7.0 High

CVE-2026-64413 In the Linux kernel, the following vulnerability has been resolved: netfilter: ebtables: zero chainstack array sashiko…

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: ebtables: zero chainstack array sashiko reports: looking at ebtables table translation, could a sparse cpu_possible_mask lead to an uninitialized pointer free? If cpu_possible_mask is sparse (for example, CPU 0 and CPU 2 are possible, but CPU 1 is not), the allocation loop skips CPU 1. If vmalloc_node() fails at CPU 2, the cleanup loop will blindly decrement and call vfree() on newinfo->chainstack[1]. Not a real-world bug, such allocation isn't expected to fail in the first place.

Affected products and versions

Product	Affected versions	Fixed in
Linux 7.2	earliest → < 7.2	7.2
Linux 7.1	earliest → < 7.1.4	7.1.4
Linux 6.18	earliest → < 6.18.39	6.18.39
Linux 6.12	earliest → < 6.12.97	6.12.97
Linux 6.6	earliest → < 6.6.145	6.6.145
Linux 6.1	earliest → < 6.1.178	6.1.178
Linux 5.15	earliest → < 5.15.212	5.15.212
Linux 5.10	earliest → < 5.10.261	5.10.261
Linux	2.6.12	No fix stated

Show the 3 other branches

Product	Affected versions	Fixed in
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1	3.1.7 → latest	No fix stated
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1	3.1.7 → latest	No fix stated
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1	3.1.7 → latest	No fix stated