Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/uverbs: Prevent integer overflow issue In the expression "cmd.wqe_size * cmd.wr_count", both variables are u32 values that come from the user so the multiplication can lead to integer wrapping. Then we pass the result to uverbs_request_next_ptr() which also could potentially wrap. The "cmd.sge_count * sizeof(struct ib_uverbs_sge)" multiplication can also overflow on 32bit systems although it's fine on 64bit systems. This patch does two things. First, I've re-arranged the condition in uverbs_request_next_ptr() so that the use controlled variable "len" is on one side of the comparison by itself without any math. Then I've modified all the callers to use size_mul() for the multiplications.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
67cdb40ca444c09853ab4d8a41cf547ac26a4de4 to < c57721b24bd897338a81a0ca5fff41600f0f1ad1affected67cdb40ca444c09853ab4d8a41cf547ac26a4de4 to < 42a6eb4ed7a9a41ba0b83eb0c7e0225b5fca5608affected67cdb40ca444c09853ab4d8a41cf547ac26a4de4 to < c2f961c46ea0e5274c5c320d007c2dd949cf627aaffected67cdb40ca444c09853ab4d8a41cf547ac26a4de4 to < 346db03e9926ab7117ed9bf19665699c037c773caffected67cdb40ca444c09853ab4d8a41cf547ac26a4de4 to < b92667f755749cf10d9ef1088865c555ae83ffb7affected67cdb40ca444c09853ab4d8a41cf547ac26a4de4 to < b3ef4ae713360501182695dd47d6b4f6e1a43eb8affected67cdb40ca444c09853ab4d8a41cf547ac26a4de4 to < d0257e089d1bbd35c69b6c97ff73e3690ab149a9affected
Linux Linux
Default version status: affected
2.6.15affected0 to < 2.6.15unaffected5.4.289 to ≤ 5.4.*unaffected5.10.233 to ≤ 5.10.*unaffected5.15.176 to ≤ 5.15.*unaffected6.1.124 to ≤ 6.1.*unaffected6.6.70 to ≤ 6.6.*unaffected6.12.9 to ≤ 6.12.*unaffected6.13 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/c57721b24bd897338a81a0ca5fff41600f0f1ad1 ↗
- https://git.kernel.org/stable/c/42a6eb4ed7a9a41ba0b83eb0c7e0225b5fca5608 ↗
- https://git.kernel.org/stable/c/c2f961c46ea0e5274c5c320d007c2dd949cf627a ↗
- https://git.kernel.org/stable/c/346db03e9926ab7117ed9bf19665699c037c773c ↗
- https://git.kernel.org/stable/c/b92667f755749cf10d9ef1088865c555ae83ffb7 ↗
- https://git.kernel.org/stable/c/b3ef4ae713360501182695dd47d6b4f6e1a43eb8 ↗
- https://git.kernel.org/stable/c/d0257e089d1bbd35c69b6c97ff73e3690ab149a9 ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html ↗