{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-47585", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-24T15:11:00.731Z", "datePublished": "2024-06-19T14:53:50.780Z", "dateUpdated": "2026-05-11T13:57:23.382Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:57:23.382Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix memory leak in __add_inode_ref()\n\nLine 1169 (#3) allocates a memory chunk for victim_name by kmalloc(),\nbut when the function returns in line 1184 (#4) victim_name allocated\nby line 1169 (#3) is not freed, which will lead to a memory leak.\nThere is a similar snippet of code in this function as allocating a memory\nchunk for victim_name in line 1104 (#1) as well as releasing the memory\nin line 1116 (#2).\n\nWe should kfree() victim_name when the return value of backref_in_log()\nis less than zero and before the function returns in line 1184 (#4).\n\n1057 static inline int __add_inode_ref(struct btrfs_trans_handle *trans,\n1058 \t\t\t\t struct btrfs_root *root,\n1059 \t\t\t\t struct btrfs_path *path,\n1060 \t\t\t\t struct btrfs_root *log_root,\n1061 \t\t\t\t struct btrfs_inode *dir,\n1062 \t\t\t\t struct btrfs_inode *inode,\n1063 \t\t\t\t u64 inode_objectid, u64 parent_objectid,\n1064 \t\t\t\t u64 ref_index, char *name, int namelen,\n1065 \t\t\t\t int *search_done)\n1066 {\n\n1104 \tvictim_name = kmalloc(victim_name_len, GFP_NOFS);\n\t// #1: kmalloc (victim_name-1)\n1105 \tif (!victim_name)\n1106 \t\treturn -ENOMEM;\n\n1112\tret = backref_in_log(log_root, &search_key,\n1113\t\t\tparent_objectid, victim_name,\n1114\t\t\tvictim_name_len);\n1115\tif (ret < 0) {\n1116\t\tkfree(victim_name); // #2: kfree (victim_name-1)\n1117\t\treturn ret;\n1118\t} else if (!ret) {\n\n1169 \tvictim_name = kmalloc(victim_name_len, GFP_NOFS);\n\t// #3: kmalloc (victim_name-2)\n1170 \tif (!victim_name)\n1171 \t\treturn -ENOMEM;\n\n1180 \tret = backref_in_log(log_root, &search_key,\n1181 \t\t\tparent_objectid, victim_name,\n1182 \t\t\tvictim_name_len);\n1183 \tif (ret < 0) {\n1184 \t\treturn ret; // #4: missing kfree (victim_name-2)\n1185 \t} else if (!ret) {\n\n1241 \treturn 0;\n1242 }" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/btrfs/tree-log.c" ], "versions": [ { "version": "d3316c8233bb05e0dd855d30aac347bb8ad76ee4", "lessThan": "005d9292b5b2e71a009f911bd85d755009b37242", "status": "affected", "versionType": "git" }, { "version": "d3316c8233bb05e0dd855d30aac347bb8ad76ee4", "lessThan": "493ff661d434d6bdf02e3a21adae04d7a0b4265d", "status": "affected", "versionType": "git" }, { "version": "d3316c8233bb05e0dd855d30aac347bb8ad76ee4", "lessThan": "f35838a6930296fc1988764cfa54cb3f705c0665", "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/btrfs/tree-log.c" ], "versions": [ { "version": "5.5", "status": "affected" }, { "version": "0", "lessThan": "5.5", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.88", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.11", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.16", "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": "5.5", "versionEndExcluding": "5.10.88" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.15.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.16" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/005d9292b5b2e71a009f911bd85d755009b37242" }, { "url": "https://git.kernel.org/stable/c/493ff661d434d6bdf02e3a21adae04d7a0b4265d" }, { "url": "https://git.kernel.org/stable/c/f35838a6930296fc1988764cfa54cb3f705c0665" } ], "title": "btrfs: fix memory leak in __add_inode_ref()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-06-24T18:08:01.516987Z", "id": "CVE-2021-47585", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-24T18:08:15.557Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:39:59.778Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/005d9292b5b2e71a009f911bd85d755009b37242", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/493ff661d434d6bdf02e3a21adae04d7a0b4265d", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/f35838a6930296fc1988764cfa54cb3f705c0665", "tags": [ "x_transferred" ] } ] } ] } }