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CVE-2025-38415— Squashfs: check return result of sb_min_blocksize

EPSS 0.03% · P10
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I. Basic Information for CVE-2025-38415

Vulnerability Information
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Vulnerability Title
Squashfs: check return result of sb_min_blocksize
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Squashfs: check return result of sb_min_blocksize Syzkaller reports an "UBSAN: shift-out-of-bounds in squashfs_bio_read" bug. Syzkaller forks multiple processes which after mounting the Squashfs filesystem, issues an ioctl("/dev/loop0", LOOP_SET_BLOCK_SIZE, 0x8000). Now if this ioctl occurs at the same time another process is in the process of mounting a Squashfs filesystem on /dev/loop0, the failure occurs. When this happens the following code in squashfs_fill_super() fails. ---- msblk->devblksize = sb_min_blocksize(sb, SQUASHFS_DEVBLK_SIZE); msblk->devblksize_log2 = ffz(~msblk->devblksize); ---- sb_min_blocksize() returns 0, which means msblk->devblksize is set to 0. As a result, ffz(~msblk->devblksize) returns 64, and msblk->devblksize_log2 is set to 64. This subsequently causes the UBSAN: shift-out-of-bounds in fs/squashfs/block.c:195:36 shift exponent 64 is too large for 64-bit type 'u64' (aka 'unsigned long long') This commit adds a check for a 0 return by sb_min_blocksize().
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Squashfs模块未检查sb_min_blocksize返回值，可能导致移位越界。
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 0aa666190509ffab81c202c5095a166be23961ac ~ db7096ea160e40d78c67fce52e7cc51bde049497 -
LinuxLinux 2.6.29 -

II. Public POCs for CVE-2025-38415

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III. Intelligence Information for CVE-2025-38415

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Same Patch Batch · Linux · 2025-07-25 · 114 CVEs total

CVE-2025-38426drm/amdgpu: Add basic validation for RAS header
CVE-2025-38440net/mlx5e: Fix race between DIM disable and net_dim()
CVE-2025-38438ASoC: SOF: Intel: hda: Use devm_kstrdup() to avoid memleak.
CVE-2025-38437ksmbd: fix potential use-after-free in oplock/lease break ack
CVE-2025-38436drm/scheduler: signal scheduled fence when kill job
CVE-2025-38435riscv: vector: Fix context save/restore with xtheadvector
CVE-2025-38434Revert "riscv: Define TASK_SIZE_MAX for __access_ok()"
CVE-2025-38433riscv: fix runtime constant support for nommu kernels
CVE-2025-38432net: netpoll: Initialize UDP checksum field before checksumming
CVE-2025-38431smb: client: fix regression with native SMB symlinks
CVE-2025-38430nfsd: nfsd4_spo_must_allow() must check this is a v4 compound request
CVE-2025-38429bus: mhi: ep: Update read pointer only after buffer is written
CVE-2025-38428Input: ims-pcu - check record size in ims_pcu_flash_firmware()
CVE-2025-38427video: screen_info: Relocate framebuffers behind PCI bridges
CVE-2025-38425i2c: tegra: check msg length in SMBUS block read
CVE-2025-38413virtio-net: xsk: rx: fix the frame's length check
CVE-2025-38417ice: fix eswitch code memory leak in reset scenario
CVE-2025-38416NFC: nci: uart: Set tty->disc_data only in success path
CVE-2025-38414wifi: ath12k: fix GCC_GCC_PCIE_HOT_RST definition for WCN7850
CVE-2025-38418remoteproc: core: Release rproc->clean_table after rproc_attach() fails

Showing top 20 of 114 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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