Description
A memory leak in the cx23888_ir_probe() function in drivers/media/pci/cx23885/cx23888-ir.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering kfifo_alloc() failures, aka CID-a7b2df76b42b.
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 | 5.5.13-1 | — |
| Debian 13 | linux | 5.5.13-1 | — |
| Debian 12 | linux | 5.5.13-1 | — |
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 | 5.4.0-48.52 | USN-4525-1 |
| Ubuntu 20.04 LTS | linux-aws +2 | 5.4.0-1025.25 | USN-4525-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1026.26 | USN-4525-1 |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1024.24 | USN-4525-1 |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1019.21 | USN-4525-1 |
| Ubuntu 20.04 LTS | linux-raspi2 +1 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-riscv | 5.4.0-34.38 | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-118.119 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1083.87 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-aws-5.4 +2 | 5.4.0-1025.25~18.04.1 | USN-4525-1 |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1096.106 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1026.26~18.04.1 | USN-4525-1 |
| Ubuntu 18.04 LTS | linux-gcp +11 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1084.95 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-gke-4.15 | 4.15.0-1070.73 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-48.52~18.04.1 | USN-4525-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1075.76 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1097.107 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1054.58 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1019.21~18.04.1 | USN-4525-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1071.75 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1087.95 | USN-4526-1 |
| Ubuntu 16.04 LTS | linux | 4.4.0-190.220 | USN-4527-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1114.127 | USN-4527-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1083.87~16.04.1 | USN-4526-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1096.106~16.04.1 | USN-4526-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1084.95~16.04.1 | USN-4526-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-118.119~16.04.1 | USN-4526-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1080.87 | USN-4527-1 |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1054.58~16.04.1 | USN-4526-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1139.148 | USN-4527-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1143.152 | USN-4527-1 |
Show 7 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 16.04 LTS | linux-fips | 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 | 4.15.0-2027.27 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2009.10 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1041.46 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1046.51 | — |
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1078.82 | USN-4527-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1096.106~14.04.1 | USN-4526-1 |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-190.220~14.04.1 | USN-4527-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | kernel-azure +2 | 4.12.14-8.27.1 | SUSE-SU-2020:0511-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.34.1 | SUSE-SU-2020:0560-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150.52.1 | SUSE-SU-2020:1663-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.10.1 | SUSE-SU-2020:0558-1 |
| SLES 12 SP5 | kernel-docs | 4.12.14-122.17.2 | SUSE-SU-2020:0580-1 |
| SLES 12 SP5 | kernel-syms +3 | 4.12.14-122.17.1 | SUSE-SU-2020:0580-1 |
| SLES 12 SP4 | kernel-azure +2 | 4.12.14-6.37.1 | SUSE-SU-2020:0559-1 |
| SLES 12 SP4 | kernel-docs +4 | 4.12.14-95.48.1 | SUSE-SU-2020:0584-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 | kernel-docs +5 | 4.12.14-150.52.1 | SUSE-SU-2020:1663-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.10.1 | SUSE-SU-2020:0558-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.17.1 | SUSE-SU-2020:0580-1 |
| SLES for SAP 12 SP4 | kernel-azure +2 | 4.12.14-6.37.1 | SUSE-SU-2020:0559-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.48.1 | SUSE-SU-2020:0584-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-6.3.1 | SUSE-SU-2020:0605-1 |
| SLE Real Time 12 SP4 | kernel-rt +3 | 4.12.14-8.12.1 | SUSE-SU-2020:0599-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.34.1 | SUSE-SU-2020:0560-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_9 | 1-3.5.1 | SUSE-SU-2020:0560-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.52.1 | SUSE-SU-2020:1663-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_18 | 1-1.5.1 | SUSE-SU-2020:1663-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.17.1 | SUSE-SU-2020:0580-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_3 | 1-8.5.1 | SUSE-SU-2020:0580-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.48.1 | SUSE-SU-2020:0584-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_12 | 1-6.3.1 | SUSE-SU-2020:0584-1 |
| SLE HPC 15 | kernel-docs +5 | 4.12.14-150.52.1 | SUSE-SU-2020:1663-1 |
| 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-lp151.28.40.1 | openSUSE-SU-2020:0336-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.192-147.314 | 1.0-0.amzn2 | ALAS2-2020-1480 |
| Amazon Linux 2 | perf +8 | 4.14.192-147.314.amzn2 | ALAS2-2020-1480 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.48.1.el6uek | 0.4.5-3.el6 | ELSA-2020-5802 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.48.1.el7uek | 0.4.5-3.el7 | ELSA-2020-5802 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.48.1.el7uek | ELSA-2020-5805, ELSA-2020-5802, ELSA-2020-5801 |
| Oracle Linux 7 | perf +5 | 4.14.35-1902.304.6.el7uek | ELSA-2020-5805, ELSA-2020-5755 |
Advisories 20
- USN-4526-1 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-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4527-1 linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4525-1 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
- SUSE-SU-2020:0599-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0584-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0559-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0580-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0336-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0560-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0558-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1663-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0511-1 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-2020:0605-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2020:0613-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ALAS2-2020-1480 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 19, 2024
- ELSA-2020-5805 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 10, 2020
- ELSA-2020-5801 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 6, 2020
- ELSA-2020-5802 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 6, 2020
- ELSA-2020-5755 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 10, 2020
References
- https://github.com/torvalds/linux/commit/a7b2df76b42bdd026e3106cf2ba97db41345a177
- FEDORA-2019-021c968423 vendor-advisory
- FEDORA-2019-34a75d7e61 vendor-advisory
- https://security.netapp.com/advisory/ntap-20191205-0001/
- openSUSE-SU-2020:0336 vendor-advisory
- USN-4527-1 vendor-advisory
- USN-4526-1 vendor-advisory
- USN-4525-1 vendor-advisory