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Vulnerability · Published Dec 9, 2025 · Assigned by Linux

CVE-2022-50673ext4: fix use-after-free in ext4_orphan_cleanup

High 7.8

In plain English

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

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 88.9% 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: ext4: fix use-after-free in ext4_orphan_cleanup I caught a issue as follows: ================================================================== BUG: KASAN: use-after-free in __list_add_valid+0x28/0x1a0 Read of size 8 at addr ffff88814b13f378 by task mount/710 CPU: 1 PID: 710 Comm: mount Not tainted 6.1.0-rc3-next #370 Call Trace: <TASK> dump_stack_lvl+0x73/0x9f print_report+0x25d/0x759 kasan_report+0xc0/0x120 __asan_load8+0x99/0x140 __list_add_valid+0x28/0x1a0 ext4_orphan_cleanup+0x564/0x9d0 [ext4] __ext4_fill_super+0x48e2/0x5300 [ext4] ext4_fill_super+0x19f/0x3a0 [ext4] get_tree_bdev+0x27b/0x450 ext4_get_tree+0x19/0x30 [ext4] vfs_get_tree+0x49/0x150 path_mount+0xaae/0x1350 do_mount+0xe2/0x110 __x64_sys_mount+0xf0/0x190 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd </TASK> [...] ================================================================== Above issue may happen as follows: ------------------------------------- ext4_fill_super ext4_orphan_cleanup --- loop1: assume last_orphan is 12 --- list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan) ext4_truncate --> return 0 ext4_inode_attach_jinode --> return -ENOMEM iput(inode) --> free inode<12> --- loop2: last_orphan is still 12 --- list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); // use inode<12> and trigger UAF To solve this issue, we need to propagate the return value of ext4_inode_attach_jinode() appropriately.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-abi-stablelists4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-core4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-cross-headers4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-debug4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-debug-core4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-debug-devel4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-debug-modules4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-devel4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-doc4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-headers4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-modules4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-modules-extra4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-rt4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:8kernel-rt-core4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:8kernel-rt-debug4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:8kernel-rt-debug-core4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:8kernel-rt-devel4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:8kernel-rt-modules4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:8kernel-tools4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-tools-libs4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-zfcpdump4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8perf4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8python3-perf4.18.0-553.104.1.el8_10ALSA-2026:2264
Debian:12linux6.1.4-1DEBIAN-CVE-2022-50673
Debian:13linux6.1.4-1DEBIAN-CVE-2022-50673
Debian:14linux6.1.4-1DEBIAN-CVE-2022-50673
Rocky Linux:8kernel0:4.18.0-553.104.1.el8_10RLSA-2026:2264
Ubuntu:22.04:LTSlinux5.15.0-69.76UBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-aws5.15.0-1033.37UBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-azure5.15.0-1035.42UBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2022-50673
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1035.42.1UBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-gcp5.15.0-1031.38UBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2022-50673
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-gke5.15.0-1030.35UBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1017.22UBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2022-50673
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-ibm5.15.0-1027.30UBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1027.32UBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-kvm5.15.0-1030.35UBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-69.76UBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2022-50673
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1023.23UBUNTU-CVE-2022-50673
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2022-50673
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2022-50673
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-oracle5.15.0-1032.38UBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-raspi5.15.0-1026.28UBUNTU-CVE-2022-50673
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-50673
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-50673
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2022-50673
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2022-50673
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2022-50673

Affected products (as reported)

VendorProductVersions
Linux Linux 2c98eb5ea249767bbc11cf4e70e91d5b0458ed13 – before 7f801a1593cb957f73659732836b2dafbdfc77092c98eb5ea249767bbc11cf4e70e91d5b0458ed13 – before 026a4490b5381229a30f23d073b58e8e35ee68582c98eb5ea249767bbc11cf4e70e91d5b0458ed13 – before 7223d5e75f26352354ea2c0ccf8b579821b52adf2c98eb5ea249767bbc11cf4e70e91d5b0458ed13 – before cf0e0817b0f925b70d101d7014ea81b7094e11592c98eb5ea249767bbc11cf4e70e91d5b0458ed13 – before c2bdbd4c69308835d1b6f6ba74feeccbfe1134782c98eb5ea249767bbc11cf4e70e91d5b0458ed13 – before 7908b8a541b1578cc61b4da7f19b604a931441da2c98eb5ea249767bbc11cf4e70e91d5b0458ed13 – before a71248b1accb2b42e4980afef4fa4a27fa0e36f5
Linux Linux 4.10

References