PT-2026-50926 · Linux · Linux

Published 2026-06-19 · Updated 2026-06-19 · CVE-2026-52908

Positive Technologies (AI Summary)

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the RDMA (Remote Direct Memory Access) component during the rereg mr process. When IB MR REREG ACCESS changes from read-only (RO) to read-write (RW), the umem (user memory) must be re-evaluated to ensure it is correctly pinned as RW. To address this, the ib umem check rereg() function was introduced, which drivers must call before processing IB MR REREG ACCESS.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2026-52908

Affected Products

Linux

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-52908 · Security Note
• https://twitter.com/VulmonFeeds/status/2068006486425403647 · Twitter Post
• https://git.kernel.org/stable/c/badad6fad60def1b9805559dd81dbab3d97b82aa · Note
• https://git.kernel.org/stable/c/2904e985a2917b5dac65df82733065e78a65fc9d · Note
• https://git.kernel.org/stable/c/50334a05a950840b39a1ce3d2a173b4183db9b3e · Note
• https://git.kernel.org/stable/c/09dc18894148381d3bfc550083b1236043870dce · Note
• https://git.kernel.org/stable/c/eba5df21eda0fe7418efbea2f799f8ea1b8ca94c · Note