CVE-2026-23378

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

net/sched: act_ife: Fix metalist update behavior

Whenever an ife action replace changes the metalist, instead of

replacing the old data on the metalist, the current ife code is appending

the new metadata. Aside from being innapropriate behavior, this may lead

to an unbounded addition of metadata to the metalist which might cause an

out of bounds error when running the encode op:

[ 138.423369][ C1] ==================================================================

[ 138.424317][ C1] BUG: KASAN: slab-out-of-bounds in ife_tlv_meta_encode (net/ife/ife.c:168)

[ 138.424906][ C1] Write of size 4 at addr ffff8880077f4ffe by task ife_out_out_bou/255

[ 138.425778][ C1] CPU: 1 UID: 0 PID: 255 Comm: ife_out_out_bou Not tainted 7.0.0-rc1-00169-gfbdfa8da05b6 #624 PREEMPT(full)

[ 138.425795][ C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011

[ 138.425800][ C1] Call Trace:

[ 138.425804][ C1] <IRQ>

[

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References