CVE-2024-46794

x86/tdx: Fix data leak in mmio_read()

EPSS 0.2%

Vexday Risk Score

3Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

18 set 2024Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

In the Linux kernel, the following vulnerability has been resolved: x86/tdx: Fix data leak in mmio_read() The mmio_read() function makes a TDVMCALL to retrieve MMIO data for an address from the VMM. Sean noticed that mmio_read() unintentionally exposes the value of an initialized variable (val) on the stack to the VMM. This variable is only needed as an output value. It did not need to be passed to the VMM in the first place. Do not send the original value of *val to the VMM. [ dhansen: clarify what 'val' is used for. ]

Produtos afetados

Linux · Linux

Referências

https://git.kernel.org/stable/c/26c6af49d26ffc377e392e30d4086db19eed0ef7 https://git.kernel.org/stable/c/b55ce742afcb8e8189d82f2f1e635ba1b5a461fa https://git.kernel.org/stable/c/b6fb565a2d15277896583d471b21bc14a0c99661 https://git.kernel.org/stable/c/ef00818c50cf55a3a56bd9a9fae867c92dfb84e7 https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html