CVE-2023-21400: debian debian_linux Improper Locking

Modified

AliasesUBUNTU-CVE-2023-21400DEBIAN-CVE-2023-21400

Published 12-07-2023Last modified 13-02-2025

Vulnerability summary

CVE-2023-21400 is a medium (CVSS 6.7) Improper Locking vulnerability in debian debian_linux. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 17.6% of scored vulnerabilities. 1 public exploit is recorded.

Priority

Routine

Not severe (CVSS 6.7, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

6.7/10

010

Medium · v3.1 (NVD)

EPSS score

0.26%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 24 · Related 21

Timeline

12-07-2023
PublishedVulnerability first disclosed.
13-02-2025
Last modifiedVulnerability information updated.

Description

In multiple functions of io_uring.c, there is a possible kernel memory corruption due to improper locking. This could lead to local escalation of privilege in the kernel with System execution privileges needed. User interaction is not needed for exploitation.

CVSS metrics

3 scores · 3 sources · 1 version

v3.16.7

EPSS trend

Probability

0.26%

Chance of exploitation in the next 30 days

Percentile

18%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.26% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found

referenceUnverified
Exploit Reference (openwall.com)
Maturity: unknown

Weaknesses

CWE · root cause

CWE-667Improper LockingThe product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

Affected systems

Version check

Known conditions: local access, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu108 products

linux< 5.4.0-205.225 | < 5.15.0-82.91
linux-allwinner-5.19All versions (No fix recorded)
linux-aws< 5.4.0-1139.149 | < 5.15.0-1043.48
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< 5.15.0-1043.48~20.04.1
linux-aws-5.19All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1139.149~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-6.2All versions (No fix recorded)
linux-aws-6.5All versions (No fix recorded)
linux-aws-fips< 5.4.0-1139.149+fips1 | All versions (No fix recorded)
linux-azureAll versions (No fix recorded) | < 5.4.0-1143.150 | < 5.15.0-1045.52
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1045.52~20.04.1
linux-azure-5.19All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1143.150~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-6.2All versions (No fix recorded)
linux-azure-6.5All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fdeAll versions (No fix recorded) | < 5.15.0-1045.52.1
linux-azure-fde-5.19All versions (No fix recorded)
linux-azure-fde-6.2All versions (No fix recorded)
linux-azure-fips< 5.4.0-1143.150+fips1 | All versions (No fix recorded)
linux-bluefield< 5.4.0-1098.105 | < 5.15.0-1022.24
linux-fips< 5.4.0-1112.122 | All versions (No fix recorded)
linux-gcpAll versions (No fix recorded) | < 5.4.0-1142.151 | < 5.15.0-1040.48
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1040.48~20.04.1
linux-gcp-5.19All versions (No fix recorded)
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1142.151~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-6.2All versions (No fix recorded)
linux-gcp-6.5All versions (No fix recorded)
linux-gcp-fips< 5.4.0-1142.151+fips1 | All versions (No fix recorded)
linux-gkeAll versions (No fix recorded) | < 5.15.0-1040.45
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15All versions (No fix recorded)
linux-gke-5.4All versions (No fix recorded)
linux-gkeopAll versions (No fix recorded) | < 5.15.0-1026.31
linux-gkeop-5.15< 5.15.0-1026.31~20.04.1
linux-gkeop-5.4All versions (No fix recorded)
linux-hweAll versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.15< 5.15.0-82.91~20.04.1
linux-hwe-5.19All versions (No fix recorded)
linux-hwe-5.4< 5.4.0-205.225~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1085.90 | < 5.15.0-1036.39
linux-ibm-5.15< 5.15.0-1036.39~20.04.1
linux-ibm-5.4< 5.4.0-1085.90~18.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtime< 5.15.0-1037.39
linux-intel-iotg< 5.15.0-1038.43
linux-intel-iotg-5.15< 5.15.0-1038.43~20.04.1
linux-iot< 5.4.0-1048.51
linux-kvm< 5.4.0-1126.134 | < 5.15.0-1040.45
linux-lowlatency< 5.15.0-82.91
linux-lowlatency-hwe-5.15< 5.15.0-82.91~20.04.1
linux-lowlatency-hwe-5.19All versions (No fix recorded)
linux-lowlatency-hwe-6.2All versions (No fix recorded)
linux-lowlatency-hwe-6.5All versions (No fix recorded)
linux-nvidia< 5.15.0-1031.31
linux-nvidia-tegra< 5.15.0-1017.17
linux-nvidia-tegra-5.15< 5.15.0-1017.17~20.04.1
linux-nvidia-tegra-igx< 5.15.0-1004.4
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-5.17All versions (No fix recorded)
linux-oem-5.6All versions (No fix recorded)
linux-oem-6.0All versions (No fix recorded)
linux-oem-6.1All versions (No fix recorded)
linux-oem-6.5All versions (No fix recorded)
linux-oracle< 5.4.0-1137.146 | < 5.15.0-1041.47
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< 5.15.0-1041.47~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1137.146~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-oracle-6.5All versions (No fix recorded)
linux-raspi< 5.4.0-1122.134 | < 5.15.0-1036.39
linux-raspi-5.4< 5.4.0-1122.134~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1044.49
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1039.43~20.04.2
linux-riscv-5.19All versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-riscv-6.5All versions (No fix recorded)
linux-starfive-5.19All versions (No fix recorded)
linux-starfive-6.2All versions (No fix recorded)
linux-starfive-6.5All versions (No fix recorded)
linux-xilinx-zynqmp< 5.4.0-1058.62 | < 5.15.0-1025.29

Show all 108

Debian2 products

linux< 5.18.2-1
debian_linuxEOL10.0 | 11.0

Google1 product

androidAndroid kernel | na

3 vendors · 111 products

References

28 links

source.android.com/security/bulletin/pixel/2023-07-01REPORTVendor Advisory
www.openwall.com/lists/oss-security/2023/07/14/2Mailing ListThird Party Advisory
www.openwall.com/lists/oss-security/2023/07/19/2ExploitMailing ListThird Party Advisory
www.openwall.com/lists/oss-security/2023/07/19/7Mailing ListThird Party Advisory
www.openwall.com/lists/oss-security/2023/07/25/7Mailing List
www.debian.org/security/2023/dsa-5480Third Party Advisory
packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.htmlThird Party AdvisoryVDB Entry
lists.debian.org/debian-lts-announce/2023/10/msg00027.htmlMailing ListThird Party Advisory
security.netapp.com/advisory/ntap-20240119-0012/
ubuntu.com/security/CVE-2023-21400REPORT

Show all 28 references

yanglingxi1993.github.io/dirty_pagetable/dirty_pagetable.htmlREPORT
www.openwall.com/lists/oss-security/2023/07/14/2REPORT
www.openwall.com/lists/oss-security/2023/07/25/9REPORT
twitter.com/VAR10CK/status/1683303642173153280REPORT
ubuntu.com/security/notices/USN-6315-1Advisory
ubuntu.com/security/notices/USN-6325-1Advisory
ubuntu.com/security/notices/USN-6330-1Advisory
ubuntu.com/security/notices/USN-6332-1Advisory
ubuntu.com/security/notices/USN-6348-1Advisory
www.cve.org/CVERecord?id=CVE-2023-21400REPORT
ubuntu.com/security/notices/USN-7234-1Advisory
ubuntu.com/security/notices/USN-7234-2Advisory
ubuntu.com/security/notices/USN-7234-3Advisory
ubuntu.com/security/notices/USN-7234-4Advisory
ubuntu.com/security/notices/USN-7295-1Advisory
ubuntu.com/security/notices/USN-7234-5Advisory
ubuntu.com/security/notices/USN-7413-1Advisory
security-tracker.debian.org/tracker/CVE-2023-21400Advisory