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CVE-2025-37875— igc: fix PTM cycle trigger logic

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igc驱动PTM周期触发逻辑错误，可能导致PTM操作不可靠。

AI Predicted 5.3 Difficulty: Easy EPSS 0.27% · P18

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux a90ec84837325df4b9a6798c2cc0df202b5680bd< c1f174edaccc5a00f8e218c42a0aa9156efd5f76 affected
a90ec84837325df4b9a6798c2cc0df202b5680bd< 0c03e4fbe1321697d9d04587e21e416705e1b19f affected
a90ec84837325df4b9a6798c2cc0df202b5680bd< 16194ca3f3b4448a062650c869a7b3b206c6f5d3 affected
a90ec84837325df4b9a6798c2cc0df202b5680bd< f3516229cd12dcd45f23ed01adab17e8772b1bd5 affected
a90ec84837325df4b9a6798c2cc0df202b5680bd< 31959e06143692f7e02b8eef7d7d6ac645637906 affected
a90ec84837325df4b9a6798c2cc0df202b5680bd< 8e404ad95d2c10c261e2ef6992c7c12dde03df0e affected
5.15 affected
< 5.15 unaffected
… +6 more rows
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I. Basic Information for CVE-2025-37875

Vulnerability Information
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Vulnerability Title
igc: fix PTM cycle trigger logic
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: igc: fix PTM cycle trigger logic Writing to clear the PTM status 'valid' bit while the PTM cycle is triggered results in unreliable PTM operation. To fix this, clear the PTM 'trigger' and status after each PTM transaction. The issue can be reproduced with the following: $ sudo phc2sys -R 1000 -O 0 -i tsn0 -m Note: 1000 Hz (-R 1000) is unrealistically large, but provides a way to quickly reproduce the issue. PHC2SYS exits with: "ioctl PTP_OFFSET_PRECISE: Connection timed out" when the PTM transaction fails This patch also fixes a hang in igc_probe() when loading the igc driver in the kdump kernel on systems supporting PTM. The igc driver running in the base kernel enables PTM trigger in igc_probe(). Therefore the driver is always in PTM trigger mode, except in brief periods when manually triggering a PTM cycle. When a crash occurs, the NIC is reset while PTM trigger is enabled. Due to a hardware problem, the NIC is subsequently in a bad busmaster state and doesn't handle register reads/writes. When running igc_probe() in the kdump kernel, the first register access to a NIC register hangs driver probing and ultimately breaks kdump. With this patch, igc has PTM trigger disabled most of the time, and the trigger is only enabled for very brief (10 - 100 us) periods when manually triggering a PTM cycle. Chances that a crash occurs during a PTM trigger are not 0, but extremely reduced.
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igc驱动PTM周期触发逻辑错误，可能导致PTM操作不可靠。
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 a90ec84837325df4b9a6798c2cc0df202b5680bd ~ c1f174edaccc5a00f8e218c42a0aa9156efd5f76 -
Linux Linux 5.15 -

II. Public POCs for CVE-2025-37875

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III. Intelligence Information for CVE-2025-37875

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

CVE-2025-37879 9.8 CRITICAL 9p/net: fix improper handling of bogus negative read/write replies
CVE-2025-37885 8.8 HIGH KVM: x86: Reset IRTE to host control if *new* route isn't postable
CVE-2025-37849 8.8 HIGH KVM: arm64: Tear down vGIC on failed vCPU creation
CVE-2025-37856 7.8 HIGH btrfs: harden block_group::bg_list against list_del() races
CVE-2025-37886 7.8 HIGH pds_core: make wait_context part of q_info
CVE-2025-37869 7.8 HIGH drm/xe: Use local fence in error path of xe_migrate_clear
CVE-2025-37854 7.8 HIGH drm/amdkfd: Fix mode1 reset crash issue
CVE-2025-37845 7.8 HIGH tracing: fprobe events: Fix possible UAF on modules
CVE-2025-37882 7.8 HIGH usb: xhci: Fix isochronous Ring Underrun/Overrun event handling
CVE-2025-37861 7.8 HIGH scsi: mpi3mr: Synchronous access b/w reset and tm thread for reply queue
CVE-2025-37873 7.8 HIGH eth: bnxt: fix missing ring index trim on error path
CVE-2025-37871 7.5 HIGH nfsd: decrease sc_count directly if fail to queue dl_recall
CVE-2025-37887 7.1 HIGH pds_core: handle unsupported PDS_CORE_CMD_FW_CONTROL result
CVE-2025-37876 7.0 HIGH netfs: Only create /proc/fs/netfs with CONFIG_PROC_FS
CVE-2025-37888 net/mlx5: Fix null-ptr-deref in mlx5_create_{inner_,}ttc_table()
CVE-2025-37878 perf/core: Fix WARN_ON(!ctx) in __free_event() for partial init
CVE-2025-37872 net: txgbe: fix memory leak in txgbe_probe() error path
CVE-2025-37870 drm/amd/display: prevent hang on link training fail
CVE-2025-37868 drm/xe/userptr: fix notifier vs folio deadlock
CVE-2025-37867 RDMA/core: Silence oversized kvmalloc() warning

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-37875

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