cve/published/2023/CVE-2023-52779.json

{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs: Pass AT_GETATTR_NOSEC flag to getattr interface function\n\nWhen vfs_getattr_nosec() calls a filesystem's getattr interface function\nthen the 'nosec' should propagate into this function so that\nvfs_getattr_nosec() can again be called from the filesystem's gettattr\nrather than vfs_getattr(). The latter would add unnecessary security\nchecks that the initial vfs_getattr_nosec() call wanted to avoid.\nTherefore, introduce the getattr flag GETATTR_NOSEC and allow to pass\nwith the new getattr_flags parameter to the getattr interface function.\nIn overlayfs and ecryptfs use this flag to determine which one of the\ntwo functions to call.\n\nIn a recent code change introduced to IMA vfs_getattr_nosec() ended up\ncalling vfs_getattr() in overlayfs, which in turn called\nsecurity_inode_getattr() on an exiting process that did not have\ncurrent->fs set anymore, which then caused a kernel NULL pointer\ndereference. With this change the call to security_inode_getattr() can\nbe avoided, thus avoiding the NULL pointer dereference."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "fs/ecryptfs/inode.c",
                  "fs/overlayfs/inode.c",
                  "fs/overlayfs/overlayfs.h",
                  "fs/stat.c",
                  "include/uapi/linux/fcntl.h"
               ],
               "versions": [
                  {
                     "version": "db1d1e8b9867aae5c3e61ad7859abfcc4a6fd6c7",
                     "lessThan": "3fb0fa08641903304b9d81d52a379ff031dc41d4",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "db1d1e8b9867aae5c3e61ad7859abfcc4a6fd6c7",
                     "lessThan": "8a924db2d7b5eb69ba08b1a0af46e9f1359a9bdf",
                     "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/ecryptfs/inode.c",
                  "fs/overlayfs/inode.c",
                  "fs/overlayfs/overlayfs.h",
                  "fs/stat.c",
                  "include/uapi/linux/fcntl.h"
               ],
               "versions": [
                  {
                     "version": "6.5",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "6.5",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "6.6.4",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "6.7",
                     "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": "6.5",
                           "versionEndExcluding": "6.6.4"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "6.5",
                           "versionEndExcluding": "6.7"
                        }
                     ]
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/3fb0fa08641903304b9d81d52a379ff031dc41d4"
            },
            {
               "url": "https://git.kernel.org/stable/c/8a924db2d7b5eb69ba08b1a0af46e9f1359a9bdf"
            }
         ],
         "title": "fs: Pass AT_GETATTR_NOSEC flag to getattr interface function",
         "x_generator": {
            "engine": "bippy-1.2.0"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2023-52779",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}