Description
A vulnerability was found due to missing lock for IOPOLL flaw in io_cqring_event_overflow() in io_uring.c in Linux Kernel. This flaw allows a local attacker with user privilege to trigger a Denial of Service threat.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | kernel | Kernel Linux prior to Kernel 6.2 RC5 | — |
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 | 6.3.7-1 | — |
| Debian 13 | linux | 6.3.7-1 | — |
| Debian 12 | linux | 6.1.52-1 | DSA-5492-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | linux-allwinner-5.19 | 5.19.0-1015.15~22.04.1 | USN-6192-1 |
| Ubuntu 22.04 LTS | linux-aws-5.19 +1 | 5.19.0-1028.29~22.04.1 | USN-6192-1 |
| Ubuntu 22.04 LTS | linux-gcp-5.19 | 5.19.0-1027.29~22.04.1 | USN-6192-1 |
| Ubuntu 22.04 LTS | linux-hwe-5.19 | 5.19.0-46.47~22.04.1 | USN-6192-1 |
| Ubuntu 22.04 LTS | linux-oem-6.0 | 6.0.0-1019.19 | USN-6235-1 |
| Ubuntu 22.04 LTS | linux-oem-6.1 | 6.1.0-1015.15 | USN-6194-1 |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv-5.19 | 5.19.0-1021.23~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-starfive-5.19 | 5.19.0-1020.22~22.04.1 | USN-6192-1 |
| Ubuntu 20.04 LTS | linux-riscv +23 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | kernel-64kb +6 | 5.14.21-150500.55.7.1 | SUSE-SU-2023:2871-1 |
| SLES 15 SP5 | kernel-azure +2 | 5.14.21-150500.33.6.1 | SUSE-SU-2023:2892-1 |
| SLES 15 SP5 | kernel-default-base | 5.14.21-150500.55.7.1.150500.6.2.5 | SUSE-SU-2023:2871-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Live Patching 15 SP5 | kernel-default | 5.14.21-150500.55.7.1 | SUSE-SU-2023:2871-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5-RT_Update_3 | 1-150500.11.5.1 | SUSE-SU-2023:3302-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_1 | 1-150500.11.7.1 | SUSE-SU-2023:2871-1 |
| SUSE Real Time Module 15 SP5 | kernel-rt +3 | 5.14.21-150500.13.11.1 | SUSE-SU-2023:3302-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.5 | dtb-aarch64 +10 | 5.14.21-150500.55.7.1 | SUSE-SU-2023:2871-1 |
| openSUSE Leap 15.5 | kernel-azure +2 | 5.14.21-150500.33.6.1 | SUSE-SU-2023:2892-1 |
| openSUSE Leap 15.5 | kernel-default-base | 5.14.21-150500.55.7.1.150500.6.2.5 | SUSE-SU-2023:2871-1 |
| openSUSE Leap 15.5 | kernel-rt +3 | 5.14.21-150500.13.11.1 | SUSE-SU-2023:3302-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.1.52-71.125 | 1.0-0.amzn2023 | ALAS2023-2023-349 |
| Amazon Linux 2023 | perf +12 | 6.1.52-71.125.amzn2023 | ALAS2023-2023-349 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.137.1-1 | — |
Advisories 9
- USN-6235-1 linux-oem-6.0 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6192-1 linux, linux-allwinner, linux-allwinner-5.19, linux-aws, linux-aws-5.19, linux-azure, linux-gcp, linux-gcp-5.19, linux-hwe-5.19, linux-ibm, linux-kvm, linux-lowlatency, linux-oracle, linux-raspi, linux-starfive, linux-starfive-5.19 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-6194-1 linux-oem-6.1 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- DSA-5492-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2023:2871-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3302-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2892-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2023-2023-349 Important: kernel security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Sep 20, 2023
- WID-SEC-2023-1106 Linux Kernel: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Sep 10, 2023