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CVE-2026-90056— net: fec: only stop PTP if it was initialized

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.

在 Linux 内核中，已修复以下漏洞： 网络：FEC：仅在 PTP 已初始化的情况下才停止 PTP 函数仅在 可用时才会被调用。 然而， 函数在 路径中会无条件地调用 ，同时 函数在设备移除过程中也会无条件地调用 。 为避免在 PTP 未初始化的情况下错误地停止 PTP，应在上述两条路径中先检查 ，再决定是否调用 。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1087 · Account Discovery

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 32cba57ba74be58589aeb4cb6496183e46a5e3e5< 0dc8b3a395c3a749ab62c078f2fd54a402ae7e2b affected
32cba57ba74be58589aeb4cb6496183e46a5e3e5< 1973f108c481fab9bdc7daa6c77442af4a7388ab affected
32cba57ba74be58589aeb4cb6496183e46a5e3e5< 0602a4c238d2b6ed6e2bf5fa8ef7fa0203883dac affected
32cba57ba74be58589aeb4cb6496183e46a5e3e5< 7566789664813c1778f0d4b7e0539fd863ea450c affected
32cba57ba74be58589aeb4cb6496183e46a5e3e5< 383f699a86fd04458dc47d10578c17e94f63d92f affected
32cba57ba74be58589aeb4cb6496183e46a5e3e5< 1f9639caeece703012bdb23975ebedf70f426269 affected
32cba57ba74be58589aeb4cb6496183e46a5e3e5< 5975009651c4e5ec1492612962d0dd3dc86f6bda affected
32cba57ba74be58589aeb4cb6496183e46a5e3e5< dd890ae29299636fb037276fc1b5238698d08b03 affected
… +12 more rows
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I. Basic Information for CVE-2026-90056

Vulnerability Information
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Vulnerability Title
net: fec: only stop PTP if it was initialized
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: fec: only stop PTP if it was initialized fec_ptp_init() is only called when fep->bufdesc_ex is available. However, fec_probe() unconditionally calls fec_ptp_stop() on the failed_init path, and fec_drv_remove() unconditionally calls fec_ptp_stop() during device removal. Check fep->bufdesc_ex before calling fec_ptp_stop() in both paths to avoid stopping PTP when it was not initialized.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 32cba57ba74be58589aeb4cb6496183e46a5e3e5 ~ 0dc8b3a395c3a749ab62c078f2fd54a402ae7e2b -
Linux Linux 4.2 -

II. Public POCs for CVE-2026-90056

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III. Intelligence Information for CVE-2026-90056

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Patches & Fixes for CVE-2026-90056 (8)

Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total

CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
CVE-2026-90110 9.4 CRITICAL inetpeer: randomize RB-tree node comparison using SipHash
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-90162 8.8 HIGH ksmbd: defer publishing granted locks to prevent UAF/double-free race
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90371 8.8 HIGH wifi: mt76: fix RXDMAD_C buffer recycling race
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID
CVE-2026-90240 8.8 HIGH iommu/vt-d: Flush context cache with correct SID when tearing down aliases
CVE-2026-90379 8.8 HIGH wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind

Showing top 20 of 600 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-90056

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