What is CVE-2022-50673?

CVE-2022-50673 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 4.10 onward and patched in 4.19.270, 5.4.229, 5.10.163 and others. CVE-2022-50673 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-50673?

CVE-2022-50673 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2022-50673?

Yes, CVE-2022-50673 has been patched. Fixed versions include 4.19.270, 5.4.229, 5.10.163 and others. If you are running Linux kernel 4.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2022-50673 actively exploited?

CVE-2022-50673 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2022-50673

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.

Package Linux Kernel

Published 2025-12-09

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 4.10 and later are affected. Fixed in 4.19.270, 5.4.229, 5.10.163, 5.15.87, 6.0.18, 6.1.4, 6.2 and their respective stable series.

Affected from

≥ 4.10

Fixed in

✓ 4.19.270 4.19.x ✓ 5.4.229 5.4.x ✓ 5.10.163 5.10.x ✓ 5.15.87 5.15.x ✓ 6.0.18 6.0.x ✓ 6.1.4 6.1.x ✓ 6.2

References

The following references provide additional information about CVE-2022-50673 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/026a4490b5381229a30f23d073b58e8e35ee6858
Patch
Kernel patch commit
https://git.kernel.org/stable/c/7223d5e75f26352354ea2c0ccf8b579821b52adf
Patch
Kernel patch commit
https://git.kernel.org/stable/c/7908b8a541b1578cc61b4da7f19b604a931441da
Patch

7 patch commits total View all on NVD

Frequently asked questions

What is CVE-2022-50673?

CVE-2022-50673 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.10 onward and has been patched in 4.19.270, 5.4.229, 5.10.163 and others. CVE-2022-50673 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2022-50673?

Yes — CVE-2022-50673 has been patched. Fixed versions include 4.19.270, 5.4.229, 5.10.163 and others. If you are running Linux kernel 4.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2022-50673 actively exploited?

No — CVE-2022-50673 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.