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CVE-2025-40346— arch_topology: Fix incorrect error check in topology_parse_cpu_capacity()

AI Predicted 5.5 Difficulty: Moderate EPSS 0.20% · P10

Affected Version Matrix 16

VendorProductVersion RangeStatus
LinuxLinuxb8fe128dad8f97cc9af7c55a264d1fc5ab677195< 64da320252e43456cc9ec3055ff567f168467b37affected
b8fe128dad8f97cc9af7c55a264d1fc5ab677195< 02fbea0864fd4a863671f5d418129258d7159f68affected
b8fe128dad8f97cc9af7c55a264d1fc5ab677195< a77f8434954cb1e9c42c3854e40855fdcf5ab235affected
b8fe128dad8f97cc9af7c55a264d1fc5ab677195< 3373f263bb647fcc3b5237cfaef757633b9ee25eaffected
b8fe128dad8f97cc9af7c55a264d1fc5ab677195< 45379303124487db3a81219af7565d41f498167faffected
b8fe128dad8f97cc9af7c55a264d1fc5ab677195< 3a01b2614e84361aa222f67bc628593987e5cdb2affected
b8fe128dad8f97cc9af7c55a264d1fc5ab677195< 2eead19334516c8e9927c11b448fbe512b1f18a1affected
5.7affected
… +8 more rows
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I. Basic Information for CVE-2025-40346

Vulnerability Information
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Vulnerability Title
arch_topology: Fix incorrect error check in topology_parse_cpu_capacity()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: arch_topology: Fix incorrect error check in topology_parse_cpu_capacity() Fix incorrect use of PTR_ERR_OR_ZERO() in topology_parse_cpu_capacity() which causes the code to proceed with NULL clock pointers. The current logic uses !PTR_ERR_OR_ZERO(cpu_clk) which evaluates to true for both valid pointers and NULL, leading to potential NULL pointer dereference in clk_get_rate(). Per include/linux/err.h documentation, PTR_ERR_OR_ZERO(ptr) returns: "The error code within @ptr if it is an error pointer; 0 otherwise." This means PTR_ERR_OR_ZERO() returns 0 for both valid pointers AND NULL pointers. Therefore !PTR_ERR_OR_ZERO(cpu_clk) evaluates to true (proceed) when cpu_clk is either valid or NULL, causing clk_get_rate(NULL) to be called when of_clk_get() returns NULL. Replace with !IS_ERR_OR_NULL(cpu_clk) which only proceeds for valid pointers, preventing potential NULL pointer dereference in clk_get_rate().
Source: CVE Program / CVE List V5
CVSS Information
N/A
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，该漏洞源于未正确处理topology_parse_cpu_capacity返回值，可能导致空指针取消引用。
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 b8fe128dad8f97cc9af7c55a264d1fc5ab677195 ~ 64da320252e43456cc9ec3055ff567f168467b37 -
LinuxLinux 5.7 -

II. Public POCs for CVE-2025-40346

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III. Intelligence Information for CVE-2025-40346

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Other References for CVE-2025-40346 (7)

Same Patch Batch · Linux · 2025-12-16 · 157 CVEs total

CVE-2025-403509.8 CRITICALnet/mlx5e: RX, Fix generating skb from non-linear xdp_buff for striding RQ
CVE-2025-682639.8 CRITICALksmbd: ipc: fix use-after-free in ipc_msg_send_request
CVE-2025-683019.8 CRITICALnet: atlantic: fix fragment overflow handling in RX path
CVE-2025-681929.8 CRITICALnet: usb: qmi_wwan: initialize MAC header offset in qmimux_rx_fixup
CVE-2025-682859.8 CRITICALlibceph: fix potential use-after-free in have_mon_and_osd_map()
CVE-2025-682849.8 CRITICALlibceph: prevent potential out-of-bounds writes in handle_auth_session_key()
CVE-2025-683159.8 CRITICALf2fs: fix to detect potential corrupted nid in free_nid_list
CVE-2025-682268.8 HIGHsmb: client: fix incomplete backport in cfids_invalidation_worker()
CVE-2025-683048.8 HIGHBluetooth: hci_core: lookup hci_conn on RX path on protocol side
CVE-2025-682568.8 HIGHstaging: rtl8723bs: fix out-of-bounds read in rtw_get_ie() parser
CVE-2025-403628.8 HIGHceph: fix multifs mds auth caps issue
CVE-2025-682558.8 HIGHstaging: rtl8723bs: fix stack buffer overflow in OnAssocReq IE parsing
CVE-2025-683148.8 HIGHdrm/msm: make sure last_fence is always updated
CVE-2025-682508.2 HIGHhung_task: fix warnings caused by unaligned lock pointers
CVE-2025-682657.8 HIGHnvme: fix admin request_queue lifetime
CVE-2025-682127.8 HIGHfs: Fix uninitialized 'offp' in statmount_string()
CVE-2025-681797.8 HIGHs390: Disable ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
CVE-2025-681817.8 HIGHdrm/radeon: Remove calls to drm_put_dev()
CVE-2025-681837.8 HIGHima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr
CVE-2025-682947.8 HIGHio_uring/net: ensure vectored buffer node import is tied to notification

Showing top 20 of 157 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40346

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