Is CVE-2026-23269 in the CISA KEV catalog?

No. CVE-2026-23269 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-23269?

CVE-2026-23269 has a CVSS v3 base score of 7.1 (Moderate).

What is the EPSS score for CVE-2026-23269?

CVE-2026-23269 has an EPSS score of 0.13% (3th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-23269?

Upgrade linux on debian 11 to 5.10.251-1 or later. Fixes are available for 121 affected products.

CVE & CISA-KEV Catalog

CVE-2026-23269

MEDIUM

7.1

CVSS v3

NVD

Description

In the Linux kernel, the following vulnerability has been resolved: apparmor: validate DFA start states are in bounds in unpack_pdb Start states are read from untrusted data and used as indexes into the DFA state tables. The aa_dfa_next() function call in unpack_pdb() will access dfa->tables[YYTD_ID_BASE][start], and if the start state exceeds the number of states in the DFA, this results in an out-of-bound read. ================================================================== BUG: KASAN: slab-out-of-bounds in aa_dfa_next+0x2a1/0x360 Read of size 4 at addr ffff88811956fb90 by task su/1097 ... Reject policies with out-of-bounds start states during unpacking to prevent the issue.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

linuxDebian

Fixed in:5.10.251-1CVE-2026-23269

Fixed in:6.1.164-1CVE-2026-23269

Fixed in:6.12.74-2CVE-2026-23269

Fixed in:6.19.6-2CVE-2026-23269

awsUbuntu

Fixed in:4.15.0-1159LSN-0119-1

Fixed in:5.4.0-1009LSN-0119-1

Fixed in:5.15.0-1000LSN-0119-1

Fixed in:6.8.0-1008LSN-0119-1

aws-5.15Ubuntu

Fixed in:5.15.0-1000LSN-0119-1

aws-6.8Ubuntu

Fixed in:6.8.0-1000LSN-0119-1

aws-hweUbuntu

Fixed in:4.15.0-1126LSN-0119-1

azureUbuntu

Fixed in:4.15.0-1114LSN-0119-1

Fixed in:5.15.0-1000LSN-0119-1

Fixed in:6.8.0-1007LSN-0119-1

azure-4.15Ubuntu

Fixed in:4.15.0-1168LSN-0119-1

azure-5.15Ubuntu

Fixed in:5.15.0-1069LSN-0119-1

gcpUbuntu

Fixed in:5.15.0-1000LSN-0119-1

Fixed in:6.8.0-1007LSN-0119-1

gcp-4.15Ubuntu

Fixed in:4.15.0-1154LSN-0119-1

gcp-5.15Ubuntu

Fixed in:5.15.0-1000LSN-0119-1

gcp-6.8Ubuntu

Fixed in:6.8.0-1000LSN-0119-1

generic-4.15Ubuntu

Fixed in:4.15.0-143LSN-0119-1

Fixed in:4.15.0-214LSN-0119-1

generic-5.15Ubuntu

Fixed in:5.15.0-0LSN-0119-1

generic-5.4Ubuntu

Fixed in:5.4.0-150LSN-0119-1

Fixed in:5.4.0-26LSN-0119-1

gkeUbuntu

Fixed in:5.15.0-1000LSN-0119-1

ibmUbuntu

Fixed in:5.15.0-1000LSN-0119-1

Fixed in:6.8.0-1005LSN-0119-1

ibm-5.15Ubuntu

Fixed in:5.15.0-1000LSN-0119-1

ibm-6.8Ubuntu

Fixed in:6.8.0-1000LSN-0119-1

linuxUbuntu

Fixed in:4.15.0-249.261USN-8266-1

Fixed in:5.15.0-71LSN-0119-1

Fixed in:6.8.0-1LSN-0119-1

Fixed in:6.17.0-1LSN-0119-1

linux-awsUbuntu

Fixed in:4.15.0-1191.204USN-8266-1

linux-aws-fipsUbuntu

Fixed in:4.15.0-2129.135USN-8266-1

linux-aws-hweUbuntu

Fixed in:4.15.0-1191.204~16.04.1USN-8266-1

linux-azureUbuntu

Fixed in:4.15.0-1200.215~16.04.1USN-8267-1

Fixed in:5.15.0-1109.118USN-8163-2

linux-azure-4.15Ubuntu

Fixed in:4.15.0-1200.215USN-8266-1

linux-azure-5.15Ubuntu

Fixed in:5.15.0-1110.119~20.04.1USN-8243-1

linux-azure-5.4Ubuntu

Fixed in:5.4.0-1161.167~18.04.1USN-8201-1

linux-azure-fipsUbuntu

Fixed in:4.15.0-2109.115USN-8267-1

Fixed in:5.15.0-1109.118+fips1USN-8163-1

Fixed in:6.8.0-1052.58+fips1USN-8165-1

linux-bluefieldUbuntu

Fixed in:5.4.0-1116.123USN-8224-1

linux-fipsUbuntu

Fixed in:4.15.0-1146.158USN-8266-1

linux-gcpUbuntu

Fixed in:4.15.0-1184.201~16.04.1USN-8266-1

linux-gcp-4.15Ubuntu

Fixed in:4.15.0-1184.201USN-8266-1

linux-gcp-fipsUbuntu

Fixed in:4.15.0-2092.98USN-8266-1

linux-hweUbuntu

Fixed in:4.15.0-249.261~16.04.1USN-8266-1

linux-image-4.15.0-1146-fipsUbuntu

Fixed in:4.15.0-1146.158USN-8266-1

linux-image-4.15.0-1153-oracleUbuntu

Fixed in:4.15.0-1153.164~16.04.1USN-8267-1

Fixed in:4.15.0-1153.164USN-8266-1

linux-image-4.15.0-1173-kvmUbuntu

Fixed in:4.15.0-1173.178USN-8266-1

linux-image-4.15.0-1184-gcpUbuntu

Fixed in:4.15.0-1184.201~16.04.1USN-8266-1

Fixed in:4.15.0-1184.201USN-8266-1

linux-image-4.15.0-1191-awsUbuntu

Fixed in:4.15.0-1191.204~16.04.1USN-8266-1

Fixed in:4.15.0-1191.204USN-8266-1

linux-image-4.15.0-1200-azureUbuntu

Fixed in:4.15.0-1200.215~16.04.1USN-8267-1

Fixed in:4.15.0-1200.215USN-8266-1

linux-image-4.15.0-2092-gcp-fipsUbuntu

Fixed in:4.15.0-2092.98USN-8266-1

linux-image-4.15.0-2109-azure-fipsUbuntu

Fixed in:4.15.0-2109.115USN-8267-1

linux-image-4.15.0-2129-aws-fipsUbuntu

Fixed in:4.15.0-2129.135USN-8266-1

linux-image-4.15.0-249-genericUbuntu

Fixed in:4.15.0-249.261~16.04.1USN-8266-1

Fixed in:4.15.0-249.261USN-8266-1

linux-image-4.15.0-249-lowlatencyUbuntu

Fixed in:4.15.0-249.261~16.04.1USN-8266-1

Fixed in:4.15.0-249.261USN-8266-1

linux-image-5.15.0-1096-intel-iot-realtimeUbuntu

Fixed in:5.15.0-1096.98USN-8164-1

linux-image-5.15.0-1097-raspiUbuntu

Fixed in:5.15.0-1097.100USN-8141-1

linux-image-5.15.0-1109-azureUbuntu

Fixed in:5.15.0-1109.118USN-8163-2

linux-image-5.15.0-1109-azure-fipsUbuntu

Fixed in:5.15.0-1109.118+fips1USN-8163-1

linux-image-5.15.0-1110-azureUbuntu

Fixed in:5.15.0-1110.119~20.04.1USN-8243-1

linux-image-5.4.0-1116-bluefieldUbuntu

Fixed in:5.4.0-1116.123USN-8224-1

linux-image-5.4.0-1139-raspiUbuntu

Fixed in:5.4.0-1139.152~18.04.1USN-8098-10

Fixed in:5.4.0-1139.152USN-8098-10

linux-image-5.4.0-1161-azureUbuntu

Fixed in:5.4.0-1161.167~18.04.1USN-8201-1

linux-image-6.17.0-1017-oemUbuntu

Fixed in:6.17.0-1017.17USN-8152-1

linux-image-6.8.0-1029-xilinxUbuntu

Fixed in:6.8.0-1029.30USN-8261-1

linux-image-6.8.0-1052-azure-fipsUbuntu

Fixed in:6.8.0-1052.58+fips1USN-8165-1

linux-image-aws-4.15Ubuntu

Fixed in:4.15.0.1191.189USN-8266-1

linux-image-aws-fipsUbuntu

Fixed in:4.15.0.2129.123USN-8266-1

linux-image-aws-fips-4.15Ubuntu

Fixed in:4.15.0.2129.123USN-8266-1

linux-image-aws-hweUbuntu

Fixed in:4.15.0.1191.204~16.04.1USN-8266-1

linux-image-aws-lts-18.04Ubuntu

Fixed in:4.15.0.1191.189USN-8266-1

linux-image-azureUbuntu

Fixed in:4.15.0.1200.215~16.04.1USN-8267-1

Fixed in:5.4.0.1161.167~18.04.1USN-8201-1

Fixed in:5.15.0.1110.119~20.04.1USN-8243-1

linux-image-azure-4.15Ubuntu

Fixed in:4.15.0.1200.168USN-8266-1

linux-image-azure-5.15Ubuntu

Fixed in:5.15.0.1110.119~20.04.1USN-8243-1

Fixed in:5.15.0.1109.107USN-8163-2

linux-image-azure-5.4Ubuntu

Fixed in:5.4.0.1161.167~18.04.1USN-8201-1

linux-image-azure-cvmUbuntu

Fixed in:5.15.0.1110.119~20.04.1USN-8243-1

linux-image-azure-fipsUbuntu

Fixed in:4.15.0.2109.105USN-8267-1

Fixed in:5.15.0.1109.94USN-8163-1

Fixed in:6.8.0-1052.58+fips1USN-8165-1

linux-image-azure-fips-4.15Ubuntu

Fixed in:4.15.0.2109.105USN-8267-1

linux-image-azure-fips-5.15Ubuntu

Fixed in:5.15.0.1109.94USN-8163-1

linux-image-azure-fips-6.8Ubuntu

Fixed in:6.8.0-1052.58+fips1USN-8165-1

linux-image-azure-lts-18.04Ubuntu

Fixed in:4.15.0.1200.168USN-8266-1

linux-image-azure-lts-22.04Ubuntu

Fixed in:5.15.0.1109.107USN-8163-2

linux-image-bluefieldUbuntu

Fixed in:5.4.0.1116.112USN-8224-1

linux-image-bluefield-5.4Ubuntu

Fixed in:5.4.0.1116.112USN-8224-1

linux-image-fipsUbuntu

Fixed in:4.15.0.1146.143USN-8266-1

linux-image-gcpUbuntu

Fixed in:4.15.0.1184.201~16.04.1USN-8266-1

linux-image-gcp-4.15Ubuntu

Fixed in:4.15.0.1184.197USN-8266-1

linux-image-gcp-fipsUbuntu

Fixed in:4.15.0.2092.90USN-8266-1

linux-image-gcp-fips-4.15Ubuntu

Fixed in:4.15.0.2092.90USN-8266-1

linux-image-gcp-lts-18.04Ubuntu

Fixed in:4.15.0.1184.197USN-8266-1

linux-image-genericUbuntu

Fixed in:4.15.0.249.233USN-8266-1

linux-image-generic-hwe-16.04Ubuntu

Fixed in:4.15.0.249.261~16.04.1USN-8266-1

linux-image-gkeUbuntu

Fixed in:4.15.0.1184.201~16.04.1USN-8266-1

linux-image-intel-iot-realtimeUbuntu

Fixed in:5.15.0.1096.100USN-8164-1

linux-image-intel-iot-realtime-5.15Ubuntu

Fixed in:5.15.0.1096.100USN-8164-1

linux-image-kvmUbuntu

Fixed in:4.15.0.1173.164USN-8266-1

linux-image-lowlatencyUbuntu

Fixed in:4.15.0.249.233USN-8266-1

linux-image-lowlatency-hwe-16.04Ubuntu

Fixed in:4.15.0.249.261~16.04.1USN-8266-1

linux-image-oemUbuntu

Fixed in:4.15.0.249.261~16.04.1USN-8266-1

linux-image-oem-24.04Ubuntu

Fixed in:6.17.0-1017.17USN-8152-1

linux-image-oem-24.04aUbuntu

Fixed in:6.17.0-1017.17USN-8152-1

linux-image-oem-24.04bUbuntu

Fixed in:6.17.0-1017.17USN-8152-1

linux-image-oem-24.04cUbuntu

Fixed in:6.17.0-1017.17USN-8152-1

linux-image-oem-24.04dUbuntu

Fixed in:6.17.0-1017.17USN-8152-1

linux-image-oem-6.17Ubuntu

Fixed in:6.17.0-1017.17USN-8152-1

linux-image-oracleUbuntu

Fixed in:4.15.0.1153.164~16.04.1USN-8267-1

linux-image-oracle-4.15Ubuntu

Fixed in:4.15.0.1153.158USN-8266-1

linux-image-oracle-lts-18.04Ubuntu

Fixed in:4.15.0.1153.158USN-8266-1

linux-image-raspiUbuntu

Fixed in:5.4.0.1139.170USN-8098-10

Fixed in:5.15.0.1097.95USN-8141-1

linux-image-raspi-5.15Ubuntu

Fixed in:5.15.0.1097.95USN-8141-1

linux-image-raspi-5.4Ubuntu

Fixed in:5.4.0.1139.152~18.04.1USN-8098-10

Fixed in:5.4.0.1139.170USN-8098-10

linux-image-raspi-hwe-18.04Ubuntu

Fixed in:5.4.0.1139.152~18.04.1USN-8098-10

linux-image-raspi-nolpaeUbuntu

Fixed in:5.15.0.1097.95USN-8141-1

linux-image-raspi2Ubuntu

Fixed in:5.4.0.1139.170USN-8098-10

linux-image-virtualUbuntu

Fixed in:4.15.0.249.233USN-8266-1

linux-image-virtual-hwe-16.04Ubuntu

Fixed in:4.15.0.249.261~16.04.1USN-8266-1

linux-image-xilinxUbuntu

Fixed in:6.8.0.1029.30USN-8261-1

linux-image-xilinx-6.8Ubuntu

Fixed in:6.8.0.1029.30USN-8261-1

linux-image-xilinx-zynqmpUbuntu

Fixed in:6.8.0.1029.30USN-8261-1

linux-intel-iot-realtimeUbuntu

Fixed in:5.15.0-1096.98USN-8164-1

linux-kvmUbuntu

Fixed in:4.15.0-1173.178USN-8266-1

linux-oem-6.17Ubuntu

Fixed in:6.17.0-1017.17USN-8152-1

linux-oracleUbuntu

Fixed in:4.15.0-1153.164~16.04.1USN-8267-1

Fixed in:4.15.0-1153.164USN-8266-1

linux-raspiUbuntu

Fixed in:5.4.0-1139.152USN-8098-10

Fixed in:5.15.0-1097.100USN-8141-1

linux-raspi-5.4Ubuntu

Fixed in:5.4.0-1139.152~18.04.1USN-8098-10

linux-xilinxUbuntu

Fixed in:6.8.0-1029.30USN-8261-1

lowlatency-4.15Ubuntu

Fixed in:4.15.0-143LSN-0119-1

Fixed in:4.15.0-214LSN-0119-1

lowlatency-5.15Ubuntu

Fixed in:5.15.0-0LSN-0119-1

lowlatency-5.4Ubuntu

Fixed in:5.4.0-150LSN-0119-1

Fixed in:5.4.0-26LSN-0119-1

oracleUbuntu

Fixed in:4.15.0-1129LSN-0119-1

Fixed in:5.15.0-1055LSN-0119-1

Fixed in:6.8.0-1005LSN-0119-1

oracle-5.15Ubuntu

Fixed in:5.15.0-1055LSN-0119-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.13%probability of exploitation in 30 days

3rdpercentile

Low risk: more likely to be exploited than 3% of all known CVEs.

References

Patch8

Third-Party Advisory1

qualys.com

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-29.