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CVE-2025-22121— ext4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all()

EPSS 0.09% · P25

Affected Version Matrix 16

VendorProductVersion RangeStatus
LinuxLinuxe50e5129f384ae282adebfb561189cdb19b81cee< 27202452b0bc942fdc3db72a44c4dcdab96d5b56affected
e50e5129f384ae282adebfb561189cdb19b81cee< b374e9ecc92aaa7fb2ab221ee3ff5451118ab566affected
e50e5129f384ae282adebfb561189cdb19b81cee< c000a8a9b5343a5ef867df173c6349672dacbd0faffected
e50e5129f384ae282adebfb561189cdb19b81cee< 3c591353956ffcace2cc74d09930774afed60619affected
e50e5129f384ae282adebfb561189cdb19b81cee< 098927a13fd918bd7c64c2de905350a1ad7b4a3aaffected
e50e5129f384ae282adebfb561189cdb19b81cee< 0c8fbb6ffb3c8f5164572ca88e4ccb6cd6a41ca8affected
e50e5129f384ae282adebfb561189cdb19b81cee< 5701875f9609b000d91351eaa6bfd97fe2f157f4affected
4.13affected
… +8 more rows
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I. Basic Information for CVE-2025-22121

Vulnerability Information
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Vulnerability Title
ext4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ext4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all() There's issue as follows: BUG: KASAN: use-after-free in ext4_xattr_inode_dec_ref_all+0x6ff/0x790 Read of size 4 at addr ffff88807b003000 by task syz-executor.0/15172 CPU: 3 PID: 15172 Comm: syz-executor.0 Call Trace: __dump_stack lib/dump_stack.c:82 [inline] dump_stack+0xbe/0xfd lib/dump_stack.c:123 print_address_description.constprop.0+0x1e/0x280 mm/kasan/report.c:400 __kasan_report.cold+0x6c/0x84 mm/kasan/report.c:560 kasan_report+0x3a/0x50 mm/kasan/report.c:585 ext4_xattr_inode_dec_ref_all+0x6ff/0x790 fs/ext4/xattr.c:1137 ext4_xattr_delete_inode+0x4c7/0xda0 fs/ext4/xattr.c:2896 ext4_evict_inode+0xb3b/0x1670 fs/ext4/inode.c:323 evict+0x39f/0x880 fs/inode.c:622 iput_final fs/inode.c:1746 [inline] iput fs/inode.c:1772 [inline] iput+0x525/0x6c0 fs/inode.c:1758 ext4_orphan_cleanup fs/ext4/super.c:3298 [inline] ext4_fill_super+0x8c57/0xba40 fs/ext4/super.c:5300 mount_bdev+0x355/0x410 fs/super.c:1446 legacy_get_tree+0xfe/0x220 fs/fs_context.c:611 vfs_get_tree+0x8d/0x2f0 fs/super.c:1576 do_new_mount fs/namespace.c:2983 [inline] path_mount+0x119a/0x1ad0 fs/namespace.c:3316 do_mount+0xfc/0x110 fs/namespace.c:3329 __do_sys_mount fs/namespace.c:3540 [inline] __se_sys_mount+0x219/0x2e0 fs/namespace.c:3514 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 Memory state around the buggy address: ffff88807b002f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807b002f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88807b003000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88807b003080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88807b003100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff Above issue happens as ext4_xattr_delete_inode() isn't check xattr is valid if xattr is in inode. To solve above issue call xattr_check_inode() check if xattr if valid in inode. In fact, we can directly verify in ext4_iget_extra_inode(), so that there is no divergent verification.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ext4_xattr_inode_dec_ref_all函数存在越界读取问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux e50e5129f384ae282adebfb561189cdb19b81cee ~ 27202452b0bc942fdc3db72a44c4dcdab96d5b56 -
LinuxLinux 4.13 -

II. Public POCs for CVE-2025-22121

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III. Intelligence Information for CVE-2025-22121

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Same Patch Batch · Linux · 2025-04-16 · 127 CVEs total

CVE-2025-220408.8 HIGHksmbd: fix session use-after-free in multichannel connection
CVE-2025-220418.8 HIGHksmbd: fix use-after-free in ksmbd_sessions_deregister()
CVE-2025-22092PCI: Fix NULL dereference in SR-IOV VF creation error path
CVE-2025-22106vmxnet3: unregister xdp rxq info in the reset path
CVE-2025-22105bonding: check xdp prog when set bond mode
CVE-2025-22104ibmvnic: Use kernel helpers for hex dumps
CVE-2025-22103net: fix NULL pointer dereference in l3mdev_l3_rcv
CVE-2025-22102Bluetooth: btnxpuart: Fix kernel panic during FW release
CVE-2025-22100drm/panthor: Fix race condition when gathering fdinfo group samples
CVE-2025-22101net: libwx: fix Tx L4 checksum
CVE-2025-22099drm: xlnx: zynqmp_dpsub: Add NULL check in zynqmp_audio_init
CVE-2025-22097drm/vkms: Fix use after free and double free on init error
CVE-2025-22098drm: zynqmp_dp: Fix a deadlock in zynqmp_dp_ignore_hpd_set()
CVE-2025-22096drm/msm/gem: Fix error code msm_parse_deps()
CVE-2025-22095PCI: brcmstb: Fix error path after a call to regulator_bulk_get()
CVE-2025-22094powerpc/perf: Fix ref-counting on the PMU 'vpa_pmu'
CVE-2025-22093drm/amd/display: avoid NPD when ASIC does not support DMUB
CVE-2025-22082iio: backend: make sure to NULL terminate stack buffer
CVE-2025-22081fs/ntfs3: Fix a couple integer overflows on 32bit systems
CVE-2025-22080fs/ntfs3: Prevent integer overflow in hdr_first_de()

Showing top 20 of 127 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-22121

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