Bug 2356629 (CVE-2025-21894) - CVE-2025-21894 kernel: net: enetc: VFs do not support HWTSTAMP_TX_ONESTEP_SYNC
Summary: CVE-2025-21894 kernel: net: enetc: VFs do not support HWTSTAMP_TX_ONESTEP_SYNC
Keywords:
Status: NEW
Alias: CVE-2025-21894
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-04-01 16:03 UTC by OSIDB Bzimport
Modified: 2025-04-02 04:51 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Description OSIDB Bzimport 2025-04-01 16:03:21 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: enetc: VFs do not support HWTSTAMP_TX_ONESTEP_SYNC

Actually ENETC VFs do not support HWTSTAMP_TX_ONESTEP_SYNC because only
ENETC PF can access PMa_SINGLE_STEP registers. And there will be a crash
if VFs are used to test one-step timestamp, the crash log as follows.

[  129.110909] Unable to handle kernel paging request at virtual address 00000000000080c0
[  129.287769] Call trace:
[  129.290219]  enetc_port_mac_wr+0x30/0xec (P)
[  129.294504]  enetc_start_xmit+0xda4/0xe74
[  129.298525]  enetc_xmit+0x70/0xec
[  129.301848]  dev_hard_start_xmit+0x98/0x118
Comment 1 Robb Gatica 2025-04-02 02:12:12 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025040130-CVE-2025-21894-60f0@gregkh/T
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