In the Linux kernel, the following vulnerability has been resolved:
RDMA/siw: Fix a use after free in siw_alloc_mr Our code analyzer reported a
UAF. In siw_alloc_mr(), it calls siw_mr_add_mem(mr,…). In the
implementation of siw_mr_add_mem(), mem is assigned to mr->mem and then mem
is freed via kfree(mem) if xa_alloc_cyclic() failed. Here, mr->mem still
point to a freed object. After, the execution continue up to the err_out
branch of siw_alloc_mr, and the freed mr->mem is used in
siw_mr_drop_mem(mr). My patch moves “mr->mem = mem” behind the if
(xa_alloc_cyclic(…)<0) {} section, to avoid the uaf.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 20.04 | noarch | linux | < 5.4.0-77.86 | UNKNOWN |
ubuntu | 20.04 | noarch | linux-aws | < 5.4.0-1051.53 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws-5.4 | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-azure | < 5.4.0-1051.53 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-azure-5.4 | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-bluefield | < 5.4.0-1013.16 | UNKNOWN |
ubuntu | 20.04 | noarch | linux-gcp | < 5.4.0-1046.49 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-gcp-5.4 | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-gkeop | < 5.4.0-1018.19 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-hwe-5.4 | < any | UNKNOWN |
git.kernel.org/linus/3093ee182f01689b89e9f8797b321603e5de4f63 (5.13-rc1)
git.kernel.org/stable/c/3093ee182f01689b89e9f8797b321603e5de4f63
git.kernel.org/stable/c/30b9e92d0b5e5d5dc1101ab856c17009537cbca4
git.kernel.org/stable/c/3e22b88e02c194f6c80867abfef5cc09383461f4
git.kernel.org/stable/c/608a4b90ece039940e9425ee2b39c8beff27e00c
git.kernel.org/stable/c/ad9ce7188432650469a6c7625bf479f5ed0b6155
launchpad.net/bugs/cve/CVE-2021-47012
nvd.nist.gov/vuln/detail/CVE-2021-47012
security-tracker.debian.org/tracker/CVE-2021-47012
www.cve.org/CVERecord?id=CVE-2021-47012