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CVE-2023-6546

18
FAUCET Score

CVE-2023-6546 is a race condition vulnerability in the Linux kernel's GSM 0710 tty multiplexor, affecting various Fedora and Red Hat Enterprise Linux distributions. This flaw allows a local unprivileged user to escalate privileges due to a use-after-free condition when two threads concurrently execute the GSMIOC_SETCONF ioctl. Rated with a CVSS score of 7.0 (High), exploitation requires high attack complexity but can lead to full compromise of confidentiality, integrity, and availability. Currently, there is no known active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
6.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*
6.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:*
6.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:*
6.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.0HIGH

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.0
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.77%
Probability of exploitation in next 30 days
EPSS Percentile
51.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0077 is in the 87th percentile among its peer group of 1,525 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

No media coverage found for this CVE.

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 (47)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 17095-17086Fixed in: 5.15.148.1-1
microsoftpatch availablevia msrc
Product: cbl2 kernel 5.15.148.1-1 on CBL Mariner 2.0Fixed in: 5.15.148.1-1
microsoftpatch availablevia msrc
Product: cbl2 kernel 5.15.180.1-1 on CBL Mariner 2.0Fixed in: 5.15.148.1-1
microsoftpatch availablevia msrc
Product: 17452-16823Fixed in: 5.15.148.1-1
microsoftpatch availablevia msrc
Product: 19673-17086Fixed in: 5.15.148.1-1
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceFixed in: kernel-rt-0:4.18.0-305.134.1.rt7.210.el8_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceFixed in: kernel-0:4.18.0-305.134.1.el8_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsFixed in: kernel-0:4.18.0-305.134.1.el8_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsFixed in: kpatch-patch
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: kernel-0:4.18.0-372.93.1.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: kpatch-patch
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: kernel-0:4.18.0-477.55.1.el8_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: kpatch-patch
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
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: kpatch-patch
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: kernel-0:5.14.0-284.55.1.el9_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: kernel-rt-0:5.14.0-284.55.1.rt14.340.el9_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: kpatch-patch
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 8Fixed in: kernel-0:4.18.0-372.93.1.el8_6
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/cluster-logging-operator-bundle:v5.7.13-16
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/cluster-logging-rhel8-operator:v5.7.13-7
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/elasticsearch6-rhel8:v6.8.1-408
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/elasticsearch-operator-bundle:v5.7.13-19
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/elasticsearch-proxy-rhel8:v1.0.0-480
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/elasticsearch-rhel8-operator:v5.7.13-9
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/eventrouter-rhel8:v0.4.0-248
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/fluentd-rhel8:v1.14.6-215
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/kibana6-rhel8:v6.8.1-431
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/log-file-metric-exporter-rhel8:v1.1.0-228
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/logging-curator5-rhel8:v5.8.1-471
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/logging-loki-rhel8:v2.9.6-15
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/logging-view-plugin-rhel8:v5.7.13-3
View patch
redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/loki-rhel8-operator:v5.7.13-12
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/lokistack-gateway-rhel8:v0.1.0-527
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/opa-openshift-rhel8:v0.1.0-225
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/vector-rhel8:v0.28.1-57
View patch
redhatpatch availablevia redhat_api
Product: RHOL-5.7-RHEL-8Fixed in: openshift-logging/loki-operator-bundle:v5.7.13-27
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-rt-0:4.18.0-513.24.1.rt7.326.el8_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-0:4.18.0-513.24.1.el8_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kpatch-patch
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Advanced Update SupportFixed in: kernel-0:4.18.0-193.136.1.el8_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportFixed in: kernel-0:4.18.0-305.134.1.el8_4
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-rt

Vendor Advisories (2)

redhatCVE-2023-6546Important

kernel: GSM multiplexing race condition leads to privilege escalation

Dec 21, 2023
microsoft2023-Dec/CVE-2023-6546Important

Kernel: gsm multiplexing race condition leads to privilege escalation

Dec 12, 2023

References

openwall.com / lists/oss-security/2024/04/10/18
openwall.com / lists/oss-security/2024/04/10/21
openwall.com / lists/oss-security/2024/04/11/7
openwall.com / lists/oss-security/2024/04/11/9
openwall.com / lists/oss-security/2024/04/12/1
openwall.com / lists/oss-security/2024/04/12/2
openwall.com / lists/oss-security/2024/04/16/2
openwall.com / lists/oss-security/2024/04/17/1
access.redhat.com / errata/RHSA-2024:0930
access.redhat.com / errata/RHSA-2024:0937
access.redhat.com / errata/RHSA-2024:1018
access.redhat.com / errata/RHSA-2024:1019
access.redhat.com / errata/RHSA-2024:1055
access.redhat.com / errata/RHSA-2024:1250
access.redhat.com / errata/RHSA-2024:1253
access.redhat.com / errata/RHSA-2024:1306
access.redhat.com / errata/RHSA-2024:1607
access.redhat.com / errata/RHSA-2024:1612
access.redhat.com / errata/RHSA-2024:1614
access.redhat.com / errata/RHSA-2024:2093
access.redhat.com / errata/RHSA-2024:2394
access.redhat.com / errata/RHSA-2024:2621
access.redhat.com / errata/RHSA-2024:2697
access.redhat.com / errata/RHSA-2024:4577
access.redhat.com / errata/RHSA-2024:4729
access.redhat.com / errata/RHSA-2024:4731
access.redhat.com / errata/RHSA-2024:4970
access.redhat.com / security/cve/CVE-2023-6546
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
github.com / torvalds/linux/commit/3c4f8333b582487a2d1e02171f1465531cde53e3
Patch
zerodayinitiative.com / advisories/ZDI-CAN-20527