vulnerability
Red Hat: CVE-2025-40240: kernel: sctp: avoid NULL dereference when chunk data buffer is missing (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 8 | (AV:N/AC:L/Au:N/C:N/I:N/A:C) | Dec 4, 2025 | Jan 15, 2026 | Feb 4, 2026 |
Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
Dec 4, 2025
Added
Jan 15, 2026
Modified
Feb 4, 2026
Description
In the Linux kernel, the following vulnerability has been resolved:
sctp: avoid NULL dereference when chunk data buffer is missing
chunk->skb pointer is dereferenced in the if-block where it's supposed
to be NULL only.
chunk->skb can only be NULL if chunk->head_skb is not. Check for frag_list
instead and do it just before replacing chunk->skb. We're sure that
otherwise chunk->skb is non-NULL because of outer if() condition.
Solutions
redhat-upgrade-kernelredhat-upgrade-kernel-rt
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