7.0
HIGH
CVSS 3.1
CVE-2026-64413
netfilter: ebtables: zero chainstack array
Overview
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.
Details
INFO
Published Date :
July 25, 2026, 10:17 a.m.
Last Modified :
Sept. 8, 2026, 9:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
Update the Linux kernel to address a memory corruption vulnerability in netfilter: ebtables.
- Update the Linux kernel to the latest version.
- Apply the netfilter: ebtables patch.
- Reboot the system after updating.
- Verify the patch installation.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64413.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64413 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64413
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64413 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64413 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Sep. 08, 2026
Action Type Old Value New Value Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/64xxx/CVE-2026-64413.json">CVE-2026-64413</a> Added Reference https://cert-portal.siemens.com/productcert/html/ssa-019113.html -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 08, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/29bf41a9b59aff9f6197df58641a00037d567ca8 Added Reference https://git.kernel.org/stable/c/2ade612967e2cdfb9290ebcb773f302c82f311fa Added Reference https://git.kernel.org/stable/c/42bef500d07b5769d916e9122a3e3fa3fd2245ef Added Reference https://git.kernel.org/stable/c/5ee856e4208acafaaaf7b84824d39b78c21345d6 Added Reference https://git.kernel.org/stable/c/9e6c5169db423e51dcc66a73fd15409c0d38e088 Added Reference https://git.kernel.org/stable/c/9f74d28e903fa4fdf82f870d0aeadddc8196e41c Added Reference https://git.kernel.org/stable/c/cbfe53599eebffd188938ab6774cc41794f6f9d5 Added Reference https://git.kernel.org/stable/c/fc7f105451044501a50cfd530cfa3b472c54acbc Removed Reference https://git.kernel.org/stable/c/29bf41a9b59aff9f6197df58641a00037d567ca8 Removed Reference https://git.kernel.org/stable/c/2ade612967e2cdfb9290ebcb773f302c82f311fa Removed Reference https://git.kernel.org/stable/c/42bef500d07b5769d916e9122a3e3fa3fd2245ef Removed Reference https://git.kernel.org/stable/c/5ee856e4208acafaaaf7b84824d39b78c21345d6 Removed Reference https://git.kernel.org/stable/c/9e6c5169db423e51dcc66a73fd15409c0d38e088 Removed Reference https://git.kernel.org/stable/c/9f74d28e903fa4fdf82f870d0aeadddc8196e41c Removed Reference https://git.kernel.org/stable/c/cbfe53599eebffd188938ab6774cc41794f6f9d5 Removed Reference https://git.kernel.org/stable/c/fc7f105451044501a50cfd530cfa3b472c54acbc Removed Reference Type https://git.kernel.org/stable/c/29bf41a9b59aff9f6197df58641a00037d567ca8 Types: Patch Removed Reference Type https://git.kernel.org/stable/c/2ade612967e2cdfb9290ebcb773f302c82f311fa Types: Patch Removed Reference Type https://git.kernel.org/stable/c/42bef500d07b5769d916e9122a3e3fa3fd2245ef Types: Patch Removed Reference Type https://git.kernel.org/stable/c/5ee856e4208acafaaaf7b84824d39b78c21345d6 Types: Patch Removed Reference Type https://git.kernel.org/stable/c/9e6c5169db423e51dcc66a73fd15409c0d38e088 Types: Patch Removed Reference Type https://git.kernel.org/stable/c/9f74d28e903fa4fdf82f870d0aeadddc8196e41c Types: Patch Removed Reference Type https://git.kernel.org/stable/c/cbfe53599eebffd188938ab6774cc41794f6f9d5 Types: Patch Removed Reference Type https://git.kernel.org/stable/c/fc7f105451044501a50cfd530cfa3b472c54acbc Types: Patch -
Initial Analysis by [email protected]
Sep. 04, 2026
Action Type Old Value New Value Added CWE CWE-908 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.212 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.178 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.145 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.39 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.12.1 up to (excluding) 5.10.261 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.1.4 *cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.97 Added Reference Type kernel.org: https://git.kernel.org/stable/c/29bf41a9b59aff9f6197df58641a00037d567ca8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2ade612967e2cdfb9290ebcb773f302c82f311fa Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/42bef500d07b5769d916e9122a3e3fa3fd2245ef Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/5ee856e4208acafaaaf7b84824d39b78c21345d6 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9e6c5169db423e51dcc66a73fd15409c0d38e088 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9f74d28e903fa4fdf82f870d0aeadddc8196e41c Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/cbfe53599eebffd188938ab6774cc41794f6f9d5 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/fc7f105451044501a50cfd530cfa3b472c54acbc Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '2ade612967e2cdfb9290ebcb773f302c82f311fa', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '42bef500d07b5769d916e9122a3e3fa3fd2245ef', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'fc7f105451044501a50cfd530cfa3b472c54acbc', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '9e6c5169db423e51dcc66a73fd15409c0d38e088', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '29bf41a9b59aff9f6197df58641a00037d567ca8', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '9f74d28e903fa4fdf82f870d0aeadddc8196e41c', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '5ee856e4208acafaaaf7b84824d39b78c21345d6', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'cbfe53599eebffd188938ab6774cc41794f6f9d5', 'versionType': 'git'}], 'programFiles': ['net/bridge/netfilter/ebtables.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.12'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.12', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/bridge/netfilter/ebtables.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '2ade612967e2cdfb9290ebcb773f302c82f311fa', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '42bef500d07b5769d916e9122a3e3fa3fd2245ef', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'fc7f105451044501a50cfd530cfa3b472c54acbc', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '9e6c5169db423e51dcc66a73fd15409c0d38e088', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '29bf41a9b59aff9f6197df58641a00037d567ca8', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '9f74d28e903fa4fdf82f870d0aeadddc8196e41c', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '5ee856e4208acafaaaf7b84824d39b78c21345d6', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'cbfe53599eebffd188938ab6774cc41794f6f9d5', 'versionType': 'git'}], 'programFiles': ['net/bridge/netfilter/ebtables.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.12'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.12', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/bridge/netfilter/ebtables.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 27, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 25, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '2ade612967e2cdfb9290ebcb773f302c82f311fa', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '42bef500d07b5769d916e9122a3e3fa3fd2245ef', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'fc7f105451044501a50cfd530cfa3b472c54acbc', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '9e6c5169db423e51dcc66a73fd15409c0d38e088', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '29bf41a9b59aff9f6197df58641a00037d567ca8', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '9f74d28e903fa4fdf82f870d0aeadddc8196e41c', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '5ee856e4208acafaaaf7b84824d39b78c21345d6', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'cbfe53599eebffd188938ab6774cc41794f6f9d5', 'versionType': 'git'}], 'programFiles': ['net/bridge/netfilter/ebtables.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.12'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.12', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/bridge/netfilter/ebtables.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/29bf41a9b59aff9f6197df58641a00037d567ca8 Added Reference https://git.kernel.org/stable/c/2ade612967e2cdfb9290ebcb773f302c82f311fa Added Reference https://git.kernel.org/stable/c/42bef500d07b5769d916e9122a3e3fa3fd2245ef Added Reference https://git.kernel.org/stable/c/5ee856e4208acafaaaf7b84824d39b78c21345d6 Added Reference https://git.kernel.org/stable/c/9e6c5169db423e51dcc66a73fd15409c0d38e088 Added Reference https://git.kernel.org/stable/c/9f74d28e903fa4fdf82f870d0aeadddc8196e41c Added Reference https://git.kernel.org/stable/c/cbfe53599eebffd188938ab6774cc41794f6f9d5 Added Reference https://git.kernel.org/stable/c/fc7f105451044501a50cfd530cfa3b472c54acbc
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.