Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: RDMA/uverbs: Validate wqe_size before using it in ib_uverbs_post_send ib_uverbs_post_send() uses cmd.wqe_size from userspace without any validation before passing it to kmalloc() and using the allocated buffer as struct ib_uverbs_send_wr. If a user provides a small wqe_size value (e.g., 1), kmalloc() will succeed, but subsequent accesses to user_wr->opcode, user_wr->num_sge, and other fields will read beyond the allocated buffer, resulting in an out-of-bounds read from kernel heap memory. This could potentially leak sensitive kernel information to userspace. Additionally, providing an excessively large wqe_size can trigger a WARNING in the memory allocation path, as reported by syzkaller. This is inconsistent with ib_uverbs_unmarshall_recv() which properly validates that wqe_size >= sizeof(struct ib_uverbs_recv_wr) before proceeding. Add the same validation for ib_uverbs_post_send() to ensure wqe_size is at least sizeof(struct ib_uverbs_send_wr).
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected c3bea3d2dc5358e05541527283279102383b0231 before 9c15ec4cd4e7f57c6bbcb4e73e99290f150dd2a7; affected c3bea3d2dc5358e05541527283279102383b0231 before 9b5ac1c15334d46c0dbd49d64a2257b929500163; affected c3bea3d2dc5358e05541527283279102383b0231 before 01c9b152647dc70dc06a4a2eff86ebb3b3c76075; affected c3bea3d2dc5358e05541527283279102383b0231 before bf1feed1a7886af945f92890493aefd2b5c9928a; affected c3bea3d2dc5358e05541527283279102383b0231 before d533425ac1f2925b4fc3e4ed9b9d72362cb23475; affected c3bea3d2dc5358e05541527283279102383b0231 before bf4454da8b1e712714628c0a0d6e7845bb40790a; affected c3bea3d2dc5358e05541527283279102383b0231 before bef70ff9841990658610512b4a18e4a88c9b4df6; affected c3bea3d2dc5358e05541527283279102383b0231 before 1956f0a74ccf5dc9c3ef717f2985c3ed3400aab0 |
| Linux / Linux | affected 5.0; unaffected 0 before 5.0; unaffected 5.10.252 through 5.10.*; unaffected 5.15.202 through 5.15.*; unaffected 6.1.165 through 6.1.*; unaffected 6.6.128 through 6.6.*; unaffected 6.12.75 through 6.12.*; unaffected 6.18.14 through 6.18.*; unaffected 6.19.4 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/9c15ec4cd4e7f57c6bbcb4e73e99290f150dd2a7
- https://git.kernel.org/stable/c/9b5ac1c15334d46c0dbd49d64a2257b929500163
- https://git.kernel.org/stable/c/01c9b152647dc70dc06a4a2eff86ebb3b3c76075
- https://git.kernel.org/stable/c/bf1feed1a7886af945f92890493aefd2b5c9928a
- https://git.kernel.org/stable/c/d533425ac1f2925b4fc3e4ed9b9d72362cb23475
- https://git.kernel.org/stable/c/bf4454da8b1e712714628c0a0d6e7845bb40790a
- https://git.kernel.org/stable/c/bef70ff9841990658610512b4a18e4a88c9b4df6
- https://git.kernel.org/stable/c/1956f0a74ccf5dc9c3ef717f2985c3ed3400aab0
ADP enrichment
No English description supplied.
No references supplied.