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CVE-2025-38579— f2fs: fix KMSAN uninit-value in extent_info usage

EPSS 0.03% · P8

Affected Version Matrix 16

VendorProductVersion RangeStatus
LinuxLinux94afd6d6e5253179c9b891d02081cc8355a11768< 08e8ab00a6d20d5544c932ee85a297d833895141affected
94afd6d6e5253179c9b891d02081cc8355a11768< e68b751ec2b15d866967812c57cfdfc1eba6a269affected
94afd6d6e5253179c9b891d02081cc8355a11768< dabfa3952c8e6bfe6414dbf32e8b6c5f349dc898affected
94afd6d6e5253179c9b891d02081cc8355a11768< 44a79437309e0ee2276ac17aaedc71253af253a8affected
94afd6d6e5253179c9b891d02081cc8355a11768< cc1615d5aba4f396cf412579928539a2b124c8a0affected
94afd6d6e5253179c9b891d02081cc8355a11768< 01b6f5955e0008af6bc3a181310d2744bb349800affected
94afd6d6e5253179c9b891d02081cc8355a11768< 154467f4ad033473e5c903a03e7b9bca7df9a0faaffected
5.15affected
… +8 more rows
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I. Basic Information for CVE-2025-38579

Vulnerability Information
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Vulnerability Title
f2fs: fix KMSAN uninit-value in extent_info usage
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix KMSAN uninit-value in extent_info usage KMSAN reported a use of uninitialized value in `__is_extent_mergeable()` and `__is_back_mergeable()` via the read extent tree path. The root cause is that `get_read_extent_info()` only initializes three fields (`fofs`, `blk`, `len`) of `struct extent_info`, leaving the remaining fields uninitialized. This leads to undefined behavior when those fields are accessed later, especially during extent merging. Fix it by zero-initializing the `extent_info` struct before population.
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extent_info使用中存在未初始化值，可能导致未定义行为。
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 94afd6d6e5253179c9b891d02081cc8355a11768 ~ 08e8ab00a6d20d5544c932ee85a297d833895141 -
LinuxLinux 5.15 -

II. Public POCs for CVE-2025-38579

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III. Intelligence Information for CVE-2025-38579

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Same Patch Batch · Linux · 2025-08-19 · 60 CVEs total

CVE-2025-38594iommu/vt-d: Fix UAF on sva unbind with pending IOPFs
CVE-2025-38614eventpoll: Fix semi-unbounded recursion
CVE-2025-38610powercap: dtpm_cpu: Fix NULL pointer dereference in get_pd_power_uw()
CVE-2025-38609PM / devfreq: Check governor before using governor->name
CVE-2025-38608bpf, ktls: Fix data corruption when using bpf_msg_pop_data() in ktls
CVE-2025-38612staging: fbtft: fix potential memory leak in fbtft_framebuffer_alloc()
CVE-2025-38598drm/amdgpu: fix use-after-free in amdgpu_userq_suspend+0x51a/0x5a0
CVE-2025-38597drm/rockchip: vop2: fail cleanly if missing a primary plane for a video-port
CVE-2025-38595xen: fix UAF in dmabuf_exp_from_pages()
CVE-2025-38596drm/panthor: Fix UAF in panthor_gem_create_with_handle() debugfs code
CVE-2025-38599wifi: mt76: mt7996: Fix possible OOB access in mt7996_tx()
CVE-2025-38593Bluetooth: hci_sync: fix double free in 'hci_discovery_filter_clear()'
CVE-2025-38592Bluetooth: hci_devcd_dump: fix out-of-bounds via dev_coredumpv
CVE-2025-38591bpf: Reject narrower access to pointer ctx fields
CVE-2025-38590net/mlx5e: Remove skb secpath if xfrm state is not found
CVE-2025-38589neighbour: Fix null-ptr-deref in neigh_flush_dev().
CVE-2025-38588ipv6: prevent infinite loop in rt6_nlmsg_size()
CVE-2025-38587ipv6: fix possible infinite loop in fib6_info_uses_dev()
CVE-2025-38586bpf, arm64: Fix fp initialization for exception boundary
CVE-2025-38585staging: media: atomisp: Fix stack buffer overflow in gmin_get_var_int()

Showing top 20 of 60 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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