| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nceph: fix memory leak in ceph_mds_auth_match()\n\nWe now free the temporary target path substring allocation on every\npossible branch, instead of omitting the default branch. In some\ncases, a memory leak occured, which could rapidly crash the system\n(depending on how many file accesses were attempted).\n\nThis was detected in production because it caused a continuous memory\ngrowth, eventually triggering kernel OOM and completely hard-locking\nthe kernel.\n\nRelevant kmemleak stacktrace:\n\n unreferenced object 0xffff888131e69900 (size 128):\n comm \"git\", pid 66104, jiffies 4295435999\n hex dump (first 32 bytes):\n 76 6f 6c 75 6d 65 73 2f 63 6f 6e 74 61 69 6e 65 volumes/containe\n 72 73 2f 67 69 74 65 61 2f 67 69 74 65 61 2f 67 rs/gitea/gitea/g\n backtrace (crc 2f3bb450):\n [<ffffffffaa68fb49>] __kmalloc_noprof+0x359/0x510\n [<ffffffffc32bf1df>] ceph_mds_check_access+0x5bf/0x14e0 [ceph]\n [<ffffffffc3235722>] ceph_open+0x312/0xd80 [ceph]\n [<ffffffffaa7dd786>] do_dentry_open+0x456/0x1120\n [<ffffffffaa7e3729>] vfs_open+0x79/0x360\n [<ffffffffaa832875>] path_openat+0x1de5/0x4390\n [<ffffffffaa834fcc>] do_filp_open+0x19c/0x3c0\n [<ffffffffaa7e44a1>] do_sys_openat2+0x141/0x180\n [<ffffffffaa7e4945>] __x64_sys_open+0xe5/0x1a0\n [<ffffffffac2cc2f7>] do_syscall_64+0xb7/0x210\n [<ffffffffac400130>] entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nIt can be triggered by mouting a subdirectory of a CephFS filesystem,\nand then trying to access files on this subdirectory with an auth token\nusing a path-scoped capability:\n\n $ ceph auth get client.services\n [client.services]\n key = REDACTED\n caps mds = \"allow rw fsname=cephfs path=/volumes/\"\n caps mon = \"allow r fsname=cephfs\"\n caps osd = \"allow rw tag cephfs data=cephfs\"\n\n $ cat /proc/self/mounts\n services@[REDACTED].cephfs=/volumes/containers /ceph/containers ceph rw,noatime,name=services,secret=<hidden>,ms_mode=prefer-crc,mount_timeout=300,acl,mon_addr=[REDACTED]:3300,recover_session=clean 0 0\n\n $ seq 1 1000000 | xargs -P32 --replace={} touch /ceph/containers/file-{} && \\\n seq 1 1000000 | xargs -P32 --replace={} cat /ceph/containers/file-{}\n\n[ idryomov: combine if statements, rename rc to path_matched and make\n it a bool, formatting ]" |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "fs/ceph/mds_client.c" |
| ], |
| "versions": [ |
| { |
| "version": "596afb0b8933ba6ed7227adcc538db26feb25c74", |
| "lessThan": "146109fe936ac07f8f60cd6267543688985b96bc", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "596afb0b8933ba6ed7227adcc538db26feb25c74", |
| "lessThan": "2b6086c5efe5c7bd6e0eb440d96c26ca0d20d9d7", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "596afb0b8933ba6ed7227adcc538db26feb25c74", |
| "lessThan": "3b7d93db450e9d8ead80d75e2a303248f1528c35", |
| "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/ceph/mds_client.c" |
| ], |
| "versions": [ |
| { |
| "version": "6.10", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "6.10", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.12.14", |
| "lessThanOrEqual": "6.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.13.3", |
| "lessThanOrEqual": "6.13.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.14", |
| "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": "6.10", |
| "versionEndExcluding": "6.12.14" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.10", |
| "versionEndExcluding": "6.13.3" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.10", |
| "versionEndExcluding": "6.14" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/146109fe936ac07f8f60cd6267543688985b96bc" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/2b6086c5efe5c7bd6e0eb440d96c26ca0d20d9d7" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/3b7d93db450e9d8ead80d75e2a303248f1528c35" |
| } |
| ], |
| "title": "ceph: fix memory leak in ceph_mds_auth_match()", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2025-21737", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
