{
  "cveId": "CVE-2021-47249",
  "url": "https://patchblox.com/security/cve/CVE-2021-47249",
  "summary": "CVE-2021-47249 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47249, released May 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  net: rds: fix memory leak in rds_recvmsg  Syzbot...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net: rds: fix memory leak in rds_recvmsg  Syzbot reported memory leak in rds. The problem was in unputted refcount in case of error.  int rds_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, \t\tint msg_flags) { ...  \tif (!rds_next_incoming(rs, \u0026inc)) { \t\t... \t}  After this \u0022if\u0022 inc refcount incremented and  \tif (rds_cmsg_recv(inc, msg, rs)) { \t\tret = -EFAULT; \t\tgoto out; \t} ... out: \treturn ret; }  in case of rds_cmsg_recv() fail the refcount won\u0027t be decremented. And it\u0027s easy to see from ftrace log, that rds_inc_addref() don\u0027t have rds_inc_put() pair in rds_recvmsg() after rds_cmsg_recv()   1)               |  rds_recvmsg() {  1)   3.721 us    |    rds_inc_addref();  1)   3.853 us    |    rds_message_inc_copy_to_user();  1) \u002B 10.395 us   |    rds_cmsg_recv();  1) \u002B 34.260 us   |  }",
  "published": "2024-05-21T15:15:13Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00236,
  "epssPercentile": 0.14706,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.10.46-1",
      "fix": "DEBIAN-CVE-2021-47249",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47249",
      "released": "2024-05-21T15:15:13Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.10.46-1",
      "fix": "DEBIAN-CVE-2021-47249",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47249",
      "released": "2024-05-21T15:15:13Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.10.46-1",
      "fix": "DEBIAN-CVE-2021-47249",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47249",
      "released": "2024-05-21T15:15:13Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}