cbcvebase.
CVE-2024-49958
published 2024-10-21

CVE-2024-49958: In the Linux kernel, the following vulnerability has been resolved: ocfs2: reserve space for inline xattr before attaching reflink tree One of our customers…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.26%
17.3th percentile
In the Linux kernel, the following vulnerability has been resolved: ocfs2: reserve space for inline xattr before attaching reflink tree One of our customers reported a crash and a corrupted ocfs2 filesystem. The crash was due to the detection of corruption. Upon troubleshooting, the fsck -fn output showed the below corruption [EXTENT_LIST_FREE] Extent list in owner 33080590 claims 230 as the next free chain record, but fsck believes the largest valid value is 227. Clamp the next record value? n The stat output from the debugfs.ocfs2 showed the following corruption where the "Next Free Rec:" had overshot the "Count:" in the root metadata block. Inode: 33080590 Mode: 0640 Generation: 2619713622 (0x9c25a856) FS Generation: 904309833 (0x35e6ac49) CRC32: 00000000 ECC: 0000 Type: Regular Attr: 0x0 Flags: Valid Dynamic Features: (0x16) HasXattr InlineXattr Refcounted Extended Attributes Block: 0 Extended Attributes Inline Size: 256 User: 0 (root) Group: 0 (root) Size: 281320357888 Links: 1 Clusters: 141738 ctime: 0x66911b56 0x316edcb8 -- Fri Jul 12 06:02:30.829349048 2024 atime: 0x66911d6b 0x7f7a28d -- Fri Jul 12 06:11:23.133669517 2024 mtime: 0x66911b56 0x12ed75d7 -- Fri Jul 12 06:02:30.317552087 2024 dtime: 0x0 -- Wed Dec 31 17:00:00 1969 Refcount Block: 2777346 Last Extblk: 2886943 Orphan Slot: 0 Sub Alloc Slot: 0 Sub Alloc Bit: 14 Tree Depth: 1 Count: 227 Next Free Rec: 230 ## Offset Clusters Block# 0 0 2310 2776351 1 2310 2139 2777375 2 4449 1221 2778399 3 5670 731 2779423 4 6401 566 2780447 ....... .... ....... ....... .... ....... The issue was in the reflink workfow while reserving space for inline xattr. The problematic function is ocfs2_reflink_xattr_inline(). By the time this function is called the reflink tree is already recreated at the destination inode from the source inode. At this point, this function reserves space for inline xattrs at the destination inode without even checking if there is space at the root metadata block. It simply reduces the l_c

Affected

51 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.115-1 (bookworm)linux 6.1.115-1 (bookworm)
debianlinux-6.1< linux 6.1.115-1 (bookworm)linux 6.1.115-1 (bookworm)
linuxlinux
linuxlinux
linuxlinux
linuxlinux
linuxlinux
linuxlinux
linuxlinux>= 3.0.87 < 3.13.1
linuxlinux>= 3.10.2 < 3.113.11
linuxlinux>= 3.2.49 < 3.33.3
linuxlinux>= 3.4.54 < 3.53.5
linuxlinux>= 3.9.11 < 3.103.10
linuxlinux>= ef962df057aaafd714f5c22ba3de1be459571fdf < 5c9807c523b4fca81d3e8e864dabc8c8064021215c9807c523b4fca81d3e8e864dabc8c806402121
linuxlinux>= ef962df057aaafd714f5c22ba3de1be459571fdf < 74364cb578dcc0b6c9109519d19cbe5a56afac9a74364cb578dcc0b6c9109519d19cbe5a56afac9a
linuxlinux>= ef962df057aaafd714f5c22ba3de1be459571fdf < aac31d654a0a31cb0d2fa36ae694f4e164a52707aac31d654a0a31cb0d2fa36ae694f4e164a52707
linuxlinux>= ef962df057aaafd714f5c22ba3de1be459571fdf < 020f5c53c17f66c0a8f2d37dad27ace301b8d8a1020f5c53c17f66c0a8f2d37dad27ace301b8d8a1
linuxlinux>= ef962df057aaafd714f5c22ba3de1be459571fdf < 5c2072f02c0d75802ec28ec703b7d43a0dd008b55c2072f02c0d75802ec28ec703b7d43a0dd008b5
linuxlinux>= ef962df057aaafd714f5c22ba3de1be459571fdf < 637c00e06564a945e9d0edb3d78d362d64935f9f637c00e06564a945e9d0edb3d78d362d64935f9f
linuxlinux>= ef962df057aaafd714f5c22ba3de1be459571fdf < 9f9a8f3ac65b4147f1a7b6c05fad5192c0e3c3d99f9a8f3ac65b4147f1a7b6c05fad5192c0e3c3d9
linuxlinux>= ef962df057aaafd714f5c22ba3de1be459571fdf < 96ce4c3537114d1698be635f5e36c62dc49df7a496ce4c3537114d1698be635f5e36c62dc49df7a4
linuxlinux>= ef962df057aaafd714f5c22ba3de1be459571fdf < 5ca60b86f57a4d9648f68418a725b3a7de2816b05ca60b86f57a4d9648f68418a725b3a7de2816b0
linuxlinux_kernel>= 0 < 5.10.234-15.10.234-1
linuxlinux_kernel>= 0 < 6.1.115-16.1.115-1
linuxlinux_kernel>= 0 < 6.11.4-16.11.4-1

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
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