Description
A vulnerability was found in the Linux kernel's EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | kernel | Fixed in v5.7-rc1 | — |
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 | 5.7.6-1 | — |
| Debian 13 | linux | 5.7.6-1 | — |
| Debian 12 | linux | 5.7.6-1 | — |
| Debian 10 | linux | 4.19.260-1 | DLA-3131-1 |
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 | 5.4.0-128.144 | USN-5668-1 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1086.93 | USN-5668-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1094.100 | — |
| Ubuntu 20.04 LTS | linux-azure-fde | 5.4.0-1092.97+cvm1.1 | USN-5706-1 |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1047.52 | USN-5668-1 |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1090.98 | USN-5677-1 |
| Ubuntu 20.04 LTS | linux-gke | 5.4.0-1084.90 | USN-5668-1 |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1054.57 | USN-5668-1 |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1034.38 | USN-5668-1 |
| Ubuntu 20.04 LTS | linux-iot | 5.4.0-1005.7 | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1076.81 | USN-5668-1 |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1084.92 | USN-5668-1 |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1071.81 | USN-5677-1 |
| Ubuntu 20.04 LTS | linux-riscv +12 | No fix yet | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-201.212 | USN-5790-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1147.159 | USN-5790-1 |
| Ubuntu 18.04 LTS | linux-aws-5.4 | 5.4.0-1086.93~18.04.1 | USN-5682-1 |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1158.173 | USN-5790-1 |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1094.100~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-dell300x | 4.15.0-1058.63 | USN-5790-1 |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1142.158 | USN-5790-1 |
| Ubuntu 18.04 LTS | linux-gcp-5.4 | 5.4.0-1092.101~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-128.144~18.04.1 | USN-5668-1 |
| Ubuntu 18.04 LTS | linux-ibm-5.4 | 5.4.0-1034.38~18.04.1 | USN-5668-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1133.138 | USN-5790-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1112.123 | USN-5790-1 |
| Ubuntu 18.04 LTS | linux-oracle-5.4 | 5.4.0-1084.92~18.04.1 | USN-5677-1 |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1071.81~18.04.1 | USN-5677-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1125.133 | USN-5790-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1143.153 | USN-5790-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | 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 | 5.4.0-1086.93+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1094.100+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1062.70 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1092.101+fips1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2087.93 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2067.73 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1104.115 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-gcp-fips | 4.15.0-2052.57 | — |
| Ubuntu Pro 16.04 LTS | linux-aws-hwe | 4.15.0-1147.159~16.04.1 | USN-5790-1 |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1159.174~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-gcp | 4.15.0-1142.158~16.04.1 | USN-5790-1 |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-201.212~16.04.1 | USN-5790-1 |
| Ubuntu Pro 16.04 LTS | linux-oracle | 4.15.0-1112.123~16.04.1 | USN-5790-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1158.173~14.04.1 | USN-5790-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | kernel-azure +1 | 5.3.18-150300.38.40.4 | SUSE-SU-2022:0363-1 |
| SLES 15 SP3 | kernel-syms-azure | 5.3.18-150300.38.40.1 | SUSE-SU-2022:0363-1 |
| SLES 12 SP5 | kernel-syms +2 | 4.12.14-122.261.1 | SUSE-SU-2025:01983-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.261.1 | SUSE-SU-2025:01983-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_69 | 1-8.3.1 | SUSE-SU-2025:01983-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.3 | kernel-azure +1 | 5.3.18-150300.38.40.4 | openSUSE-SU-2022:0363-1 |
| openSUSE Leap 15.3 | kernel-syms-azure | 5.3.18-150300.38.40.1 | openSUSE-SU-2022:0363-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.294-220.533 | 1.0-0.amzn2 | ALAS2-2022-1852 |
| Amazon Linux 2 | perf +8 | 4.14.294-220.533.amzn2 | ALAS2-2022-1852 |
Advisories 11
- USN-5668-1 linux, linux-aws, linux-bluefield, linux-gke, linux-gkeop, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-kvm, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-5790-1 linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-dell300x, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-5677-1 linux-gcp, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-5682-1 linux-aws-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-5706-1 linux-azure-fde vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- DLA-3131-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2022:0363-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0363-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:01983-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2-2022-1852 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 26, 2025
- WID-SEC-2022-1207 Linux Kernel: Mehrere Schwachstellen ermöglichen Offenlegung von Informationen BSI CERT-Bund (WID) · Jul 31, 2025
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2036024
- https://access.redhat.com/security/cve/CVE-2021-4159
- https://security-tracker.debian.org/tracker/CVE-2021-4159
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=294f2fc6da27620a506e6c050241655459ccd6bd
- [debian-lts-announce] 20221002 [SECURITY] [DLA 3131-1] linux security update mailing-list