RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access mr_check_range() validates that [iova, iova+length) falls within the registered MR range using wraparound-prone arithmetic: if (iova < mr->ibmr.iova || iova + length > mr->ibmr.iova + mr->ibmr.length) A remote peer can craft an RDMA-Write/Read RETH so that iova + length wraps to 0 (e.g. iova=0xfffffffffffffff8, length=8), bypassing the check. rxe_mr_iova_to_index() then computes a huge index (int idx, only guarded by WARN_ON) and rxe_mr_copy_xarray() dereferences mr->page_info[huge], causing an out-of-bounds read/write and a kernel oops that is triggerable by an unauthenticated remote peer. Rewrite the check in overflow-safe form; the first two clauses guarantee that the subsequent subtractions do not underflow: if (iova < mr->ibmr.iova || length > mr->ibmr.length || iova - mr->ibmr.iova > mr->ibmr.length - length) With the fix, mr_check_range() returns -EINVAL for the crafted iova and the responder reports REMOTE_ACCESS_ERROR instead of triggering the OOB.
CVE-2026-98365
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98365
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
"lessThan": "b7d2118660545a00b21e83010ded1a231c6fb8c5",
"versionType": "git"
},
{
"status": "affected",
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
"lessThan": "5d9426a74fc8cb8f375fcdc19b465a030f9b8cab",
"versionType": "git"
},
{
"status": "affected",
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
"lessThan": "2f3b705144e3a3c14184fec6e354680081fe91ec",
"versionType": "git"
},
{
"status": "affected",
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
"lessThan": "3431f525718f6b07da308cda6d44f8cb548bbd37",
"versionType": "git"
},
{
"status": "affected",
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
"lessThan": "d10e2a08799e858d3e71ea4169bcd018f216d444",
"versionType": "git"
}
],
"programFiles": [
"drivers/infiniband/sw/rxe/rxe_mr.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/infiniband/sw/rxe/rxe_mr.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98365
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #38443 · Revision 1
- Added to Heist Feed
- Publisher date