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CVE-2024-33847— f2fs: compress: don't allow unaligned truncation on released compress inode

EPSS 0.03% · P9
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I. Basic Information for CVE-2024-33847

Vulnerability Information
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Vulnerability Title
f2fs: compress: don't allow unaligned truncation on released compress inode
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: compress: don't allow unaligned truncation on released compress inode f2fs image may be corrupted after below testcase: - mkfs.f2fs -O extra_attr,compression -f /dev/vdb - mount /dev/vdb /mnt/f2fs - touch /mnt/f2fs/file - f2fs_io setflags compression /mnt/f2fs/file - dd if=/dev/zero of=/mnt/f2fs/file bs=4k count=4 - f2fs_io release_cblocks /mnt/f2fs/file - truncate -s 8192 /mnt/f2fs/file - umount /mnt/f2fs - fsck.f2fs /dev/vdb [ASSERT] (fsck_chk_inode_blk:1256) --> ino: 0x5 has i_blocks: 0x00000002, but has 0x3 blocks [FSCK] valid_block_count matching with CP [Fail] [0x4, 0x5] [FSCK] other corrupted bugs [Fail] The reason is: partial truncation assume compressed inode has reserved blocks, after partial truncation, valid block count may change w/o .i_blocks and .total_valid_block_count update, result in corruption. This patch only allow cluster size aligned truncation on released compress inode for fixing.
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，该漏洞源于存在未对齐截断损坏。
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 8e1651cd667cd6779db28314844d88b6de8312a3 ~ b8962cf98595d1ec62f40f23667de830567ec8bc -
LinuxLinux 5.14 -

II. Public POCs for CVE-2024-33847

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III. Intelligence Information for CVE-2024-33847

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Same Patch Batch · Linux · 2024-06-24 · 14 CVEs total

CVE-2024-38384blk-cgroup: fix list corruption from reorder of WRITE ->lqueued
CVE-2024-38664drm: zynqmp_dpsub: Always register bridge
CVE-2024-38663blk-cgroup: fix list corruption from resetting io stat
CVE-2024-38667riscv: prevent pt_regs corruption for secondary idle threads
CVE-2024-39291drm/amdgpu: Fix buffer size in gfx_v9_4_3_init_ cp_compute_microcode() and rlc_microcode()
CVE-2024-39292um: Add winch to winch_handlers before registering winch IRQ
CVE-2024-32936media: ti: j721e-csi2rx: Fix races while restarting DMA
CVE-2024-34027f2fs: compress: fix to cover {reserve,release}_compress_blocks() w/ cp_rwsem lock
CVE-2024-34030PCI: of_property: Return error for int_map allocation failure
CVE-2024-35247fpga: region: add owner module and take its refcount
CVE-2024-36479fpga: bridge: add owner module and take its refcount
CVE-2024-37021fpga: manager: add owner module and take its refcount
CVE-2024-37026drm/xe: Only use reserved BCS instances for usm migrate exec queue

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-33847

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