Description
A memory leak in the __ipmi_bmc_register() function in drivers/char/ipmi/ipmi_msghandler.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering ida_simple_get() failure, aka CID-4aa7afb0ee20. NOTE: third parties dispute the relevance of this because an attacker cannot realistically control this failure at probe time
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 | 5.4.19-1 | — |
| Debian 13 | linux | 5.4.19-1 | — |
| Debian 12 | linux | 5.4.19-1 | — |
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 +2 | No fix yet | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-91.92 | USN-4302-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1063.67 | USN-4302-1 |
| Ubuntu 18.04 LTS | linux-aws-5.0 +3 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-azure | 5.0.0-1036.38 | USN-4325-1 |
| Ubuntu 18.04 LTS | linux-azure-5.3 | 5.3.0-1019.20~18.04.1 | USN-4319-1 |
| Ubuntu 18.04 LTS | linux-gcp | 5.0.0-1034.35 | USN-4325-1 |
| Ubuntu 18.04 LTS | linux-gcp-5.3 +1 | 5.3.0-1017.18~18.04.1 | USN-4319-1 |
| Ubuntu 18.04 LTS | linux-gke-4.15 | 4.15.0-1055.58 | USN-4302-1 |
| Ubuntu 18.04 LTS | linux-gke-5.0 | 5.0.0-1033.34 | USN-4325-1 |
| Ubuntu 18.04 LTS | linux-hwe | 5.3.0-46.38~18.04.1 | USN-4319-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1056.57 | USN-4302-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1076.86 | USN-4302-1 |
| Ubuntu 18.04 LTS | linux-oem-osp1 | 5.0.0-1047.52 | USN-4325-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1035.39 | USN-4302-1 |
| Ubuntu 18.04 LTS | linux-oracle-5.0 | 5.0.0-1014.19 | USN-4325-1 |
| Ubuntu 18.04 LTS | linux-oracle-5.3 | 5.3.0-1014.15~18.04.1 | USN-4319-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1057.61 | USN-4302-1 |
| Ubuntu 18.04 LTS | linux-raspi2-5.3 | 5.3.0-1022.24~18.04.1 | USN-4319-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1074.81 | USN-4302-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1063.67~16.04.1 | USN-4302-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1075.80 | USN-4302-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1058.62 | USN-4302-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-91.92~16.04.1 | USN-4302-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1035.38~16.04.1 | USN-4302-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 18.04 LTS | linux-aws-fips +2 | No fix yet | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2018.18 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2006.7 | — |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1074.79~14.04.1 | USN-4302-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-240.rt7.54.el8 | RHSA-2020:4609 |
| RHEL 8 | perf +26 | 4.18.0-240.el8 | RHSA-2020:4431 |
| RHEL 7 | kernel +15 | 3.10.0-1160.el7 | RHSA-2020:4060, RHSA-2020:3545 |
| RHEL 7 | kernel-alt | 4.14.0-115.29.1.el7a | RHSA-2020:3545 |
| RHEL 7 | kernel-rt +10 | 3.10.0-1160.rt56.1131.el7 | RHSA-2020:4062 |
| RHEL 7 | perf +3 | 3.10.0-957.65.1.el7 | RHSA-2020:5656, RHSA-2020:4060, RHSA-2020:3545 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7.7 EUS | perf +18 | 3.10.0-1062.40.1.el7 | RHSA-2020:5206 |
| RHEL 7.6 EUS | perf +19 | 3.10.0-957.65.1.el7 | RHSA-2020:5656 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | kernel-tools-libs-devel | 4.18.0-240.el8 | ALSA-2020:4431 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | kernel-azure +2 | 4.12.14-8.22.1 | SUSE-SU-2019:3372-1 |
| SLES 15 SP1 | kernel-docs | 4.12.14-197.29.2 | SUSE-SU-2019:3317-1 |
| SLES 15 SP1 | kernel-syms +4 | 4.12.14-197.29.1 | SUSE-SU-2019:3317-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.7.1 | SUSE-SU-2020:0093-1 |
| SLES 12 SP5 | kernel-docs +4 | 4.12.14-122.7.1 | SUSE-SU-2019:3200-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.7.1 | SUSE-SU-2020:0093-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.7.1 | SUSE-SU-2019:3200-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.29.1 | SUSE-SU-2019:3317-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_8 | 1-3.3.1 | SUSE-SU-2019:3317-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.7.1 | SUSE-SU-2019:3200-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_1 | 1-8.7.1 | SUSE-SU-2019:3200-1 |
| SUSE Real Time Module 15 SP1 | kernel-rt +3 | 4.12.14-14.17.1 | SUSE-SU-2020:0613-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | kernel-docs +8 | 4.12.14-lp151.28.36.1 | openSUSE-SU-2019:2675-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-240.el8 | ELSA-2020-4431 |
| Oracle Linux 7 | perf +12 | 3.10.0-1160.el7 | ELSA-2020-4060 |
Advisories 20
- ALSA-2020:4431 Moderate: kernel security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2020:4431 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2020:4062 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2020:4060 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2020:4609 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2020:5656 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:5206 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:3545 Red Hat Security Advisory: kernel-alt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-4302-1 linux, linux-aws, linux-aws-hwe, linux-gcp, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon, linux-azure vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4319-1 linux, linux-aws, linux-gcp, linux-gcp-5.3, linux-hwe, linux-kvm, linux-oracle, linux-oracle-5.3, linux-raspi2, linux-raspi2-5.3 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4325-1 linux-azure, linux-gcp, linux-gke-5.0, linux-oem-osp1, linux-oracle-5.0 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- openSUSE-SU-2019:2675-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:3372-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0093-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:3317-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-0198 Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Dec 9, 2025
- SUSE-SU-2020:0613-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2019:3200-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2020-4431 Moderate: kernel security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 10, 2020
- ELSA-2020-4060 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 6, 2020
References
- https://github.com/torvalds/linux/commit/4aa7afb0ee20a97fbf0c5bab3df028d5fb85fdab
- https://bugzilla.suse.com/show_bug.cgi?id=1157304
- FEDORA-2019-021c968423 vendor-advisory
- FEDORA-2019-34a75d7e61 vendor-advisory
- openSUSE-SU-2019:2675 vendor-advisory
- USN-4302-1 vendor-advisory
- USN-4325-1 vendor-advisory
- USN-4319-1 vendor-advisory