Description
A memory leak in the crypto_reportstat() function in crypto/crypto_user_stat.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering crypto_reportstat_alg() failures, aka CID-c03b04dcdba1.
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 | 5.4.6-1 | — |
| Debian 13 | linux | 5.4.6-1 | — |
| Debian 12 | linux | 5.4.6-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +4 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-aws-5.0 | 5.0.0-1024.27~18.04.1 | USN-4258-1 |
| Ubuntu 18.04 LTS | linux-azure | 5.0.0-1029.31~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-azure-5.3 | 5.3.0-1013.14~18.04.1 | USN-4284-1 |
| Ubuntu 18.04 LTS | linux-gcp +1 | 5.0.0-1029.30~18.04.1 | USN-4258-1 |
| Ubuntu 18.04 LTS | linux-gcp-5.3 +1 | 5.3.0-1012.13~18.04.1 | USN-4284-1 |
| Ubuntu 18.04 LTS | linux-gcp-edge +2 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-hwe | 5.3.0-40.32~18.04.1 | USN-4284-1 |
| Ubuntu 18.04 LTS | linux-oem-osp1 | 5.0.0-1037.42 | — |
| Ubuntu 18.04 LTS | linux-oracle-5.0 | 5.0.0-1010.15~18.04.1 | USN-4258-1 |
| Ubuntu 18.04 LTS | linux-raspi2-5.3 | 5.3.0-1018.20~18.04.1 | USN-4284-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Advisories 3
- USN-4258-1 linux-aws-5.0, linux-gcp, linux-gke-5.0, linux-oracle-5.0 vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-4284-1 linux, linux-aws, linux-azure, linux-azure-5.3, linux-gcp, linux-gcp-5.3, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-raspi2-5.3 vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- WID-SEC-2023-0198 Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Dec 9, 2025
References
- https://github.com/torvalds/linux/commit/c03b04dcdba1da39903e23cc4d072abf8f68f2dd
- FEDORA-2019-021c968423 vendor-advisory
- FEDORA-2019-34a75d7e61 vendor-advisory
- https://security.netapp.com/advisory/ntap-20191205-0001/
- USN-4258-1 vendor-advisory
- http://packetstormsecurity.com/files/156455/Kernel-Live-Patch-Security-Notice-LSN-0063-1.html
- USN-4284-1 vendor-advisory