usb: class: cdc-wdm: fix reordering issue in read code path
3Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackepss 0.1%
probabilidade de exploração
0.1%top 97% das CVEs
exploração observada
nãonenhuma fonte reporta
In the Linux kernel, the following vulnerability has been resolved:
usb: class: cdc-wdm: fix reordering issue in read code path
Quoting the bug report:
Due to compiler optimization or CPU out-of-order execution, the
desc->length update can be reordered before the memmove. If this
happens, wdm_read() can see the new length and call copy_to_user() on
uninitialized memory. This also violates LKMM data race rules [1].
Fix it by using WRITE_ONCE and memory barriers.
Produtos afetados
Linux · LinuxReferências
https://git.kernel.org/stable/c/170e8daca24da6edb4be82ab01abf44e87af387bhttps://git.kernel.org/stable/c/276aef0fd2b92f41b920ac891c72cadeee957934https://git.kernel.org/stable/c/4ee3062bf2c9a722afef429826e8607eaf3fc6a0https://git.kernel.org/stable/c/638328ca9c17ae6511ad62198c57bae32ffa3c91https://git.kernel.org/stable/c/67ed312124bb1b61858778ac0b985b48961c862ahttps://git.kernel.org/stable/c/8df672bfe3ec2268c2636584202755898e547173https://git.kernel.org/stable/c/c8fa96ed021923dae147bcd9f9205b8df7b82360https://git.kernel.org/stable/c/e3c874b05901dc519054b5107d16620e6d2b5fea