In the Linux kernel, the following vulnerability has been resolved:
netfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop()
pipapo_drop() passes rulemap[i + 1].n to pipapo_unmap() as the
to_offset argument on every iteration, including the last one where
i == m->field_count - 1. This reads one element past the end of the
stack-allocated rulemap array (declared as rulemap[NFT_PIPAPO_MAX_FIELDS]
with NFT_PIPAPO_MAX_FIELDS == 16).
Although pipapo_unmap() returns early when is_last is true without
using the to_offset value, the argument is evaluated at the call site
before the function body executes, making this a genuine out-of-bounds
stack read confirmed by KASAN:
BUG: KASAN: stack-out-of-bounds in pipapo_drop+0x50c/0x57c [nf_tables]
Read of size 4 at addr ffff8000810e71a4
This frame has 1 object:
[32, 160) 'rulemap'
The buggy address is at offset 164 -- exactly 4 bytes past the end
of the rulemap array.
Pass 0 instead of rulemap[i + 1].n on the last iteration to avoid
the out-of-bounds read.
References
Configurations
Configuration 1 (hide)
|
History
21 May 2026, 16:52
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/0a55d62cdb628923d8a21724374a70c76ac7d19d - Patch | |
| References | () https://git.kernel.org/stable/c/1957e793196e7f8557374fd4eda53abcbb42e1c0 - Patch | |
| References | () https://git.kernel.org/stable/c/324b749aa5b2d516ccfab933df9d3f56e7807f5f - Patch | |
| References | () https://git.kernel.org/stable/c/57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e - Patch | |
| References | () https://git.kernel.org/stable/c/60c1d18781e37bfb96290b86510eb01c5fa24d75 - Patch | |
| References | () https://git.kernel.org/stable/c/d6d8cd2db236a9dd13dbc2d05843b3445cc964b5 - Patch | |
| References | () https://git.kernel.org/stable/c/dfbdac719198778b581bc0dd055df2542edb8c62 - Patch | |
| References | () https://git.kernel.org/stable/c/e047f6fbb975f685d6c9fcef95b3b7787a79b46d - Patch | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.1 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-125 |
08 May 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-08 15:16
Updated : 2026-05-21 16:52
NVD link : CVE-2026-43453
Mitre link : CVE-2026-43453
CVE.ORG link : CVE-2026-43453
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-125
Out-of-bounds Read