Description
In the Linux kernel, the following vulnerability has been resolved:
netfilter: use get_random_u32 instead of prandom
bh might occur while updating per-cpu rnd_state from user context,
ie. local_out path.
BUG: using smp_processor_id() in preemptible [00000000] code: nginx/2725
caller is nft_ng_random_eval+0x24/0x54 [nft_numgen]
Call Trace:
check_preemption_disabled+0xde/0xe0
nft_ng_random_eval+0x24/0x54 [nft_numgen]
Use the random driver instead, this also avoids need for local prandom
state. Moreover, prandom now uses the random driver since d4150779e60f
("random32: use real rng for non-deterministic randomness").
Based on earlier patch from Pablo Neira.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 4.18 | 5.10.127 |
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 | 5.18.14-1 | — |
| Debian 13 | linux | 5.18.14-1 | — |
| Debian 12 | linux | 5.18.14-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-48.54 | — |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1020.24 | — |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1020.25 | — |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1024.30.1 | — |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1018.24 | — |
| Ubuntu 22.04 LTS | linux-gke | 5.15.0-1016.19 | — |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1003.5 | — |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1015.17 | — |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1016.21 | — |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1018.22 | — |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1007.7 | — |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1018.23 | — |
| Ubuntu 22.04 LTS | linux-riscv +32 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1020.24~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1020.25~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1018.24~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-48.54~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1016.21~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1018.23~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1019.22~20.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1021.21 | — |
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1154.164+fips1 | USN-7990-2 |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1158.165+fips1 | USN-7990-5 |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1128.138 | USN-7990-2 |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1157.166+fips1 | USN-7990-2 |
| Ubuntu Pro 20.04 LTS | linux | 5.4.0-225.245 | USN-7990-1 |
| Ubuntu Pro 20.04 LTS | linux-aws | 5.4.0-1154.164 | USN-7990-1 |
| Ubuntu Pro 20.04 LTS | linux-azure | 5.4.0-1157.164 | USN-7990-5 |
| Ubuntu Pro 20.04 LTS | linux-bluefield | 5.4.0-1116.123 | USN-8224-1 |
| Ubuntu Pro 20.04 LTS | linux-gcp | 5.4.0-1157.166 | USN-7990-1 |
| Ubuntu Pro 20.04 LTS | linux-ibm | 5.4.0-1100.105 | USN-7990-1 |
| Ubuntu Pro 20.04 LTS | linux-iot | 5.4.0-1058.61 | USN-7990-1 |
| Ubuntu Pro 20.04 LTS | linux-kvm | 5.4.0-1141.150 | USN-7990-1 |
| Ubuntu Pro 20.04 LTS | linux-oracle | 5.4.0-1152.162 | USN-7990-4 |
| Ubuntu Pro 20.04 LTS | linux-raspi | 5.4.0-1137.150 | USN-7990-6 |
| Ubuntu Pro 20.04 LTS | linux-xilinx-zynqmp | 5.4.0-1072.76 | USN-7990-3 |
| Ubuntu Pro 18.04 LTS | linux-aws-5.4 | 5.4.0-1154.164~18.04.1 | USN-7990-1 |
| Ubuntu Pro 18.04 LTS | linux-azure-5.4 | 5.4.0-1157.164~18.04.1 | USN-7990-5 |
| Ubuntu Pro 18.04 LTS | linux-gcp-5.4 | 5.4.0-1157.166~18.04.1 | USN-7990-1 |
| Ubuntu Pro 18.04 LTS | linux-hwe-5.4 | 5.4.0-225.245~18.04.1 | USN-7990-1 |
| Ubuntu Pro 18.04 LTS | linux-ibm-5.4 | 5.4.0-1100.105~18.04.1 | USN-7990-1 |
| Ubuntu Pro 18.04 LTS | linux-oracle-5.4 | 5.4.0-1152.162~18.04.1 | USN-7990-4 |
| Ubuntu Pro 18.04 LTS | linux-raspi-5.4 | 5.4.0-1137.150~18.04.1 | USN-7990-6 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | perf +29 | 5.14.0-162.6.1.el9_1 | RHSA-2022:8267 |
| RHEL 8 | perf +26 | 4.18.0-425.3.1.el8 | RHSA-2022:7683 |
Advisories 9
- USN-8224-1 linux-bluefield vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
- USN-7990-3 linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7990-4 linux-oracle, linux-oracle-5.4 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7990-5 linux-azure, linux-azure-5.4, linux-azure-fips vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7990-6 linux-raspi, linux-raspi-5.4 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7990-2 linux-aws-fips, linux-fips, linux-gcp-fips vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7990-1 linux, linux-aws, linux-aws-5.4, linux-gcp, linux-gcp-5.4, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-iot, linux-kvm vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- RHSA-2022:8267 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2022:7683 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026