Description · from the CVE record
In the Linux kernel, the following vulnerability has been resolved:
net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG
On the packet reception path, the ID of the MAC Port on which the packet
was received, is embedded in the RX DMA Descriptor's metadata. The ID is
extracted using the helper function cppi5_desc_get_tags_ids() which fills
in the 16-bit Source Tag into the 'port_id' variable. However, it is only
the lower 8-bits of the 16-bit Source Tag that represent the MAC Port ID,
while the upper 8-bits are Hardware-Reserved and carry an arbitrary value.
With the existing logic, sporadic kernel crash is observed due to the
subsequent driver code accessing out-of-bound memory because of an invalid
port_id.
Hence, fix the port_id extraction logic to use only the lower 8-bits of the
Source Tag as the MAC Port ID.
Affected
ProductAffectedFixed inSource
Linux93a76530316a3d8cc2d82c3deca48424fee92100 – < 14fc40bf28390e0ebee6a072457c36b82c61410014fc40bf28390e0ebee6a072457c36b82c614100CNA
Linux93a76530316a3d8cc2d82c3deca48424fee92100 – < 1c0e35ce761131f82062222779d85748497908921c0e35ce761131f82062222779d8574849790892CNA
Linux93a76530316a3d8cc2d82c3deca48424fee92100 – < 9a220225efd6f58350bbb53fe70bdec08519267f9a220225efd6f58350bbb53fe70bdec08519267fCNA
Linux93a76530316a3d8cc2d82c3deca48424fee92100 – < 551688b410d3fb0dae7739724422f268cd9446d6551688b410d3fb0dae7739724422f268cd9446d6CNA
Linux93a76530316a3d8cc2d82c3deca48424fee92100 – < 46a8e084a159e638ac2728e96980b65d752d65fd46a8e084a159e638ac2728e96980b65d752d65fdCNA
Linux93a76530316a3d8cc2d82c3deca48424fee92100 – < 72e4e3d7efc3b7d85f86abbe8b94f8e45074abe372e4e3d7efc3b7d85f86abbe8b94f8e45074abe3CNA
Linux93a76530316a3d8cc2d82c3deca48424fee92100 – < 914e0100df3435bd14d09f397238e891cf9b7dce914e0100df3435bd14d09f397238e891cf9b7dceCNA
Linux93a76530316a3d8cc2d82c3deca48424fee92100 – < 36a05d2820077bb3955acb8111e1041d3914803736a05d2820077bb3955acb8111e1041d39148037CNA
Linux5.75.10.266CNA
by Kastro