CVE-2024-39467

CVE Details

Release Date:

2024-06-25

Description

In the Linux kernel, the following vulnerability has been resolved:\nf2fs: fix to do sanity check on i_xattr_nid in sanity_check_inode()\nsyzbot reports a kernel bug as below:\nF2FS-fs (loop0): Mounted with checkpoint version = 48b305e4\n==================================================================\nBUG: KASAN: slab-out-of-bounds in f2fs_test_bit fs/f2fs/f2fs.h:2933 [inline]\nBUG: KASAN: slab-out-of-bounds in current_nat_addr fs/f2fs/node.h:213 [inline]\nBUG: KASAN: slab-out-of-bounds in f2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600\nRead of size 1 at addr ffff88807a58c76c by task syz-executor280/5076\nCPU: 1 PID: 5076 Comm: syz-executor280 Not tainted 6.9.0-rc5-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\nCall Trace:\n\n__dump_stack lib/dump_stack.c:88 [inline]\ndump_stack_lvl+0x241/0x360 lib/dump_stack.c:114\nprint_address_description mm/kasan/report.c:377 [inline]\nprint_report+0x169/0x550 mm/kasan/report.c:488\nkasan_report+0x143/0x180 mm/kasan/report.c:601\nf2fs_test_bit fs/f2fs/f2fs.h:2933 [inline]\ncurrent_nat_addr fs/f2fs/node.h:213 [inline]\nf2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600\nf2fs_xattr_fiemap fs/f2fs/data.c:1848 [inline]\nf2fs_fiemap+0x55d/0x1ee0 fs/f2fs/data.c:1925\nioctl_fiemap fs/ioctl.c:220 [inline]\ndo_vfs_ioctl+0x1c07/0x2e50 fs/ioctl.c:838\n__do_sys_ioctl fs/ioctl.c:902 [inline]\n__se_sys_ioctl+0x81/0x170 fs/ioctl.c:890\ndo_syscall_x64 arch/x86/entry/common.c:52 [inline]\ndo_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83\nentry_SYSCALL_64_after_hwframe+0x77/0x7f\nThe root cause is we missed to do sanity check on i_xattr_nid during\nf2fs_iget(), so that in fiemap() path, current_nat_addr() will access\nnat_bitmap w/ offset from invalid i_xattr_nid, result in triggering\nkasan bug report, fix it.

See more information about CVE-2024-39467 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	5.5	CVSS Vector:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	Low
Privileges Required:	Low	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12581	2024-08-12
Oracle Linux version 7 (kernel-uek-container)	ELSA-2024-12585	2024-08-12
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12581	2024-08-12
Oracle Linux version 8 (kernel-uek-container)	ELSA-2024-12584	2024-08-12