Answer in brief
CVE-2026-72430 records a Unknown severity vulnerability in net/sched: act_ct: fix nf_connlabels leak on two error paths. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=70f06c115bcca26ceeebf938e48bc8143668e38b <13b561c893c741635adce3781490a7a1099106c8 || >=70f06c115bcca26ceeebf938e48bc8143668e38b <1d51aff78f078af1a80e9496c2f4643f4c0ef0a0 || >=70f06c115bcca26ceeebf938e48bc8143668e38b <0c3d8fc87e10e38fe054ece009d6d1f66bef2cd4 || >=70f06c115bcca26ceeebf938e48bc8143668e38b <16e088016f38cf728a0de709c3335cc5a3850476 | 13b561c893c741635adce3781490a7a1099106c8, 1d51aff78f078af1a80e9496c2f4643f4c0ef0a0, 0c3d8fc87e10e38fe054ece009d6d1f66bef2cd4, 16e088016f38cf728a0de709c3335cc5a3850476 |
| Linux/Linuxgeneric | 6.7 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_ct: fix nf_connlabels leak on two error paths tcf_ct_fill_params() calls nf_connlabels_get() (setting put_labels) when TCA_CT_LABELS is present, but two later error sites use a bare return instead of "goto err", skipping the err: nf_connlabels_put() cleanup. They also precede the "p->put_labels = put_labels" assignment, so the tcf_ct_params_free() fallback does not release the count either. Each failed RTM_NEWACTION on these paths leaks one nf_connlabels reference: net->ct.labels_used is incremented and never released. The action is reachable with CAP_NET_ADMIN over the netns, i.e. from an unprivileged user namespace on default-userns kernels. Impact: an unprivileged user with CAP_NET_ADMIN over a network namespace (e.g. via user namespaces) leaks one nf_connlabels reference per failed RTM_NEWACTION on the two error paths; net->ct.labels_used is never released. The err: label is safe to reach from both sites: p->tmpl is still NULL there (kzalloc'd, not yet assigned) and nf_ct_put(NULL) is a no-op, so no inline release is needed.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-72430 records a Unknown severity vulnerability in net/sched: act_ct: fix nf_connlabels leak on two error paths. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=70f06c115bcca26ceeebf938e48bc8143668e38b <13b561c893c741635adce3781490a7a1099106c8 || >=70f06c115bcca26ceeebf938e48bc8143668e38b <1d51aff78f078af1a80e9496c2f4643f4c0ef0a0 || >=70f06c115bcca26ceeebf938e48bc8143668e38b <0c3d8fc87e10e38fe054ece009d6d1f66bef2cd4 || >=70f06c115bcca26ceeebf938e48bc8143668e38b <16e088016f38cf728a0de709c3335cc5a3850476 | 13b561c893c741635adce3781490a7a1099106c8, 1d51aff78f078af1a80e9496c2f4643f4c0ef0a0, 0c3d8fc87e10e38fe054ece009d6d1f66bef2cd4, 16e088016f38cf728a0de709c3335cc5a3850476 |
| Linux/Linuxgeneric | 6.7 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_ct: fix nf_connlabels leak on two error paths tcf_ct_fill_params() calls nf_connlabels_get() (setting put_labels) when TCA_CT_LABELS is present, but two later error sites use a bare return instead of "goto err", skipping the err: nf_connlabels_put() cleanup. They also precede the "p->put_labels = put_labels" assignment, so the tcf_ct_params_free() fallback does not release the count either. Each failed RTM_NEWACTION on these paths leaks one nf_connlabels reference: net->ct.labels_used is incremented and never released. The action is reachable with CAP_NET_ADMIN over the netns, i.e. from an unprivileged user namespace on default-userns kernels. Impact: an unprivileged user with CAP_NET_ADMIN over a network namespace (e.g. via user namespaces) leaks one nf_connlabels reference per failed RTM_NEWACTION on the two error paths; net->ct.labels_used is never released. The err: label is safe to reach from both sites: p->tmpl is still NULL there (kzalloc'd, not yet assigned) and nf_ct_put(NULL) is a no-op, so no inline release is needed.
Quoted source text, attributed separately from HOL analysis.