CVE-2026-52908

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Source
https://cve.org/CVERecord?id=CVE-2026-52908
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52908.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-52908
Downstream
Related
Published
2026-06-19T14:00:35Z
Modified
2026-08-12T03:51:38Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
RDMA: During rereg_mr ensure that REREG_ACCESS is compatible
Details

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.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52908.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
b40656aa7d559adc1fe689396dc58b92a9a27286
Fixed
09dc18894148381d3bfc550083b1236043870dce
Fixed
eba5df21eda0fe7418efbea2f799f8ea1b8ca94c
Fixed
2904e985a2917b5dac65df82733065e78a65fc9d
Fixed
50334a05a950840b39a1ce3d2a173b4183db9b3e
Fixed
badad6fad60def1b9805559dd81dbab3d97b82aa

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52908.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.143
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.94
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.36
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
7.0.13

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52908.json"