vulnerability
Oracle Linux: CVE-2025-40279: ELSA-2026-50006: Unbreakable Enterprise kernel security update (IMPORTANT)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:S/C:P/I:N/A:C) | Dec 6, 2025 | Jan 15, 2026 | Jan 15, 2026 |
Severity
5
CVSS
(AV:L/AC:L/Au:S/C:P/I:N/A:C)
Published
Dec 6, 2025
Added
Jan 15, 2026
Modified
Jan 15, 2026
Description
In the Linux kernel, the following vulnerability has been resolved:
net: sched: act_connmark: initialize struct tc_ife to fix kernel leak
In tcf_connmark_dump(), the variable 'opt' was partially initialized using a
designatied initializer. While the padding bytes are reamined
uninitialized. nla_put() copies the entire structure into a
netlink message, these uninitialized bytes leaked to userspace.
Initialize the structure with memset before assigning its fields
to ensure all members and padding are cleared prior to beign copied.
net: sched: act_connmark: initialize struct tc_ife to fix kernel leak
In tcf_connmark_dump(), the variable 'opt' was partially initialized using a
designatied initializer. While the padding bytes are reamined
uninitialized. nla_put() copies the entire structure into a
netlink message, these uninitialized bytes leaked to userspace.
Initialize the structure with memset before assigning its fields
to ensure all members and padding are cleared prior to beign copied.
Solution
oracle-linux-upgrade-kernel-uek
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