PT-2026-27749 · Linux · Linux Kernel

Published 2026-01-01 · Updated 2026-03-25 · CVE-2026-23384

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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

Description A kernel stack leak exists in the RDMA/ionic component, specifically within the ionic create cq() function. The issue involves a leak of up to 11 bytes of stack memory due to uninitialized fields in the ionic cq resp structure. Specifically, the rsvd[7] field (7 bytes) is never set, leading to a leak, and under certain conditions where the udma mask only has the first bit set, the cqid[1] field (4 bytes) may also be leaked. The vulnerability occurs because the loop in ionic create cq common() skips indices where the udma mask does not have a corresponding bit set, potentially leaving cqid[1] unwritten.

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

Exploit

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

CVE-2026-23384

Affected Products

Linux Kernel

References · 14

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23384.json · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23384 · Vendor Advisory
• https://git.kernel.org/stable/c/faa72102b178c7ae6c6afea23879e7c84fc59b4e · Patch
• https://ubuntu.com/security/CVE-2026-23384 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-23384 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-23384 · Vendor Advisory
• https://git.kernel.org/stable/c/a6f3e0fa8e862f220c26c2f27e5ddc42eb82ad3e · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23384 · Vendor Advisory
• https://git.kernel.org/stable/c/547d0b07ad73915b323bc21f85c5d3252bebbbcf · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-23384 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-23384 · Security Note
• https://twitter.com/CVEnew/status/2036763458058723566 · Twitter Post
• https://git.kernel.org/linus/faa72102b178c7ae6c6afea23879e7c84fc59b4e · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note