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Vulnerability · Published Feb 26, 2025 · Assigned by Linux

CVE-2022-49395um: Fix out-of-bounds read in LDT setup

High 7.1

In plain English

A high-severity out-of-bounds read 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 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.1High
Exploit odds (30 days)0.3%top 78.5% 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: um: Fix out-of-bounds read in LDT setup syscall_stub_data() expects the data_count parameter to be the number of longs, not bytes. ================================================================== BUG: KASAN: stack-out-of-bounds in syscall_stub_data+0x70/0xe0 Read of size 128 at addr 000000006411f6f0 by task swapper/1 CPU: 0 PID: 1 Comm: swapper Not tainted 5.18.0+ #18 Call Trace: show_stack.cold+0x166/0x2a7 __dump_stack+0x3a/0x43 dump_stack_lvl+0x1f/0x27 print_report.cold+0xdb/0xf81 kasan_report+0x119/0x1f0 kasan_check_range+0x3a3/0x440 memcpy+0x52/0x140 syscall_stub_data+0x70/0xe0 write_ldt_entry+0xac/0x190 init_new_ldt+0x515/0x960 init_new_context+0x2c4/0x4d0 mm_init.constprop.0+0x5ed/0x760 mm_alloc+0x118/0x170 0x60033f48 do_one_initcall+0x1d7/0x860 0x60003e7b kernel_init+0x6e/0x3d4 new_thread_handler+0x1e7/0x2c0 The buggy address belongs to stack of task swapper/1 and is located at offset 64 in frame: init_new_ldt+0x0/0x960 This frame has 2 objects: [32, 40) 'addr' [64, 80) 'desc' ==================================================================

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-abi-stablelists4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-core4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-cross-headers4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-debug4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-debug-core4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-debug-devel4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-debug-modules4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-devel4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-doc4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-headers4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-modules4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-modules-extra4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-rt4.18.0-553.56.1.rt7.397.el8_10ALSA-2025:8744
AlmaLinux:8kernel-rt-core4.18.0-553.56.1.rt7.397.el8_10ALSA-2025:8744
AlmaLinux:8kernel-rt-debug4.18.0-553.56.1.rt7.397.el8_10ALSA-2025:8744
AlmaLinux:8kernel-rt-debug-core4.18.0-553.56.1.rt7.397.el8_10ALSA-2025:8744
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.56.1.rt7.397.el8_10ALSA-2025:8744
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.56.1.rt7.397.el8_10ALSA-2025:8744
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.56.1.rt7.397.el8_10ALSA-2025:8744
AlmaLinux:8kernel-rt-devel4.18.0-553.56.1.rt7.397.el8_10ALSA-2025:8744
AlmaLinux:8kernel-rt-modules4.18.0-553.56.1.rt7.397.el8_10ALSA-2025:8744
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.56.1.rt7.397.el8_10ALSA-2025:8744
AlmaLinux:8kernel-tools4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-tools-libs4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-zfcpdump4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8perf4.18.0-553.56.1.el8_10ALSA-2025:8743
AlmaLinux:8python3-perf4.18.0-553.56.1.el8_10ALSA-2025:8743
Debian:12linux5.18.5-1DEBIAN-CVE-2022-49395
Debian:13linux5.18.5-1DEBIAN-CVE-2022-49395
Debian:14linux5.18.5-1DEBIAN-CVE-2022-49395
Rocky Linux:8kernel0:4.18.0-553.56.1.el8_10RLSA-2025:8743
Rocky Linux:8kernel-rt0:4.18.0-553.56.1.rt7.397.el8_10RLSA-2025:8744
Ubuntu:22.04:LTSlinux5.15.0-47.51UBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-aws5.15.0-1019.23UBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-azure5.15.0-1019.24UBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-gcp5.15.0-1017.23UBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-gke5.15.0-1015.18UBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1002.4UBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-ibm5.15.0-1013.15UBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1015.20UBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-kvm5.15.0-1017.21UBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-47.53UBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1007.7UBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-oracle5.15.0-1017.22UBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-raspi5.15.0-1014.16UBUNTU-CVE-2022-49395
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2022-49395
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2022-49395

Affected products (as reported)

VendorProductVersions
Linux Linux 858259cf7d1c443c836a2022b78cb281f0a9b95e – before 668ca34a428d6ffc0f99a1a6a9b661a288d4183b858259cf7d1c443c836a2022b78cb281f0a9b95e – before ef1dc929a1e5fa1b2d842256db9fb8710d3be910858259cf7d1c443c836a2022b78cb281f0a9b95e – before 3549ab4b962cf619e8c55484a0d870a34b3f845f858259cf7d1c443c836a2022b78cb281f0a9b95e – before 9caad70819aef3431abaf73ba5163b55b161aba0858259cf7d1c443c836a2022b78cb281f0a9b95e – before cf0dabc37446c5ee538ae7b4c467ab0e53fa5463858259cf7d1c443c836a2022b78cb281f0a9b95e – before 10995a382271254bd276627ec74136da4a23c4a6858259cf7d1c443c836a2022b78cb281f0a9b95e – before 24ca648bf5f72ed8878cf09b5d4431935779681e858259cf7d1c443c836a2022b78cb281f0a9b95e – before 91e5ba2af2d729d5126aefd5aa3eadc69b8426e5
Linux Linux 2.6.15

Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

References