Home/CVE/A use-after-free read flaw was found in sock_getsockopt() in net/core/sock.c due to SO_PEERCRED and SO_PEERGROUPS race w
CVE

CVE-2021-4203

A use-after-free read flaw was found in sock_getsockopt() in net/core/sock.c due to SO_PEERCRED and SO_PEERGROUPS race w

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.

MEDIUM · CVSS 6.8 EPSS 0.00092
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-416Use After Free
▤

Affected Products & Versions

17
linux kernel< 5.15
linux kernelall versions
netapp active iq unified managerall versions
netapp e-series santricity os controller>= 11.0.0 and <= 11.70.2
netapp element softwareall versions
netapp hci management nodeall versions
netapp solidfireall versions
netapp bootstrap osall versions
⚠

Public Exploits & PoCs

1
pocbugs.chromium.org · detail?id=2230&can=7&q=modified-after%3Atoday-30&sort=-mo...bugs.chromium.org
▣

Scoring & Timeline

6.8
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD25 Mar 2022 · 07:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
⚑

Vendor Advisories

25
rhsaRHSA-2022:1988Low
rhsaRHSA-2022:5626Moderate
rhsaRHSA-2022:1975Moderate
suse-csafSUSE-SU-2023:1848-1
suse-csafSUSE-SU-2023:2232-1
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.redhat.com/show_bug.cgi?id=2036934Issue TrackingPatchThird Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=35306eb23814PatchVendor Advisory
https://lore.kernel.org/netdev/20210929225750.2548112-1-eric.dumazet%40gmail.com/T/
https://security.netapp.com/advisory/ntap-20221111-0003/Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.htmlPatchThird Party Advisory
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