{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlandlock: Don't lose track of restrictions on cred_transfer\n\nWhen a process' cred struct is replaced, this _almost_ always invokes\nthe cred_prepare LSM hook; but in one special case (when\nKEYCTL_SESSION_TO_PARENT updates the parent's credentials), the\ncred_transfer LSM hook is used instead.  Landlock only implements the\ncred_prepare hook, not cred_transfer, so KEYCTL_SESSION_TO_PARENT causes\nall information on Landlock restrictions to be lost.\n\nThis basically means that a process with the ability to use the fork()\nand keyctl() syscalls can get rid of all Landlock restrictions on\nitself.\n\nFix it by adding a cred_transfer hook that does the same thing as the\nexisting cred_prepare hook. (Implemented by having hook_cred_prepare()\ncall hook_cred_transfer() so that the two functions are less likely to\naccidentally diverge in the future.)"
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "security/landlock/cred.c"
               ],
               "versions": [
                  {
                     "version": "385975dca53e",
                     "lessThan": "916c648323fa",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "385975dca53e",
                     "lessThan": "0d74fd54db0b",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "385975dca53e",
                     "lessThan": "16896914bace",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "385975dca53e",
                     "lessThan": "b14cc2cf313b",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "385975dca53e",
                     "lessThan": "39705a6c29f8",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "security/landlock/cred.c"
               ],
               "versions": [
                  {
                     "version": "5.13",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.13",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.165",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.103",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.44",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.10.3",
                     "lessThanOrEqual": "6.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.11",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/916c648323fa53b89eedb34a0988ddaf01406117"
            },
            {
               "url": "https://git.kernel.org/stable/c/0d74fd54db0bd0c0c224bef0da8fc95ea9c9f36c"
            },
            {
               "url": "https://git.kernel.org/stable/c/16896914bace82d7811c62f3b6d5320132384f49"
            },
            {
               "url": "https://git.kernel.org/stable/c/b14cc2cf313bd29056fadbc8ecd7f957cf5791ff"
            },
            {
               "url": "https://git.kernel.org/stable/c/39705a6c29f8a2b93cf5b99528a55366c50014d1"
            },
            {
               "url": "https://lore.kernel.org/all/20240817.shahka3Ee1iy@digikod.net/"
            },
            {
               "url": "https://www.openwall.com/lists/oss-security/2024/08/17/2"
            },
            {
               "url": "https://bugs.chromium.org/p/project-zero/issues/detail?id=2566"
            }
         ],
         "title": "landlock: Don't lose track of restrictions on cred_transfer",
         "x_generator": {
            "engine": "bippy-c9c4e1df01b2"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-42318",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}