netfilter: synproxy: add mutex to guard hook reference counting
Summary
| CVE | CVE-2026-53269 |
|---|
| State | PUBLISHED |
|---|
| Assigner | Linux |
|---|
| Source Priority | CVE Program / NVD first with legacy fallback |
|---|
| Published | 2026-06-25 09:16:45 UTC |
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| Updated | 2026-06-25 09:16:45 UTC |
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| Description | In the Linux kernel, the following vulnerability has been resolved:
netfilter: synproxy: add mutex to guard hook reference counting
As the synproxy infrastructure register netfilter hooks on-demand when a
user adds the first iptables target or nftables expression, if done
concurrently they can race each other.
Introduce a mutex to serialize the refcount control blocks access from
both frontends. While a per namespace mutex might be more efficient, it
is not needed for target/expression like SYNPROXY. |
|---|
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|
| CNA |
Linux |
Linux |
affected ad49d86e07a497e834cb06f2b151dccd75f8e148 0ec9ddc1bda261a2c57636c74c8b4e53000102c9 git |
Not specified |
| CNA |
Linux |
Linux |
affected ad49d86e07a497e834cb06f2b151dccd75f8e148 56ffbe3a08c01dcdb0d6adee9ce1e535bfb3b389 git |
Not specified |
| CNA |
Linux |
Linux |
affected ad49d86e07a497e834cb06f2b151dccd75f8e148 debc57b83d5b323df74bf010c8d50fe26ad2ed6b git |
Not specified |
| CNA |
Linux |
Linux |
affected ad49d86e07a497e834cb06f2b151dccd75f8e148 0f8ba5e4c53d2e4a536aa68140beda9fe59b2f88 git |
Not specified |
| CNA |
Linux |
Linux |
affected ad49d86e07a497e834cb06f2b151dccd75f8e148 640441348258220e78daed40528b85b8afcedab6 git |
Not specified |
| CNA |
Linux |
Linux |
affected ad49d86e07a497e834cb06f2b151dccd75f8e148 aaf80701dc2f7a48fe543961e21f8ca3924d587c git |
Not specified |
| CNA |
Linux |
Linux |
affected ad49d86e07a497e834cb06f2b151dccd75f8e148 fbf0591275f50eae5733c3d7a8cd6c1e79933ffa git |
Not specified |
| CNA |
Linux |
Linux |
affected ad49d86e07a497e834cb06f2b151dccd75f8e148 2fcba19caaeb2a33017459d3430f057967bb91b6 git |
Not specified |
| CNA |
Linux |
Linux |
affected 5.3 |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.3 semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.10.259 5.10.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.15.210 5.15.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.1.176 6.1.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.6.143 6.6.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.12.94 6.12.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.18.36 6.18.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.0.13 7.0.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.1 * original_commit_for_fix |
Not specified |
References
| Reference | Source | Link | Tags |
|---|
| git.kernel.org/stable/c/0ec9ddc1bda261a2c57636c74c8b4e53000102c9 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/fbf0591275f50eae5733c3d7a8cd6c1e79933ffa |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/2fcba19caaeb2a33017459d3430f057967bb91b6 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/debc57b83d5b323df74bf010c8d50fe26ad2ed6b |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/0f8ba5e4c53d2e4a536aa68140beda9fe59b2f88 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/aaf80701dc2f7a48fe543961e21f8ca3924d587c |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/56ffbe3a08c01dcdb0d6adee9ce1e535bfb3b389 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/640441348258220e78daed40528b85b8afcedab6 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| CVE Program record |
CVE.ORG |
www.cve.org |
canonical |
| NVD vulnerability detail |
NVD |
nvd.nist.gov |
canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.
