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CVE-2025-37858— fs/jfs: Prevent integer overflow in AG size calculation

EPSS 0.03% · P9
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I. Basic Information for CVE-2025-37858

Vulnerability Information
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Vulnerability Title
fs/jfs: Prevent integer overflow in AG size calculation
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fs/jfs: Prevent integer overflow in AG size calculation The JFS filesystem calculates allocation group (AG) size using 1 << l2agsize in dbExtendFS(). When l2agsize exceeds 31 (possible with >2TB aggregates on 32-bit systems), this 32-bit shift operation causes undefined behavior and improper AG sizing. On 32-bit architectures: - Left-shifting 1 by 32+ bits results in 0 due to integer overflow - This creates invalid AG sizes (0 or garbage values) in sbi->bmap->db_agsize - Subsequent block allocations would reference invalid AG structures - Could lead to: - Filesystem corruption during extend operations - Kernel crashes due to invalid memory accesses - Security vulnerabilities via malformed on-disk structures Fix by casting to s64 before shifting: bmp->db_agsize = (s64)1 << l2agsize; This ensures 64-bit arithmetic even on 32-bit architectures. The cast matches the data type of db_agsize (s64) and follows similar patterns in JFS block calculation code. Found by Linux Verification Center (linuxtesting.org) with SVACE.
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jfs文件系统AG大小计算存在整数溢出，可能导致文件系统损坏。
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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ dd07a985e2ded47b6c7d69fc93c1fe02977c8454 -
LinuxLinux 2.6.12 -

II. Public POCs for CVE-2025-37858

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III. Intelligence Information for CVE-2025-37858

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Same Patch Batch · Linux · 2025-05-09 · 52 CVEs total

CVE-2025-37874net: ngbe: fix memory leak in ngbe_probe() error path
CVE-2025-37889ASoC: ops: Consistently treat platform_max as control value
CVE-2025-37888net/mlx5: Fix null-ptr-deref in mlx5_create_{inner_,}ttc_table()
CVE-2025-37883s390/sclp: Add check for get_zeroed_page()
CVE-2025-37886pds_core: make wait_context part of q_info
CVE-2025-37885KVM: x86: Reset IRTE to host control if *new* route isn't postable
CVE-2025-37884bpf: Fix deadlock between rcu_tasks_trace and event_mutex.
CVE-2025-37887pds_core: handle unsupported PDS_CORE_CMD_FW_CONTROL result
CVE-2025-37876netfs: Only create /proc/fs/netfs with CONFIG_PROC_FS
CVE-2025-37875igc: fix PTM cycle trigger logic
CVE-2025-37877iommu: Clear iommu-dma ops on cleanup
CVE-2025-37873eth: bnxt: fix missing ring index trim on error path
CVE-2025-37872net: txgbe: fix memory leak in txgbe_probe() error path
CVE-2025-37871nfsd: decrease sc_count directly if fail to queue dl_recall
CVE-2025-37870drm/amd/display: prevent hang on link training fail
CVE-2025-37869drm/xe: Use local fence in error path of xe_migrate_clear
CVE-2025-37868drm/xe/userptr: fix notifier vs folio deadlock
CVE-2025-37867RDMA/core: Silence oversized kvmalloc() warning
CVE-2025-37866mlxbf-bootctl: use sysfs_emit_at() in secure_boot_fuse_state_show()
CVE-2025-37865net: dsa: mv88e6xxx: fix -ENOENT when deleting VLANs and MST is unsupported

Showing top 20 of 52 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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