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CVE-2025-38126— net: stmmac: make sure that ptp_rate is not 0 before configuring timestamping

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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stmmac驱动未检查ptp_rate为零的情况，可能导致除零错误。

AI Predicted 5.5 Difficulty: Easy EPSS 0.19% · P9

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 19d857c9038e5c07db8f8cc02b5ad0cd0098714f< 32af9c289234990752281c805500dfe03c5b2b8f affected
19d857c9038e5c07db8f8cc02b5ad0cd0098714f< b263088ee8ab14563817a8be3519af8e25225793 affected
19d857c9038e5c07db8f8cc02b5ad0cd0098714f< bb033c6781ce1b0264c3993b767b4aa9021959c2 affected
19d857c9038e5c07db8f8cc02b5ad0cd0098714f< 379cd990dfe752b38fcf46034698a9a150626c7a affected
19d857c9038e5c07db8f8cc02b5ad0cd0098714f< 030ce919e114a111e83b7976ecb3597cefd33f26 affected
4.5 affected
< 4.5 unaffected
6.1.142≤ 6.1.* unaffected
… +4 more rows
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I. Basic Information for CVE-2025-38126

Vulnerability Information
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Vulnerability Title
net: stmmac: make sure that ptp_rate is not 0 before configuring timestamping
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: stmmac: make sure that ptp_rate is not 0 before configuring timestamping The stmmac platform drivers that do not open-code the clk_ptp_rate value after having retrieved the default one from the device-tree can end up with 0 in clk_ptp_rate (as clk_get_rate can return 0). It will eventually propagate up to PTP initialization when bringing up the interface, leading to a divide by 0: Division by zero in kernel. CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.12.30-00001-g48313bd5768a #22 Hardware name: STM32 (Device Tree Support) Call trace: unwind_backtrace from show_stack+0x18/0x1c show_stack from dump_stack_lvl+0x6c/0x8c dump_stack_lvl from Ldiv0_64+0x8/0x18 Ldiv0_64 from stmmac_init_tstamp_counter+0x190/0x1a4 stmmac_init_tstamp_counter from stmmac_hw_setup+0xc1c/0x111c stmmac_hw_setup from __stmmac_open+0x18c/0x434 __stmmac_open from stmmac_open+0x3c/0xbc stmmac_open from __dev_open+0xf4/0x1ac __dev_open from __dev_change_flags+0x1cc/0x224 __dev_change_flags from dev_change_flags+0x24/0x60 dev_change_flags from ip_auto_config+0x2e8/0x11a0 ip_auto_config from do_one_initcall+0x84/0x33c do_one_initcall from kernel_init_freeable+0x1b8/0x214 kernel_init_freeable from kernel_init+0x24/0x140 kernel_init from ret_from_fork+0x14/0x28 Exception stack(0xe0815fb0 to 0xe0815ff8) Prevent this division by 0 by adding an explicit check and error log about the actual issue. While at it, remove the same check from stmmac_ptp_register, which then becomes duplicate
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stmmac驱动未检查ptp_rate为零的情况，可能导致除零错误。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 19d857c9038e5c07db8f8cc02b5ad0cd0098714f ~ 32af9c289234990752281c805500dfe03c5b2b8f -
Linux Linux 4.5 -

II. Public POCs for CVE-2025-38126

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III. Intelligence Information for CVE-2025-38126

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Same Patch Batch · Linux · 2025-07-03 · 78 CVEs total

CVE-2025-38123 9.8 CRITICAL net: wwan: t7xx: Fix napi rx poll issue
CVE-2025-38139 9.8 CRITICAL netfs: Fix oops in write-retry from mis-resetting the subreq iterator
CVE-2025-38120 9.4 CRITICAL netfilter: nf_set_pipapo_avx2: fix initial map fill
CVE-2025-38146 9.4 CRITICAL net: openvswitch: Fix the dead loop of MPLS parse
CVE-2025-38166 7.8 HIGH bpf: fix ktls panic with sockmap
CVE-2025-38172 7.8 HIGH erofs: avoid using multiple devices with different type
CVE-2025-38106 7.8 HIGH io_uring: fix use-after-free of sq->thread in __io_uring_show_fdinfo()
CVE-2025-38150 7.8 HIGH af_packet: move notifier's packet_dev_mc out of rcu critical section
CVE-2025-38107 7.8 HIGH net_sched: ets: fix a race in ets_qdisc_change()
CVE-2025-38108 7.8 HIGH net_sched: red: fix a race in __red_change()
CVE-2025-38110 7.8 HIGH net/mdiobus: Fix potential out-of-bounds clause 45 read/write access
CVE-2025-38111 7.8 HIGH net/mdiobus: Fix potential out-of-bounds read/write access
CVE-2025-38141 7.8 HIGH dm: fix dm_blk_report_zones
CVE-2025-38116 7.8 HIGH wifi: ath12k: fix uaf in ath12k_core_init()
CVE-2025-38115 7.8 HIGH net_sched: sch_sfq: fix a potential crash on gso_skb handling
CVE-2025-38117 7.8 HIGH Bluetooth: MGMT: Protect mgmt_pending list with its own lock
CVE-2025-38118 7.8 HIGH Bluetooth: MGMT: Fix UAF on mgmt_remove_adv_monitor_complete
CVE-2025-38133 7.8 HIGH iio: adc: ad4851: fix ad4858 chan pointer handling
CVE-2025-38129 7.8 HIGH page_pool: Fix use-after-free in page_pool_recycle_in_ring
CVE-2025-38127 7.8 HIGH ice: fix Tx scheduler error handling in XDP callback

Showing top 20 of 78 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38126

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