CVE-2022-50346 Details
Description
In the Linux kernel, the following vulnerability has been resolved: ext4: init quota for 'old.inode' in 'ext4_rename' Syzbot found the following issue: ext4_parse_param: s_want_extra_isize=128 ext4_inode_info_init: s_want_extra_isize=32 ext4_rename: old.inode=ffff88823869a2c8 old.dir=ffff888238699828 new.inode=ffff88823869d7e8 new.dir=ffff888238699828 __ext4_mark_inode_dirty: inode=ffff888238699828 ea_isize=32 want_ea_size=128 __ext4_mark_inode_dirty: inode=ffff88823869a2c8 ea_isize=32 want_ea_size=128 ext4_xattr_block_set: inode=ffff88823869a2c8 ------------[ cut here ]------------ WARNING: CPU: 13 PID: 2234 at fs/ext4/xattr.c:2070 ext4_xattr_block_set.cold+0x22/0x980 Modules linked in: RIP: 0010:ext4_xattr_block_set.cold+0x22/0x980 RSP: 0018:ffff888227d3f3b0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: ffff88823007a000 RCX: 0000000000000000 RDX: 0000000000000a03 RSI: 0000000000000040 RDI: ffff888230078178 RBP: 0000000000000000 R08: 000000000000002c R09: ffffed1075c7df8e R10: ffff8883ae3efc6b R11: ffffed1075c7df8d R12: 0000000000000000 R13: ffff88823869a2c8 R14: ffff8881012e0460 R15: dffffc0000000000 FS: 00007f350ac1f740(0000) GS:ffff8883ae200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f350a6ed6a0 CR3: 0000000237456000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> ? ext4_xattr_set_entry+0x3b7/0x2320 ? ext4_xattr_block_set+0x0/0x2020 ? ext4_xattr_set_entry+0x0/0x2320 ? ext4_xattr_check_entries+0x77/0x310 ? ext4_xattr_ibody_set+0x23b/0x340 ext4_xattr_move_to_block+0x594/0x720 ext4_expand_extra_isize_ea+0x59a/0x10f0 __ext4_expand_extra_isize+0x278/0x3f0 __ext4_mark_inode_dirty.cold+0x347/0x410 ext4_rename+0xed3/0x174f vfs_rename+0x13a7/0x2510 do_renameat2+0x55d/0x920 __x64_sys_rename+0x7d/0xb0 do_syscall_64+0x3b/0xa0 entry_SYSCALL_64_after_hwframe+0x72/0xdc As 'ext4_rename' will modify 'old.inode' ctime and mark inode dirty, which may trigger expand 'extra_isize' and allocate block. If inode didn't init quota will lead to warning. To solve above issue, init 'old.inode' firstly in 'ext4_rename'.
A vulnerability exists in the Linux kernel's ext4 file system related to the handling of inode quotas during rename operations. When the 'ext4_rename' function is called, it modifies the 'old.inode' timestamp and marks it as dirty. This can trigger a process that expands the inode's extra size and allocates a block. If the inode's quota has not been properly initialized, it can lead to a warning. This issue was identified by Syzbot, which reported that the 'old.inode' quota was not initialized before the rename operation, causing a mismatch in expected and actual attribute sizes.
The vulnerability has been addressed in the Linux kernel by modifying the 'ext4_rename' function to include the necessary quota initialization for the 'old.inode' before any modifications are made. Users should upgrade to the latest stable version of the Linux kernel where this fix has been applied.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jan 14, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/13271fbbe85d73a7c47058f56a52f2a7f00d6e39 | kernel.org | Patch |
| https://git.kernel.org/stable/c/135ba9146f4d38abed48a540ef8a8770ff0bd34f | kernel.org | Patch |
| https://git.kernel.org/stable/c/33fd7031d634f3b46e59f61adfbb0ea9fe514fef | kernel.org | Patch |
| https://git.kernel.org/stable/c/67f6d5a4043f3db0c6bb0e14a0d97a7be8bfb8b5 | kernel.org | Patch |
| https://git.kernel.org/stable/c/7dfb8259f66faafa68d23a261b284d2c2c67649b | kernel.org | Patch |
| https://git.kernel.org/stable/c/84a2f2ed49d6a4d92b354219077434c57d334620 | kernel.org | Patch |
| https://git.kernel.org/stable/c/def7a39091e60e1c4a2f623629082a00092602be | kernel.org | Patch |
| https://git.kernel.org/stable/c/f263e349bacc2f303526dcfa61c4bc50132418b1 | kernel.org | Patch |
| https://git.kernel.org/stable/c/fae381a3d79bb94aa2eb752170d47458d778b797 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-908 | Use of Uninitialized Resource | [email protected] |
| CWE-908 | Use of Uninitialized Resource | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | < 4.9.337 >= 4.10, < 4.14.303 >= 4.15, < 4.19.270 >= 4.20, < 5.4.229 >= 5.5, < 5.10.163 >= 5.11, < 5.15.87 >= 5.16, < 6.0.18 >= 6.1, < 6.1.4 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jan 14, 2026 | CVE Modified | CISA-ADP |
| Dec 1, 2025 | Initial Analysis | [email protected] |
| Sep 16, 2025 | New CVE Received | kernel.org |