CVE-2026-52908
RDMA: During rereg_mr ensure that REREG_ACCESS is compatible
Description
In the Linux kernel, the following vulnerability has been resolved: RDMA: During rereg_mr ensure that REREG_ACCESS is compatible If IB_MR_REREG_ACCESS changes from RO to RW then the umem has to be re-evaluated to ensure it is properly pinned as RW. Since the umem is hidden inside each driver's mr struct add a ib_umem_check_rereg() function that each driver has to call before processing IB_MR_REREG_ACCESS. mlx4 has to retain its duplicate ib_access_writable check because it implements IB_MR_REREG_ACCESS | IB_MR_REREG_TRANS by changing both items in place sequentially while the MR is live, so it will continue to not support this combination.
INFO
Published Date :
June 19, 2026, 3:16 p.m.
Last Modified :
July 8, 2026, 3:24 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Apply the RDMA fix to the Linux kernel.
- Ensure REREG_ACCESS compatibility in drivers.
- Update IB_MR_REREG_ACCESS flags as needed.
- Retain mlx4-specific checks if applicable.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-52908.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-52908 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-52908
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-52908 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-52908 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 08, 2026
Action Type Old Value New Value Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.143 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.36 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.94 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.13 *cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:* Added Reference Type kernel.org: https://git.kernel.org/stable/c/09dc18894148381d3bfc550083b1236043870dce Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2904e985a2917b5dac65df82733065e78a65fc9d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/50334a05a950840b39a1ce3d2a173b4183db9b3e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/badad6fad60def1b9805559dd81dbab3d97b82aa Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/eba5df21eda0fe7418efbea2f799f8ea1b8ca94c Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 28, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 19, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'b40656aa7d559adc1fe689396dc58b92a9a27286', 'lessThan': '09dc18894148381d3bfc550083b1236043870dce', 'versionType': 'git'}, {'status': 'affected', 'version': 'b40656aa7d559adc1fe689396dc58b92a9a27286', 'lessThan': 'eba5df21eda0fe7418efbea2f799f8ea1b8ca94c', 'versionType': 'git'}, {'status': 'affected', 'version': 'b40656aa7d559adc1fe689396dc58b92a9a27286', 'lessThan': '2904e985a2917b5dac65df82733065e78a65fc9d', 'versionType': 'git'}, {'status': 'affected', 'version': 'b40656aa7d559adc1fe689396dc58b92a9a27286', 'lessThan': '50334a05a950840b39a1ce3d2a173b4183db9b3e', 'versionType': 'git'}, {'status': 'affected', 'version': 'b40656aa7d559adc1fe689396dc58b92a9a27286', 'lessThan': 'badad6fad60def1b9805559dd81dbab3d97b82aa', 'versionType': 'git'}], 'programFiles': ['drivers/infiniband/core/umem.c', 'drivers/infiniband/hw/hns/hns_roce_mr.c', 'drivers/infiniband/hw/irdma/verbs.c', 'drivers/infiniband/hw/mlx4/mr.c', 'drivers/infiniband/hw/mlx5/mr.c', 'drivers/infiniband/sw/rxe/rxe_verbs.c', 'include/rdma/ib_umem.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.2'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.2', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.143', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.94', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.36', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/infiniband/core/umem.c', 'drivers/infiniband/hw/hns/hns_roce_mr.c', 'drivers/infiniband/hw/irdma/verbs.c', 'drivers/infiniband/hw/mlx4/mr.c', 'drivers/infiniband/hw/mlx5/mr.c', 'drivers/infiniband/sw/rxe/rxe_verbs.c', 'include/rdma/ib_umem.h'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: RDMA: During rereg_mr ensure that REREG_ACCESS is compatible If IB_MR_REREG_ACCESS changes from RO to RW then the umem has to be re-evaluated to ensure it is properly pinned as RW. Since the umem is hidden inside each driver's mr struct add a ib_umem_check_rereg() function that each driver has to call before processing IB_MR_REREG_ACCESS. mlx4 has to retain its duplicate ib_access_writable check because it implements IB_MR_REREG_ACCESS | IB_MR_REREG_TRANS by changing both items in place sequentially while the MR is live, so it will continue to not support this combination. Added Reference https://git.kernel.org/stable/c/09dc18894148381d3bfc550083b1236043870dce Added Reference https://git.kernel.org/stable/c/2904e985a2917b5dac65df82733065e78a65fc9d Added Reference https://git.kernel.org/stable/c/50334a05a950840b39a1ce3d2a173b4183db9b3e Added Reference https://git.kernel.org/stable/c/badad6fad60def1b9805559dd81dbab3d97b82aa Added Reference https://git.kernel.org/stable/c/eba5df21eda0fe7418efbea2f799f8ea1b8ca94c