CVE-2021-4203

2022-03-2500:00:00

CWE-362

redhat

www.cve.org

cve-2021-4203

net/core/sock.c

so_peercred

so_peergroups

listen()

connect()

user privileges

system crash

kernel information

AI Score

7.1

Confidence

High

EPSS

0.002

Percentile

53.0%

JSON

A use-after-free read flaw was found in sock_getsockopt() in net/core/sock.c due to SO_PEERCRED and SO_PEERGROUPS race with listen() (and connect()) in the Linux kernel. In this flaw, an attacker with a user privileges may crash the system or leak internal kernel information.

CNA Affected

[
  {
    "vendor": "n/a",
    "product": "kernel",
    "versions": [
      {
        "version": "kernel 5.15 rc4",
        "status": "affected"
      }
    ]
  }
]

References

bugs.chromium.org/p/project-zero/issues/detail?id=2230&can=7&q=modified-after%3Atoday-30&sort=-modified&colspec=ID%20Type%20Status%20Priority%20Milestone%20Owner%20Summary%20Modified%20Cve&cells=tiles&redir=1

bugzilla.redhat.com/show_bug.cgi?id=2036934

git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=35306eb23814

lore.kernel.org/netdev/20210929225750.2548112-1-eric.dumazet%40gmail.com/T/

security.netapp.com/advisory/ntap-20221111-0003/

www.oracle.com/security-alerts/cpujul2022.html