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CVE-2023-3772

16
FAUCET Score

CVE-2023-3772 is a null pointer dereference vulnerability in the Linux kernel's XFRM subsystem, affecting Debian, Fedora, Linux, and Red Hat distributions. An attacker with CAP_NET_ADMIN privileges can trigger a kernel crash, leading to a denial of service. Rated as Medium severity (CVSS 4.4), this local attack requires high privileges and has no confidentiality or integrity impact. Currently, there is no public exploit code, active exploitation, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
8.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_for_real_time:8.0:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_for_real_time_for_nfv:8.0:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.45%
Probability of exploitation in next 30 days
EPSS Percentile
36.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0045 is in the 87th percentile among its peer group of 3,720 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (14)

microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 5.15.158.1-1
microsoftpatch availablevia msrc
Product: cbl2 hyperv-daemons 5.15.153.1-1 on CBL Mariner 2.0Fixed in: 5.15.158.1-1
microsoftpatch availablevia msrc
Product: cbl2 hyperv-daemons 5.15.158.1-1 on CBL Mariner 2.0Fixed in: 5.15.158.1-1
microsoftpatch availablevia msrc
Product: 19900-17086Fixed in: 5.15.158.1-1
microsoftpatch availablevia msrc
Product: 17427-17086Fixed in: 5.15.158.1-1
microsoftpatch availablevia msrc
Product: 17327-16823Fixed in: 5.15.158.1-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 5.15.158.1-1
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-rt-0:4.18.0-513.5.1.rt7.307.el8_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-0:4.18.0-513.5.1.el8_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: kernel-0:4.18.0-372.87.1.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: kernel-0:4.18.0-477.43.1.el8_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-0:5.14.0-362.8.1.el9_3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 8Fixed in: kernel-0:4.18.0-372.87.1.el8_6
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-rt

Vendor Advisories (3)

microsoft2024-Jan/CVE-2023-3772

CVE-2023-3772

Jan 9, 2024
redhatCVE-2023-3772Moderate

kernel: xfrm: NULL pointer dereference in xfrm_update_ae_params()

Jul 21, 2023
microsoft2023-Jul/CVE-2023-3772

Kernel: xfrm: null pointer dereference in xfrm_update_ae_params()

Jul 11, 2023

References

lists.debian.org / debian-lts-announce/2023/10/msg00027.html
lists.debian.org / debian-lts-announce/2024/01/msg00004.html
debian.org / security/2023/dsa-5492
openwall.com / lists/oss-security/2023/08/10/1
openwall.com / lists/oss-security/2023/08/10/3
access.redhat.com / errata/RHSA-2023:6583
Third Party Advisory
access.redhat.com / errata/RHSA-2023:6901
Third Party Advisory
access.redhat.com / errata/RHSA-2023:7077
Third Party Advisory
access.redhat.com / errata/RHSA-2024:0412
access.redhat.com / errata/RHSA-2024:0575
access.redhat.com / security/cve/CVE-2023-3772
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory