Answer in brief
CVE-2026-52970 records a Medium severity (CVSS 5.5) vulnerability in netfilter: nft_ct: fix missing expect put in obj eval. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. 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), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=857b46027d6f91150797295752581b7155b9d0e1 <cdb9a25dd3416d427e8b2753210f8baf44207577 || >=857b46027d6f91150797295752581b7155b9d0e1 <26ab32ec73941871c97562ee1f39587950dc3b68 || >=857b46027d6f91150797295752581b7155b9d0e1 <7b96242ceedfe249f158419f3254bcee04173ffe || >=857b46027d6f91150797295752581b7155b9d0e1 <ecca618e1e339494911090474ed87742c0f73976 || >=857b46027d6f91150797295752581b7155b9d0e1 <2aef1b13d5c0285f340512c6c07eb858fd018fd8 || >=857b46027d6f91150797295752581b7155b9d0e1 <1dced0725e2fae3ac3416274db20a7ff5a46931d || >=857b46027d6f91150797295752581b7155b9d0e1 <84c422cea5a45fe56be839f25880f21fd33940cd || >=857b46027d6f91150797295752581b7155b9d0e1 <19f94b6fee75b3ef7fbc06f3745b9a771a8a19a4 | cdb9a25dd3416d427e8b2753210f8baf44207577, 26ab32ec73941871c97562ee1f39587950dc3b68, 7b96242ceedfe249f158419f3254bcee04173ffe, ecca618e1e339494911090474ed87742c0f73976, 2aef1b13d5c0285f340512c6c07eb858fd018fd8, 1dced0725e2fae3ac3416274db20a7ff5a46931d, 84c422cea5a45fe56be839f25880f21fd33940cd, 19f94b6fee75b3ef7fbc06f3745b9a771a8a19a4 |
| Linux/Linuxgeneric | 5.3 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.7 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.7 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.7 <* | * |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_ct: fix missing expect put in obj eval nft_ct_expect_obj_eval() allocates an expectation and may call nf_ct_expect_related(), but never drops its local reference. Add nf_ct_expect_put(exp) before return to balance allocation.
Quoted source text, attributed separately from HOL analysis.