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CVE-2025-40241— erofs: fix crafted invalid cases for encoded extents

CVSS 7.8 · High EPSS 0.14% · P4

Possible ATT&CK Techniques 1AI

T1207 · Rogue Domain Controller

Affected Version Matrix 6

VendorProductVersion RangeStatus
LinuxLinux1d191b4ca51d73699cb127386b95ac152af2b930< 00d8fe0b72f4ca0a983abced36aad2160038c421affected
1d191b4ca51d73699cb127386b95ac152af2b930< a429b76114aaca3ef1aff4cd469dcf025431bd11affected
6.15affected
< 6.15unaffected
6.17.6≤ 6.17.*unaffected
6.18≤ *unaffected
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I. Basic Information for CVE-2025-40241

Vulnerability Information
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Vulnerability Title
erofs: fix crafted invalid cases for encoded extents
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: erofs: fix crafted invalid cases for encoded extents Robert recently reported two corrupted images that can cause system crashes, which are related to the new encoded extents introduced in Linux 6.15: - The first one [1] has plen != 0 (e.g. plen == 0x2000000) but (plen & Z_EROFS_EXTENT_PLEN_MASK) == 0. It is used to represent special extents such as sparse extents (!EROFS_MAP_MAPPED), but previously only plen == 0 was handled; - The second one [2] has pa 0xffffffffffdcffed and plen 0xb4000, then "cur [0xfffffffffffff000] += bvec.bv_len [0x1000]" in "} while ((cur += bvec.bv_len) < end);" wraps around, causing an out-of-bound access of pcl->compressed_bvecs[] in z_erofs_submit_queue(). EROFS only supports 48-bit physical block addresses (up to 1EiB for 4k blocks), so add a sanity check to enforce this.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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，该漏洞源于处理特制无效编码extent时可能导致越界访问。
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 1d191b4ca51d73699cb127386b95ac152af2b930 ~ 00d8fe0b72f4ca0a983abced36aad2160038c421 -
LinuxLinux 6.15 -

II. Public POCs for CVE-2025-40241

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III. Intelligence Information for CVE-2025-40241

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Same Patch Batch · Linux · 2025-12-04 · 53 CVEs total

CVE-2025-402529.8 CRITICALnet: qlogic/qede: fix potential out-of-bounds read in qede_tpa_cont() and qede_tpa_end()
CVE-2025-402619.8 CRITICALnvme: nvme-fc: Ensure ->ioerr_work is cancelled in nvme_fc_delete_ctrl()
CVE-2025-402589.8 CRITICALmptcp: fix race condition in mptcp_schedule_work()
CVE-2025-402579.8 CRITICALmptcp: fix a race in mptcp_pm_del_add_timer()
CVE-2025-402538.8 HIGHs390/ctcm: Fix double-kfree
CVE-2025-402668.2 HIGHKVM: arm64: Check the untrusted offset in FF-A memory share
CVE-2025-402457.8 HIGHnios2: ensure that memblock.current_limit is set when setting pfn limits
CVE-2025-402517.8 HIGHdevlink: rate: Unset parent pointer in devl_rate_nodes_destroy
CVE-2025-402627.8 HIGHInput: imx_sc_key - fix memory corruption on unload
CVE-2025-402507.8 HIGHnet/mlx5: Clean up only new IRQ glue on request_irq() failure
CVE-2025-402487.8 HIGHvsock: Ignore signal/timeout on connect() if already established
CVE-2025-402497.8 HIGHgpio: cdev: make sure the cdev fd is still active before emitting events
CVE-2025-402147.8 HIGHaf_unix: Initialise scc_index in unix_add_edge().
CVE-2025-402447.8 HIGHhfsplus: fix KMSAN uninit-value issue in __hfsplus_ext_cache_extent()
CVE-2025-402437.8 HIGHhfs: fix KMSAN uninit-value issue in hfs_find_set_zero_bits()
CVE-2025-402337.8 HIGHocfs2: clear extent cache after moving/defragmenting extents
CVE-2025-402167.8 HIGHio_uring/rsrc: don't rely on user vaddr alignment
CVE-2025-402157.8 HIGHxfrm: delete x->tunnel as we delete x
CVE-2025-402407.5 HIGHsctp: avoid NULL dereference when chunk data buffer is missing
CVE-2025-402427.0 HIGHgfs2: Fix unlikely race in gdlm_put_lock

Showing top 20 of 53 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40241

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