CVE-2026-99126Published

s390/ctcm: Prevent XID null dereference

Exact source revision recorded 28 Oct 2026 11:27:43 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-99126

Published

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.

Source published: 28 Oct 2026 10:34:40 UTC
Source modified: 28 Oct 2026 10:34:40 UTC
Observed here: 28 Oct 2026 11:27:43 UTC
Source terms: CVE Program Terms of Use

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