In the Linux kernel, the following vulnerability has been resolved:
net: stmmac: fix oops when split header is enabled
For GMAC4, when split header is enabled, in some rare cases, the
hardware does not fill buf2 of the first descriptor with payload.
Thus we cannot assume buf2 is always fully filled if it is not
the last descriptor. Otherwise, the length of buf2 of the second
descriptor will be calculated wrong and cause an oops:
Unable to handle kernel paging request at virtual address ffff00019246bfc0
...
x2 : 0000000000000040 x1 : ffff00019246bfc0 x0 : ffff00009246c000
Call trace:
dcache_inval_poc+0x28/0x58 (P)
dma_direct_sync_single_for_cpu+0x38/0x6c
__dma_sync_single_for_cpu+0x34/0x6c
stmmac_napi_poll_rx+0x8f0/0xb60
__napi_poll.constprop.0+0x30/0x144
net_rx_action+0x160/0x274
handle_softirqs+0x1b8/0x1fc
...
To fix this, the PL bit-field in RDES3 register is used for all
descriptors, whether it is the last descriptor or not.
References
Configurations
Configuration 1 (hide)
|
History
24 Jun 2026, 17:09
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/36f81cb7d82e9614a7058da6abdf2e3a03993df1 - Patch | |
| References | () https://git.kernel.org/stable/c/b1f23df09e7dbf4c86b6908dff7efb8cb2b7d609 - Patch | |
| References | () https://git.kernel.org/stable/c/babab1b42ed68877ef669a08384becf281ad2582 - Patch | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CWE | NVD-CWE-noinfo | |
| First Time |
Linux linux Kernel
Linux |
27 May 2026, 14:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-27 14:17
Updated : 2026-06-24 17:09
NVD link : CVE-2026-45940
Mitre link : CVE-2026-45940
CVE.ORG link : CVE-2026-45940
JSON object : View
Products Affected
linux
- linux_kernel
CWE