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.
Vendor | Product | Version | CPE |
---|---|---|---|
linux | linux_kernel | * | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
linux | linux_kernel | * | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
linux | linux_kernel | * | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
linux | linux_kernel | * | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
linux | linux_kernel | * | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
[
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/infiniband/sw/siw/siw_mem.c"
],
"versions": [
{
"version": "2251334dcac9",
"lessThan": "30b9e92d0b5e",
"status": "affected",
"versionType": "git"
},
{
"version": "2251334dcac9",
"lessThan": "608a4b90ece0",
"status": "affected",
"versionType": "git"
},
{
"version": "2251334dcac9",
"lessThan": "3e22b88e02c1",
"status": "affected",
"versionType": "git"
},
{
"version": "2251334dcac9",
"lessThan": "ad9ce7188432",
"status": "affected",
"versionType": "git"
},
{
"version": "2251334dcac9",
"lessThan": "3093ee182f01",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/infiniband/sw/siw/siw_mem.c"
],
"versions": [
{
"version": "5.3",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.3",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.4.119",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.10.37",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.11.21",
"lessThanOrEqual": "5.11.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.12.4",
"lessThanOrEqual": "5.12.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.13",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
]
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