r8169: Fix possible ring buffer corruption on fragmented Tx packets.
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.3%
exploitation probability
0.3%top 85% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
r8169: Fix possible ring buffer corruption on fragmented Tx packets.
An issue was found on the RTL8125b when transmitting small fragmented
packets, whereby invalid entries were inserted into the transmit ring
buffer, subsequently leading to calls to dma_unmap_single() with a null
address.
This was caused by rtl8169_start_xmit() not noticing changes to nr_frags
which may occur when small packets are padded (to work around hardware
quirks) in rtl8169_tso_csum_v2().
To fix this, postpone inspecting nr_frags until after any padding has been
applied.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/078d5b7500d70af2de6b38e226b03f0b932026a6https://git.kernel.org/stable/c/0c48185a95309556725f818b82120bb74e9c627dhttps://git.kernel.org/stable/c/54e7a0d111240c92c0f02ceba6eb8f26bf6d6479https://git.kernel.org/stable/c/61c1c98e2607120ce9c3fa1bf75e6da909712b27https://git.kernel.org/stable/c/68222d7b4b72aa321135cd453dac37f00ec41fd1https://git.kernel.org/stable/c/b6d21cf40de103d63ae78551098a7c06af8c98ddhttps://git.kernel.org/stable/c/c71e3a5cffd5309d7f84444df03d5b72600cc417