Answer in brief
CVE-2025-71120 records a Medium severity (CVSS 5.5) vulnerability in SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf. 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-2025-71120 records a Medium severity (CVSS 5.5) vulnerability in SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf. 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.
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 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 | >=5866efa8cbfbadf3905072798e96652faf02dbe8 <a8f1e445ce3545c90d69c9e8ff8f7821825fe810 || >=5866efa8cbfbadf3905072798e96652faf02dbe8 <4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d || >=5866efa8cbfbadf3905072798e96652faf02dbe8 <f9e53f69ac3bc4ef568b08d3542edac02e83fefd || >=5866efa8cbfbadf3905072798e96652faf02dbe8 <7452d53f293379e2c38cfa8ad0694aa46fc4788b || >=5866efa8cbfbadf3905072798e96652faf02dbe8 <a2c6f25ab98b423f99ccd94874d655b8bcb01a19 || >=5866efa8cbfbadf3905072798e96652faf02dbe8 <1c8bb965e9b0559ff0f5690615a527c30f651dd8 || >=5866efa8cbfbadf3905072798e96652faf02dbe8 <d4b69a6186b215d2dc1ebcab965ed88e8d41768d || 66ed7b413d31c6ff23901ac4443b1cc1af2f6113 || 7be8c165dc81564705e8e0b72d398ef708f67eaa || >=4.19.99 <4.20 || >=5.4.15 <5.5 | a8f1e445ce3545c90d69c9e8ff8f7821825fe810, 4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d, f9e53f69ac3bc4ef568b08d3542edac02e83fefd, 7452d53f293379e2c38cfa8ad0694aa46fc4788b, a2c6f25ab98b423f99ccd94874d655b8bcb01a19, 1c8bb965e9b0559ff0f5690615a527c30f651dd8, d4b69a6186b215d2dc1ebcab965ed88e8d41768d, 4.20, 5.5 |
| Linux/Linuxgeneric | 5.5 | 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
Jan 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 30, 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: SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf A zero length gss_token results in pages == 0 and in_token->pages[0] is NULL. The code unconditionally evaluates page_address(in_token->pages[0]) for the initial memcpy, which can dereference NULL even when the copy length is 0. Guard the first memcpy so it only runs when length > 0.
Quoted source text, attributed separately from HOL analysis.
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 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 | >=5866efa8cbfbadf3905072798e96652faf02dbe8 <a8f1e445ce3545c90d69c9e8ff8f7821825fe810 || >=5866efa8cbfbadf3905072798e96652faf02dbe8 <4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d || >=5866efa8cbfbadf3905072798e96652faf02dbe8 <f9e53f69ac3bc4ef568b08d3542edac02e83fefd || >=5866efa8cbfbadf3905072798e96652faf02dbe8 <7452d53f293379e2c38cfa8ad0694aa46fc4788b || >=5866efa8cbfbadf3905072798e96652faf02dbe8 <a2c6f25ab98b423f99ccd94874d655b8bcb01a19 || >=5866efa8cbfbadf3905072798e96652faf02dbe8 <1c8bb965e9b0559ff0f5690615a527c30f651dd8 || >=5866efa8cbfbadf3905072798e96652faf02dbe8 <d4b69a6186b215d2dc1ebcab965ed88e8d41768d || 66ed7b413d31c6ff23901ac4443b1cc1af2f6113 || 7be8c165dc81564705e8e0b72d398ef708f67eaa || >=4.19.99 <4.20 || >=5.4.15 <5.5 | a8f1e445ce3545c90d69c9e8ff8f7821825fe810, 4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d, f9e53f69ac3bc4ef568b08d3542edac02e83fefd, 7452d53f293379e2c38cfa8ad0694aa46fc4788b, a2c6f25ab98b423f99ccd94874d655b8bcb01a19, 1c8bb965e9b0559ff0f5690615a527c30f651dd8, d4b69a6186b215d2dc1ebcab965ed88e8d41768d, 4.20, 5.5 |
| Linux/Linuxgeneric | 5.5 | 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
Jan 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 30, 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: SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf A zero length gss_token results in pages == 0 and in_token->pages[0] is NULL. The code unconditionally evaluates page_address(in_token->pages[0]) for the initial memcpy, which can dereference NULL even when the copy length is 0. Guard the first memcpy so it only runs when length > 0.
Quoted source text, attributed separately from HOL analysis.