Answer in brief
CVE-2025-40078 records a Unknown severity vulnerability in bpf: Explicitly check accesses to bpf_sock_addr. 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 1518F-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.
Answer in brief
CVE-2025-40078 records a Unknown severity vulnerability in bpf: Explicitly check accesses to bpf_sock_addr. 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 1518F-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.
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), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1cedee13d25ab118d325f95588c1a084e9317229 <de44cdc50d2dce8718cb57deddf9cf1be9a7759f || >=1cedee13d25ab118d325f95588c1a084e9317229 <76e04bbb4296fb6eac084dbfc27e02ccc744db3e || >=1cedee13d25ab118d325f95588c1a084e9317229 <6d8b1a21fd5c34622b0c3893c61e4a38d8ba53ec || >=1cedee13d25ab118d325f95588c1a084e9317229 <4f00858cd9bbbdf67159e28b85a8ca9e77c83622 || >=1cedee13d25ab118d325f95588c1a084e9317229 <cdeafacb4f9ff261a96baef519e29480fd7b1019 || >=1cedee13d25ab118d325f95588c1a084e9317229 <fe9d33f0470350558cb08cecb54cf2267b3a45d2 || >=1cedee13d25ab118d325f95588c1a084e9317229 <ad8b4fe5617e3c85fc23267f02500c4f3bf0ff69 || >=1cedee13d25ab118d325f95588c1a084e9317229 <6fabca2fc94d33cdf7ec102058983b086293395f | de44cdc50d2dce8718cb57deddf9cf1be9a7759f, 76e04bbb4296fb6eac084dbfc27e02ccc744db3e, 6d8b1a21fd5c34622b0c3893c61e4a38d8ba53ec, 4f00858cd9bbbdf67159e28b85a8ca9e77c83622, cdeafacb4f9ff261a96baef519e29480fd7b1019, fe9d33f0470350558cb08cecb54cf2267b3a45d2, ad8b4fe5617e3c85fc23267f02500c4f3bf0ff69, 6fabca2fc94d33cdf7ec102058983b086293395f |
| Linux/Linuxgeneric | 4.18 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
Published upstream
Oct 28, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 14, 2026
In the Linux kernel, the following vulnerability has been resolved: bpf: Explicitly check accesses to bpf_sock_addr Syzkaller found a kernel warning on the following sock_addr program: 0: r0 = 0 1: r2 = *(u32 *)(r1 +60) 2: exit which triggers: verifier bug: error during ctx access conversion (0) This is happening because offset 60 in bpf_sock_addr corresponds to an implicit padding of 4 bytes, right after msg_src_ip4. Access to this padding isn't rejected in sock_addr_is_valid_access and it thus later fails to convert the access. This patch fixes it by explicitly checking the various fields of bpf_sock_addr in sock_addr_is_valid_access. I checked the other ctx structures and is_valid_access functions and didn't find any other similar cases. Other cases of (properly handled) padding are covered in new tests in a subsequent patch.
Quoted source text, attributed separately from HOL analysis.
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), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1cedee13d25ab118d325f95588c1a084e9317229 <de44cdc50d2dce8718cb57deddf9cf1be9a7759f || >=1cedee13d25ab118d325f95588c1a084e9317229 <76e04bbb4296fb6eac084dbfc27e02ccc744db3e || >=1cedee13d25ab118d325f95588c1a084e9317229 <6d8b1a21fd5c34622b0c3893c61e4a38d8ba53ec || >=1cedee13d25ab118d325f95588c1a084e9317229 <4f00858cd9bbbdf67159e28b85a8ca9e77c83622 || >=1cedee13d25ab118d325f95588c1a084e9317229 <cdeafacb4f9ff261a96baef519e29480fd7b1019 || >=1cedee13d25ab118d325f95588c1a084e9317229 <fe9d33f0470350558cb08cecb54cf2267b3a45d2 || >=1cedee13d25ab118d325f95588c1a084e9317229 <ad8b4fe5617e3c85fc23267f02500c4f3bf0ff69 || >=1cedee13d25ab118d325f95588c1a084e9317229 <6fabca2fc94d33cdf7ec102058983b086293395f | de44cdc50d2dce8718cb57deddf9cf1be9a7759f, 76e04bbb4296fb6eac084dbfc27e02ccc744db3e, 6d8b1a21fd5c34622b0c3893c61e4a38d8ba53ec, 4f00858cd9bbbdf67159e28b85a8ca9e77c83622, cdeafacb4f9ff261a96baef519e29480fd7b1019, fe9d33f0470350558cb08cecb54cf2267b3a45d2, ad8b4fe5617e3c85fc23267f02500c4f3bf0ff69, 6fabca2fc94d33cdf7ec102058983b086293395f |
| Linux/Linuxgeneric | 4.18 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
Published upstream
Oct 28, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 14, 2026
In the Linux kernel, the following vulnerability has been resolved: bpf: Explicitly check accesses to bpf_sock_addr Syzkaller found a kernel warning on the following sock_addr program: 0: r0 = 0 1: r2 = *(u32 *)(r1 +60) 2: exit which triggers: verifier bug: error during ctx access conversion (0) This is happening because offset 60 in bpf_sock_addr corresponds to an implicit padding of 4 bytes, right after msg_src_ip4. Access to this padding isn't rejected in sock_addr_is_valid_access and it thus later fails to convert the access. This patch fixes it by explicitly checking the various fields of bpf_sock_addr in sock_addr_is_valid_access. I checked the other ctx structures and is_valid_access functions and didn't find any other similar cases. Other cases of (properly handled) padding are covered in new tests in a subsequent patch.
Quoted source text, attributed separately from HOL analysis.