Answer in brief
CVE-2025-21718 records a High severity (CVSS 7.0) vulnerability in net: rose: fix timer races against user threads. 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-2025-21718 records a High severity (CVSS 7.0) vulnerability in net: rose: fix timer races against user threads. 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 7.0. 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 | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <52f5aff33ca73b2c2fa93f40a3de308012e63cf4 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0d5bca3be27bfcf8f980f2fed49b6cbb7dafe4a1 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1409b45d4690308c502c6caf22f01c3c205b4717 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f55c88e3ca5939a6a8a329024aed8f3d98eea8e4 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <51c128ba038cf1b79d605cbee325919b45ab95a5 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1992fb261c90e9827cf5dc3115d89bb0853252c9 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <58051a284ac18a3bb815aac6289a679903ddcc3f || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5de7665e0a0746b5ad7943554b34db8f8614a196 | 52f5aff33ca73b2c2fa93f40a3de308012e63cf4, 0d5bca3be27bfcf8f980f2fed49b6cbb7dafe4a1, 1409b45d4690308c502c6caf22f01c3c205b4717, f55c88e3ca5939a6a8a329024aed8f3d98eea8e4, 51c128ba038cf1b79d605cbee325919b45ab95a5, 1992fb261c90e9827cf5dc3115d89bb0853252c9, 58051a284ac18a3bb815aac6289a679903ddcc3f, 5de7665e0a0746b5ad7943554b34db8f8614a196 |
| Linux/Linuxgeneric | 2.6.12 | 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
Feb 27, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 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: net: rose: fix timer races against user threads Rose timers only acquire the socket spinlock, without checking if the socket is owned by one user thread. Add a check and rearm the timers if needed. BUG: KASAN: slab-use-after-free in rose_timer_expiry+0x31d/0x360 net/rose/rose_timer.c:174 Read of size 2 at addr ffff88802f09b82a by task swapper/0/0 CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.13.0-rc5-syzkaller-00172-gd1bf27c4e176 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 rose_timer_expiry+0x31d/0x360 net/rose/rose_timer.c:174 call_timer_fn+0x187/0x650 kernel/time/timer.c:1793 expire_timers kernel/time/timer.c:1844 [inline] __run_timers kernel/time/timer.c:2418 [inline] __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430 run_timer_base kernel/time/timer.c:2439 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561 __do_softirq kernel/softirq.c:595 [inline] invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 </IRQ>
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.0. 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 | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <52f5aff33ca73b2c2fa93f40a3de308012e63cf4 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0d5bca3be27bfcf8f980f2fed49b6cbb7dafe4a1 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1409b45d4690308c502c6caf22f01c3c205b4717 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f55c88e3ca5939a6a8a329024aed8f3d98eea8e4 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <51c128ba038cf1b79d605cbee325919b45ab95a5 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1992fb261c90e9827cf5dc3115d89bb0853252c9 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <58051a284ac18a3bb815aac6289a679903ddcc3f || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5de7665e0a0746b5ad7943554b34db8f8614a196 | 52f5aff33ca73b2c2fa93f40a3de308012e63cf4, 0d5bca3be27bfcf8f980f2fed49b6cbb7dafe4a1, 1409b45d4690308c502c6caf22f01c3c205b4717, f55c88e3ca5939a6a8a329024aed8f3d98eea8e4, 51c128ba038cf1b79d605cbee325919b45ab95a5, 1992fb261c90e9827cf5dc3115d89bb0853252c9, 58051a284ac18a3bb815aac6289a679903ddcc3f, 5de7665e0a0746b5ad7943554b34db8f8614a196 |
| Linux/Linuxgeneric | 2.6.12 | 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
Feb 27, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 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: net: rose: fix timer races against user threads Rose timers only acquire the socket spinlock, without checking if the socket is owned by one user thread. Add a check and rearm the timers if needed. BUG: KASAN: slab-use-after-free in rose_timer_expiry+0x31d/0x360 net/rose/rose_timer.c:174 Read of size 2 at addr ffff88802f09b82a by task swapper/0/0 CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.13.0-rc5-syzkaller-00172-gd1bf27c4e176 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 rose_timer_expiry+0x31d/0x360 net/rose/rose_timer.c:174 call_timer_fn+0x187/0x650 kernel/time/timer.c:1793 expire_timers kernel/time/timer.c:1844 [inline] __run_timers kernel/time/timer.c:2418 [inline] __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430 run_timer_base kernel/time/timer.c:2439 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561 __do_softirq kernel/softirq.c:595 [inline] invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 </IRQ>
Quoted source text, attributed separately from HOL analysis.