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VULNERABILITIES

CVE-2026-99126 Details

Description

In the Linux kernel, the following vulnerability has been resolved: s390/ctcm: Prevent XID null dereference The mpc_validate_xid() function sets grp->saved_xid2->xid2_flag2 to 0x40 to signal XID validation error. If peer XID is NULL or r/w channel pairing mismatch happens, grp->saved_xid2 is never initialized. An attempt to set the flag in such case leads to NULL dereference. Fix this by using the always available priv->xid->xid2_flag2 instead of grp->saved_xid2->xid2_flag2 for validation errors.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://git.kernel.org/stable/c/1525fb6e2f9f9a2c8c8723ee0959b1130a6b8213 kernel.org
https://git.kernel.org/stable/c/34fa3607b7604b3052b19cec8b0ad644818cdd2a kernel.org
https://git.kernel.org/stable/c/8a2f7a4ad1d81612fa65bfa4d392ba1bb2f5eeab kernel.org
https://git.kernel.org/stable/c/977dac6cc5531a8e058df05b6af94406b940cb9e kernel.org
https://git.kernel.org/stable/c/a7c3e1795e4fe5e6680cab7cd7eee0503b00a248 kernel.org

see all 8 references

Weakness Enumeration

No weakness enumeration is available for this CVE.

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-99126
NVD Published Date:
Oct 28, 2026
NVD Last Modified:
Oct 30, 2026
Source:
kernel.org
CVE-2026-99126 Details - Not Deferred