CVE-2023-23455: debian debian_linux Type Confusion

CVSS: 5.5v3.1MediumModified

AliasesUBUNTU-CVE-2023-23455DEBIAN-CVE-2023-23455

Published 12-01-2023Last modified 14-10-2026

Vulnerability summary

CVE-2023-23455 is a medium (CVSS 5.5) Type Confusion vulnerability in debian debian_linux. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18.4% of scored vulnerabilities.

Overall risk

22/100

0100

Low · default modelHow is this calculated?

CVSS score

5.5/10

010

Medium · v3.1 (CVE.org)

EPSS score

0.27%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedIn no KEV catalog

RansomwareNone recordedNo known use recorded

Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 67 · Related 58

DLA-3349-1 DLA-3403-1 DSA-5324-1 MGASA-2023-0007 MGASA-2023-0008 RHSA-2023:6901+61 more

Timeline

12-01-2023
PublishedVulnerability first disclosed.
14-10-2026
Last modifiedVulnerability information updated.

Description

atm_tc_enqueue in net/sched/sch_atm.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service because of type confusion (non-negative numbers can sometimes indicate a TC_ACT_SHOT condition rather than valid classification results).

CVSS metrics

4 scores · 4 sources · 1 version

v3.15.5

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

18%

Versus all other CVEs

30-day change

0.00 pp

From 0.27% on 21-09-2026

21-09-202621-10-2026

EPSS score

0.27%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

Affected systems

Ubuntu91 products

linuxAll versions (No fix recorded) | < 4.4.0-239.273 | < 4.15.0-208.220 | < 5.4.0-144.161 | < 5.15.0-69.76
linux-aws< 4.4.0-1117.123 | < 4.4.0-1155.170 | < 4.15.0-1153.166 | < 5.4.0-1097.105 | < 5.15.0-1033.37
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11All versions (No fix recorded)
linux-aws-5.13All versions (No fix recorded)

linux-aws-5.15< 5.15.0-1033.37~20.04.1
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1097.105~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-fips< 4.15.0-2092.98 | All versions (No fix recorded) | < 5.4.0-1099.107+fips1
linux-aws-hwe< 4.15.0-1153.166~16.04.1
linux-azure< 4.15.0-1162.177~14.04.1 | < 4.15.0-1162.177~16.04.1 | All versions (No fix recorded) | < 5.4.0-1104.110 | < 5.15.0-1035.42
linux-azure-4.15< 4.15.0-1162.177
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1035.42~20.04.1
linux-azure-5.19< 5.19.0-1026.29~22.04.1
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1104.110~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fde< 5.15.0-1035.42.1
linux-azure-fips< 4.15.0-2071.77 | All versions (No fix recorded) | < 5.4.0-1104.110+fips1
linux-bluefield< 5.4.0-1059.65 | < 5.15.0-1015.17
linux-dell300x< 4.15.0-1062.67
linux-fips< 4.4.0-1088.95 | All versions (No fix recorded) | < 4.15.0-1108.119 | < 5.4.0-1073.82
linux-gcp< 4.15.0-1147.163~16.04.1 | All versions (No fix recorded) | < 5.4.0-1101.110 | < 5.15.0-1031.38
linux-gcp-4.15< 4.15.0-1147.163
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1031.38~20.04.1
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1101.110~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-fips< 4.15.0-2055.60 | All versions (No fix recorded) | < 5.4.0-1101.110+fips1
linux-gke< 5.4.0-1095.102 | < 5.15.0-1030.35
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15< 5.15.0-1029.34~20.04.1
linux-gke-5.4All versions (No fix recorded)
linux-gkeop< 5.4.0-1065.69 | < 5.15.0-1017.22
linux-gkeop-5.15< 5.15.0-1017.22~20.04.1
linux-gkeop-5.4All versions (No fix recorded)
linux-hwe< 4.15.0-208.219~16.04.1 | All versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.15< 5.15.0-69.76~20.04.1
linux-hwe-5.19< 5.19.0-42.43~22.04.1
linux-hwe-5.4< 5.4.0-144.161~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1045.50 | < 5.15.0-1027.30
linux-ibm-5.4< 5.4.0-1045.50~18.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtime< 5.15.0-1023.28
linux-intel-iotg< 5.15.0-1027.32
linux-intel-iotg-5.15< 5.15.0-1027.32~20.04.1
linux-iot< 5.4.0-1013.15
linux-kvm< 4.4.0-1118.128 | < 4.15.0-1137.142 | < 5.4.0-1087.93 | < 5.15.0-1030.35
linux-lowlatency< 5.15.0-69.76
linux-lowlatency-hwe-5.15< 5.15.0-69.76~20.04.1
linux-lowlatency-hwe-5.19< 5.19.0-1024.25~22.04.1
linux-lts-xenial< 4.4.0-239.273~14.04.1
linux-nvidia< 5.15.0-1023.23
linux-nvidia-tegra-5.15< 5.15.0-1014.14~20.04.1
linux-oemAll versions (No fix recorded)
linux-oem-5.10All versions (No fix recorded)
linux-oem-5.13All versions (No fix recorded)
linux-oem-5.14All versions (No fix recorded)
linux-oem-5.17< 5.17.0-1031.32
linux-oem-5.6All versions (No fix recorded)
linux-oem-6.0< 6.0.0-1015.15
linux-oem-6.1< 6.1.0-1007.7
linux-oracle< 4.15.0-1116.127~16.04.1 | < 4.15.0-1116.127 | < 5.4.0-1094.103 | < 5.15.0-1032.38
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11All versions (No fix recorded)
linux-oracle-5.13All versions (No fix recorded)
linux-oracle-5.15< 5.15.0-1032.38~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1094.103~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1081.92 | < 5.15.0-1026.28
linux-raspi-5.4< 5.4.0-1081.92~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2< 4.15.0-1129.137 | All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1034.37
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1030.34~20.04.1
linux-riscv-5.8All versions (No fix recorded)
linux-snapdragon< 4.15.0-1148.158
linux-xilinx-zynqmp< 5.4.0-1022.26

Show all 91

Debian2 products

linux< 6.1.7-1
debian_linuxEOL11.0

Linux1 product

linux_kernel≥ 2.6.12, ≤ 6.1.4

3 vendors · 94 products

References

39 links

www.openwall.com/lists/oss-security/2023/01/10/1REPORTMailing ListThird Party Advisory
www.openwall.com/lists/oss-security/2023/01/10/4REPORTMailing ListThird Party Advisory
git.kernel.org/pub/…REPORTPatchVendor Advisory
www.debian.org/security/2023/dsa-5324Vendor AdvisoryThird Party Advisory
lists.debian.org/debian-lts-announce/2023/03/msg00000.htmlMailing List
lists.debian.org/debian-lts-announce/2023/05/msg00006.htmlMailing List
ubuntu.com/security/CVE-2023-23455REPORT
git.kernel.org/linus/a2965c7be0522eaa18808684b7b82b248515511bREPORT
ubuntu.com/security/notices/USN-5915-1Advisory
ubuntu.com/security/notices/USN-5917-1Advisory

Show all 39 references

ubuntu.com/security/notices/USN-5924-1Advisory
ubuntu.com/security/notices/USN-5927-1Advisory
ubuntu.com/security/notices/USN-5934-1Advisory
ubuntu.com/security/notices/USN-5939-1Advisory
ubuntu.com/security/notices/USN-5940-1Advisory
ubuntu.com/security/notices/USN-5951-1Advisory
ubuntu.com/security/notices/USN-5975-1Advisory
ubuntu.com/security/notices/USN-5981-1Advisory
ubuntu.com/security/notices/USN-5982-1Advisory
ubuntu.com/security/notices/USN-5984-1Advisory
ubuntu.com/security/notices/USN-5987-1Advisory
ubuntu.com/security/notices/USN-5991-1Advisory
ubuntu.com/security/notices/USN-6000-1Advisory
ubuntu.com/security/notices/USN-6001-1Advisory
ubuntu.com/security/notices/USN-6004-1Advisory
ubuntu.com/security/notices/USN-6009-1Advisory
ubuntu.com/security/notices/USN-6013-1Advisory
ubuntu.com/security/notices/USN-6014-1Advisory
ubuntu.com/security/notices/USN-6030-1Advisory
ubuntu.com/security/notices/USN-6071-1Advisory
ubuntu.com/security/notices/USN-6072-1Advisory
ubuntu.com/security/notices/USN-6079-1Advisory
ubuntu.com/security/notices/USN-6091-1Advisory
ubuntu.com/security/notices/USN-6096-1Advisory
www.cve.org/CVERecord?id=CVE-2023-23455REPORT
security-tracker.debian.org/tracker/CVE-2023-23455Advisory
nvd.nist.gov/vuln/detail/CVE-2023-23455OvalAdvisory
cert-portal.siemens.com/productcert/html/ssa-794697.html
cert-portal.siemens.com/productcert/html/ssa-769027.html

Vulnerability summary

Advisory lineage

Timeline

Description

CVSS metrics

EPSS trend

Known exploited

Public exploits

Weaknesses

Affected systems

References

Related vulnerabilities