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Vulnerability · Published Dec 27, 2024 · Assigned by Linux

CVE-2024-56584io_uring/tctx: work around xa_store() allocation error issue

Medium 5.5

In plain English

A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 85.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: io_uring/tctx: work around xa_store() allocation error issue syzbot triggered the following WARN_ON: WARNING: CPU: 0 PID: 16 at io_uring/tctx.c:51 __io_uring_free+0xfa/0x140 io_uring/tctx.c:51 which is the WARN_ON_ONCE(!xa_empty(&tctx->xa)); sanity check in __io_uring_free() when a io_uring_task is going through its final put. The syzbot test case includes injecting memory allocation failures, and it very much looks like xa_store() can fail one of its memory allocations and end up with ->head being non-NULL even though no entries exist in the xarray. Until this issue gets sorted out, work around it by attempting to iterate entries in our xarray, and WARN_ON_ONCE() if one is found.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.123-1DEBIAN-CVE-2024-56584
Debian:13linux6.12.5-1DEBIAN-CVE-2024-56584
Debian:14linux6.12.5-1DEBIAN-CVE-2024-56584
Ubuntu:22.04:LTSlinux5.15.0-186.196UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux5.15.0-186.196USN-8575-1
Ubuntu:24.04:LTSlinux6.8.0-58.60UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-aws5.15.0-1112.119USN-8575-2
Ubuntu:22.04:LTSlinux-aws5.15.0-1112.119UBUNTU-CVE-2024-56584
Ubuntu:24.04:LTSlinux-aws6.8.0-1027.29UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1027.29~22.04.1UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-azure5.15.0-1117.126USN-8575-3
Ubuntu:22.04:LTSlinux-azure5.15.0-1117.126UBUNTU-CVE-2024-56584
Ubuntu:24.04:LTSlinux-azure6.8.0-1027.32UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-56584
Ubuntu:24.04:LTSlinux-azure-6.116.11.0-1012.12~24.04.1UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1027.32~22.04.1UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1117.126USN-8610-1
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1117.126UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-56584
Ubuntu:24.04:LTSlinux-azure-nvidia6.8.0-1014.15UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-gcp5.15.0-1112.122UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-gcp5.15.0-1112.122USN-8575-1
Ubuntu:24.04:LTSlinux-gcp6.8.0-1028.30UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-56584
Ubuntu:24.04:LTSlinux-gcp-6.116.11.0-1011.11~24.04.1UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1028.30~22.04.1UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-gke5.15.0-1108.114UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-gke5.15.0-1108.114USN-8575-1
Ubuntu:24.04:LTSlinux-gke6.8.0-1023.27UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1095.103UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1095.103USN-8575-1
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1010.12UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-56584
Ubuntu:24.04:LTSlinux-hwe-6.116.11.0-21.21~24.04.1UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-58.60~22.04.1UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-ibm5.15.0-1106.110UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-ibm5.15.0-1106.110USN-8575-2
Ubuntu:24.04:LTSlinux-ibm6.8.0-1024.24UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1024.24~22.04.1UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1107.113USN-8620-4
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1107.113UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-kvm5.15.0-1104.109USN-8575-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1104.109UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-184.194UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-184.194USN-8575-1
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-58.60.1UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-58.60.1~22.04.1UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1107.108UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1107.108USN-8575-2
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1026.29UBUNTU-CVE-2024-56584
Ubuntu:24.04:LTSlinux-nvidia-6.116.11.0-1007.7UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1026.29~22.04.1UBUNTU-CVE-2024-56584
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1026.29.1UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1064.66USN-8576-2
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1064.66UBUNTU-CVE-2024-56584
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1008.8UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1053.53USN-8576-2
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1053.53UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-56584
Ubuntu:24.04:LTSlinux-oem-6.116.11.0-1017.17UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-56584
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1026.26UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-oracle5.15.0-1109.115USN-8575-3
Ubuntu:22.04:LTSlinux-oracle5.15.0-1109.115UBUNTU-CVE-2024-56584
Ubuntu:24.04:LTSlinux-oracle6.8.0-1024.25UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1024.25~22.04.1UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-raspi5.15.0-1106.109USN-8668-2
Ubuntu:22.04:LTSlinux-raspi5.15.0-1106.109UBUNTU-CVE-2024-56584
Ubuntu:24.04:LTSlinux-raspi6.8.0-1028.32UBUNTU-CVE-2024-56584
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-56584
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-56584
Ubuntu:24.04:LTSlinux-riscv6.8.0-58.60.1UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-58.60.1~22.04.1UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-56584
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1017.18UBUNTU-CVE-2024-56584
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1075.79USN-8575-1
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1075.79UBUNTU-CVE-2024-56584

Affected products (as reported)

VendorProductVersions
Linux Linux 2b188cc1bb857a9d4701ae59aa7768b5124e262e – before e05c070b401f6365c503e2b59f091331965c4fb92b188cc1bb857a9d4701ae59aa7768b5124e262e – before 3a84fa784710990964c1e35df743851ab28638982b188cc1bb857a9d4701ae59aa7768b5124e262e – before 94ad56f61b873ffeebcc620d451eacfbdf9d40f02b188cc1bb857a9d4701ae59aa7768b5124e262e – before 42882b583095dcf747da6e3af1daeff40e27033e2b188cc1bb857a9d4701ae59aa7768b5124e262e – before d5b2ddf1f90c7248eff9630b95895c8950f2f36d2b188cc1bb857a9d4701ae59aa7768b5124e262e – before 7eb75ce7527129d7f1fee6951566af409a37a1c4
Linux Linux 5.1

References