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CVE-2023-6932

22
FAUCET Score

CVE-2023-6932 is a use-after-free vulnerability in the Linux kernel's IPv4 IGMP component, affecting Debian and other Linux distributions. It allows for local privilege escalation due to a race condition that incorrectly registers a timer on a freed object. Rated 7.0 HIGH, exploitation requires local access and has high impact on confidentiality, integrity, and availability, though with high attack complexity. There is currently no public exploit code, active exploitation, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.6.12, < 6.7CPE match
cpe:2.3:a:linux:kernel:*:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
< 4.14.332CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.15, < 4.19.301CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.20, < 5.4.263CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.37%
Probability of exploitation in next 30 days
EPSS Percentile
29.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0037 is in the 68th percentile among its peer group of 1,525 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.4 InfoSec Media, 0.1 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (22)

microsoftpatch availablevia msrc
Product: 19529-17084Fixed in: 6.6.29.1-4
microsoftpatch availablevia msrc
Product: cbl2 kernel 5.15.143.1-1 on CBL Mariner 2.0Fixed in: 5.15.143.1-1
microsoftpatch availablevia msrc
Product: azl3 kernel 6.6.29.1-4 on Azure Linux 3.0Fixed in: -
microsoftpatch availablevia msrc
Product: azl3 kernel 6.6.92.2-1 on Azure Linux 3.0Fixed in: 6.6.29.1-4
microsoftpatch availablevia msrc
Product: 17062-17084Fixed in: -
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 5.15.143.1-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 5.15.143.1-1
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 x64Fixed in: 6.6.29.1-4
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 ARMFixed in: 6.6.29.1-4
microsoftpatch availablevia msrc
Product: 18220-16823Fixed in: 5.15.143.1-1
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 8Fixed in: kernel-0:4.18.0-372.91.1.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: kernel-0:5.14.0-284.52.1.el9_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: kernel-rt-0:5.14.0-284.52.1.rt14.337.el9_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-rt-0:4.18.0-553.rt7.342.el8_10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-0:4.18.0-553.el8_10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: kernel-0:4.18.0-372.91.1.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: kernel-0:4.18.0-477.51.1.el8_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-0:5.14.0-427.13.1.el9_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: kernel-0:5.14.0-70.93.2.el9_0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: kernel-rt-0:5.14.0-70.93.1.rt21.165.el9_0
View patch
oraclevendor investigatingvia oracle_oval
Product: cpe:/a:oracle:linux:6:10:UEKR4_ELS
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-rt

Vendor Advisories (4)

microsoft2024-Jun/CVE-2023-6932

CVE-2023-6932

Jun 11, 2024
redhatCVE-2023-6932Moderate

kernel: use-after-free in IPv4 IGMP

Dec 19, 2023
microsoft2023-Dec/CVE-2023-6932Important

Use-after-free in Linux kernel's ipv4: igmp component

Dec 12, 2023
oracleoval:com.oracle.ovmsa:def:20240006IMPORTANT

OVMSA-2024-0006: Unbreakable Enterprise kernel security update (IMPORTANT)

References

cert-portal.siemens.com / productcert/html/ssa-265688.html
cert-portal.siemens.com / productcert/html/ssa-398330.html
cert-portal.siemens.com / productcert/html/ssa-613116.html
cert-portal.siemens.com / productcert/html/ssa-794697.html
packetstormsecurity.com / files/177029/Kernel-Live-Patch-Security-Notice-LSN-0100-1.html
Third Party Advisory
git.kernel.org / pub/scm/linux/kernel/git/torvalds/linux.git/commit
Mailing ListPatch
kernel.dance / e2b706c691905fe78468c361aaabc719d0a496f1
Patch
lists.debian.org / debian-lts-announce/2024/01/msg00004.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2024/01/msg00005.html
Mailing ListThird Party Advisory