Description
In binder_release_work of binder.c, there is a possible use-after-free due to improper locking. This could lead to local escalation of privilege in the kernel with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-161151868References: N/A
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Android | Android kernel | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 5.9.6-1 | — |
| Debian 13 | linux | 5.9.6-1 | — |
| Debian 12 | linux | 5.9.6-1 | — |
| Debian 9 | linux-4.19 | 4.19.160-2~deb9u1 | DLA-2483-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-realtime +1 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-56.62 | USN-4658-1 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1030.31 | USN-4658-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1032.33 | USN-4658-1 |
| Ubuntu 20.04 LTS | linux-gcp +1 | 5.4.0-1030.32 | USN-4658-1 |
| Ubuntu 20.04 LTS | linux-hwe-5.8 | 5.8.0-31.33~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1028.29 | USN-4658-1 |
| Ubuntu 20.04 LTS | linux-oem-5.6 | 5.6.0-1053.57 | USN-4912-1 |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1023.26 | USN-4658-1 |
| Ubuntu 20.04 LTS | linux-raspi2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-riscv | 5.4.0-37.42 | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-129.132 | USN-4680-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1091.96 | USN-4680-1 |
| Ubuntu 18.04 LTS | linux-aws-5.4 | 5.4.0-1030.31~18.04.1 | USN-4658-1 |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1103.114 | USN-4680-1 |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1032.33~18.04.1 | USN-4658-1 |
| Ubuntu 18.04 LTS | linux-dell300x | 4.15.0-1010.14 | — |
| Ubuntu 18.04 LTS | linux-gcp +12 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1091.104 | USN-4680-1 |
| Ubuntu 18.04 LTS | linux-gcp-5.4 +2 | 5.4.0-1030.32~18.04.1 | USN-4658-1 |
| Ubuntu 18.04 LTS | linux-gkeop-5.4 | 5.4.0-1005.6 | — |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-56.62~18.04.1 | USN-4658-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1082.84 | USN-4680-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1062.68 | USN-4680-1 |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1023.26~18.04.1 | USN-4658-1 |
| Ubuntu 18.04 LTS | linux-raspi2 +1 | 4.15.0-1077.82 | USN-4680-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1094.103 | USN-4680-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1091.96~16.04.1 | USN-4680-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1103.114~16.04.1 | USN-4680-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1091.104~16.04.1 | USN-4680-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-129.132~16.04.1 | USN-4680-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1062.68~16.04.1 | USN-4680-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 20.04 LTS | linux-aws-fips +2 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1069.73+fips2 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1073.76+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1067.71~20.04.1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2034.35 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2016.18 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1049.56 | — |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1103.114~14.04.1 | USN-4680-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.203-156.332 | 1.0-0.amzn2 | ALAS2-2020-1556 |
| Amazon Linux 2 | perf +8 | 4.14.203-156.332.amzn2 | ALAS2-2020-1556 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 2 repositories
-
sparrow-labz/CVE-2020-0423 ★ 6 · Mar 19, 2024
Researching CVE published originally by longterm.io
-
wired0ut/CVE-2020-0423 ★ 0 · May 10, 2026
An exploit to CVE-2020-0423, which is a Binder deffered work UAF.
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 5
- USN-4912-1 linux-oem-5.6 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4680-1 linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-gke-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4658-1 linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- DLA-2483-1 linux-4.19 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ALAS2-2020-1556 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Nov 11, 2020