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Vulnerability · Published Dec 30, 2025 · Assigned by Linux

CVE-2023-54194exfat: use kvmalloc_array/kvfree instead of kmalloc_array/kfree

Unrated

In plain English

A 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 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 89.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: exfat: use kvmalloc_array/kvfree instead of kmalloc_array/kfree The call stack shown below is a scenario in the Linux 4.19 kernel. Allocating memory failed where exfat fs use kmalloc_array due to system memory fragmentation, while the u-disk was inserted without recognition. Devices such as u-disk using the exfat file system are pluggable and may be insert into the system at any time. However, long-term running systems cannot guarantee the continuity of physical memory. Therefore, it's necessary to address this issue. Binder:2632_6: page allocation failure: order:4, mode:0x6040c0(GFP_KERNEL|__GFP_COMP), nodemask=(null) Call trace: [242178.097582] dump_backtrace+0x0/0x4 [242178.097589] dump_stack+0xf4/0x134 [242178.097598] warn_alloc+0xd8/0x144 [242178.097603] __alloc_pages_nodemask+0x1364/0x1384 [242178.097608] kmalloc_order+0x2c/0x510 [242178.097612] kmalloc_order_trace+0x40/0x16c [242178.097618] __kmalloc+0x360/0x408 [242178.097624] load_alloc_bitmap+0x160/0x284 [242178.097628] exfat_fill_super+0xa3c/0xe7c [242178.097635] mount_bdev+0x2e8/0x3a0 [242178.097638] exfat_fs_mount+0x40/0x50 [242178.097643] mount_fs+0x138/0x2e8 [242178.097649] vfs_kern_mount+0x90/0x270 [242178.097655] do_mount+0x798/0x173c [242178.097659] ksys_mount+0x114/0x1ac [242178.097665] __arm64_sys_mount+0x24/0x34 [242178.097671] el0_svc_common+0xb8/0x1b8 [242178.097676] el0_svc_handler+0x74/0x90 [242178.097681] el0_svc+0x8/0x340 By analyzing the exfat code,we found that continuous physical memory is not required here,so kvmalloc_array is used can solve this problem.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.52-1DEBIAN-CVE-2023-54194
Debian:13linux6.4.11-1DEBIAN-CVE-2023-54194
Debian:14linux6.4.11-1DEBIAN-CVE-2023-54194
Ubuntu:22.04:LTSlinux5.15.0-88.98UBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-aws5.15.0-1049.54UBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-azure5.15.0-1051.59UBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-54194
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1051.59.1UBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-gcp5.15.0-1046.54UBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-54194
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-gke5.15.0-1046.51UBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1032.38UBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-54194
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-ibm5.15.0-1042.45UBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1045.51UBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-kvm5.15.0-1046.51UBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-88.98UBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-54194
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1040.40UBUNTU-CVE-2023-54194
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1019.19UBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1006.6UBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-54194
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-54194
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-oracle5.15.0-1047.53UBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-raspi5.15.0-1042.45UBUNTU-CVE-2023-54194
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-54194
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-54194
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-54194
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-54194
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1025.29UBUNTU-CVE-2023-54194

Affected products (as reported)

VendorProductVersions
Linux Linux 1e49a94cf707204b66a3fb242f2814712c941f52 – before 79d16a84ea41272dfcb0c00f9798ddd0edd8098d1e49a94cf707204b66a3fb242f2814712c941f52 – before 8a34a242cf03211cc89f68308d149b793f63c4791e49a94cf707204b66a3fb242f2814712c941f52 – before 1427a7e96fb90d0896f74f5bcd21feb03cc7c3d01e49a94cf707204b66a3fb242f2814712c941f52 – before 0c5c3e8a2550b6b2a304b45f260296db9c09df961e49a94cf707204b66a3fb242f2814712c941f52 – before daf60d6cca26e50d65dac374db92e58de745ad26
Linux Linux 5.7

References