Answer in brief
CVE-2026-22994 records a Medium severity (CVSS 5.5) vulnerability in bpf: Fix reference count leak in bpf_prog_test_run_xdp(). 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-2026-22994 records a Medium severity (CVSS 5.5) vulnerability in bpf: Fix reference count leak in bpf_prog_test_run_xdp(). 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 | >=1c194998252469cad00a08bd9ef0b99fd255c260 <368569bc546d3368ee9980ba79fc42fdff9a3365 || >=1c194998252469cad00a08bd9ef0b99fd255c260 <98676ee71fd4eafeb8be63c7f3f1905d40e03101 || >=1c194998252469cad00a08bd9ef0b99fd255c260 <fb9ef40cccdbacce36029b305d0ef1e12e4fea38 || >=1c194998252469cad00a08bd9ef0b99fd255c260 <737be05a765761d7d7c9f7fe92274bd8e6f6951e || >=1c194998252469cad00a08bd9ef0b99fd255c260 <ec69daabe45256f98ac86c651b8ad1b2574489a7 | 368569bc546d3368ee9980ba79fc42fdff9a3365, 98676ee71fd4eafeb8be63c7f3f1905d40e03101, fb9ef40cccdbacce36029b305d0ef1e12e4fea38, 737be05a765761d7d7c9f7fe92274bd8e6f6951e, ec69daabe45256f98ac86c651b8ad1b2574489a7 |
| Linux/Linuxgeneric | 5.18 | 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
Jan 23, 2026
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: Fix reference count leak in bpf_prog_test_run_xdp() syzbot is reporting unregister_netdevice: waiting for sit0 to become free. Usage count = 2 problem. A debug printk() patch found that a refcount is obtained at xdp_convert_md_to_buff() from bpf_prog_test_run_xdp(). According to commit ec94670fcb3b ("bpf: Support specifying ingress via xdp_md context in BPF_PROG_TEST_RUN"), the refcount obtained by xdp_convert_md_to_buff() will be released by xdp_convert_buff_to_md(). Therefore, we can consider that the error handling path introduced by commit 1c1949982524 ("bpf: introduce frags support to bpf_prog_test_run_xdp()") forgot to call xdp_convert_buff_to_md().
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 | >=1c194998252469cad00a08bd9ef0b99fd255c260 <368569bc546d3368ee9980ba79fc42fdff9a3365 || >=1c194998252469cad00a08bd9ef0b99fd255c260 <98676ee71fd4eafeb8be63c7f3f1905d40e03101 || >=1c194998252469cad00a08bd9ef0b99fd255c260 <fb9ef40cccdbacce36029b305d0ef1e12e4fea38 || >=1c194998252469cad00a08bd9ef0b99fd255c260 <737be05a765761d7d7c9f7fe92274bd8e6f6951e || >=1c194998252469cad00a08bd9ef0b99fd255c260 <ec69daabe45256f98ac86c651b8ad1b2574489a7 | 368569bc546d3368ee9980ba79fc42fdff9a3365, 98676ee71fd4eafeb8be63c7f3f1905d40e03101, fb9ef40cccdbacce36029b305d0ef1e12e4fea38, 737be05a765761d7d7c9f7fe92274bd8e6f6951e, ec69daabe45256f98ac86c651b8ad1b2574489a7 |
| Linux/Linuxgeneric | 5.18 | 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
Jan 23, 2026
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: Fix reference count leak in bpf_prog_test_run_xdp() syzbot is reporting unregister_netdevice: waiting for sit0 to become free. Usage count = 2 problem. A debug printk() patch found that a refcount is obtained at xdp_convert_md_to_buff() from bpf_prog_test_run_xdp(). According to commit ec94670fcb3b ("bpf: Support specifying ingress via xdp_md context in BPF_PROG_TEST_RUN"), the refcount obtained by xdp_convert_md_to_buff() will be released by xdp_convert_buff_to_md(). Therefore, we can consider that the error handling path introduced by commit 1c1949982524 ("bpf: introduce frags support to bpf_prog_test_run_xdp()") forgot to call xdp_convert_buff_to_md().
Quoted source text, attributed separately from HOL analysis.