos.bh.", "A vulnerability was found in the Linux kernel's UDF file system driver, where the udf_symlink function can dereference a NULL pointer. This occurs because the function uses a value returned from udf_tgetblk without checking if it is NULL, potentially causing system crashes if sb_getblk fails."], "mitigation": {"lang": "en:us", "value": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible."}, "name": "CVE-2021-47353", "package_state": [{"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: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": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47353\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47353\nhttps://lore.kernel.org/linux-cve-announce/2024052141-CVE-2021-47353-8d3a@gregkh/T"], "statement": "This vulnerability is rated as a moderate severity because it can lead to system crashes due to a NULL pointer dereference, but it requires specific conditions related to file system operations.", "threat_severity": "Moderate", "upstream_fix": "kernel 4.4.276, kernel 4.9.276, kernel 4.14.240, kernel 4.19.198, kernel 5.4.133, kernel 5.10.51, kernel 5.12.18, kernel 5.13.3, kernel 5.14"}