{"api_version":"1","generated_at":"2026-07-23T13:50:02+00:00","cve":"CVE-2025-21718","urls":{"html":"https://cve.report/CVE-2025-21718","api":"https://cve.report/api/cve/CVE-2025-21718.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-21718","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-21718"},"summary":{"title":"net: rose: fix timer races against user threads","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: rose: fix timer races against user threads\n\nRose timers only acquire the socket spinlock, without\nchecking if the socket is owned by one user thread.\n\nAdd a check and rearm the timers if needed.\n\nBUG: KASAN: slab-use-after-free in rose_timer_expiry+0x31d/0x360 net/rose/rose_timer.c:174\nRead of size 2 at addr ffff88802f09b82a by task swapper/0/0\n\nCPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.13.0-rc5-syzkaller-00172-gd1bf27c4e176 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024\nCall Trace:\n <IRQ>\n  __dump_stack lib/dump_stack.c:94 [inline]\n  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120\n  print_address_description mm/kasan/report.c:378 [inline]\n  print_report+0x169/0x550 mm/kasan/report.c:489\n  kasan_report+0x143/0x180 mm/kasan/report.c:602\n  rose_timer_expiry+0x31d/0x360 net/rose/rose_timer.c:174\n  call_timer_fn+0x187/0x650 kernel/time/timer.c:1793\n  expire_timers kernel/time/timer.c:1844 [inline]\n  __run_timers kernel/time/timer.c:2418 [inline]\n  __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430\n  run_timer_base kernel/time/timer.c:2439 [inline]\n  run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449\n  handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561\n  __do_softirq kernel/softirq.c:595 [inline]\n  invoke_softirq kernel/softirq.c:435 [inline]\n  __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662\n  irq_exit_rcu+0x9/0x30 kernel/softirq.c:678\n  instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]\n  sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049\n </IRQ>","state":"PUBLISHED","assigner":"Linux","published_at":"2025-02-27 02:15:15","updated_at":"2026-07-14 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the Linux kernel, the following vulnerability has been resolved:\n\nnet: rose: fix timer races against user threads\n\nRose timers only acquire the socket spinlock, without\nchecking if the socket is owned by one user thread.\n\nAdd a check and rearm the timers if needed.\n\nBUG: KASAN: slab-use-after-free in rose_timer_expiry+0x31d/0x360 net/rose/rose_timer.c:174\nRead of size 2 at addr ffff88802f09b82a by task swapper/0/0\n\nCPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.13.0-rc5-syzkaller-00172-gd1bf27c4e176 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024\nCall Trace:\n <IRQ>\n  __dump_stack lib/dump_stack.c:94 [inline]\n  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120\n  print_address_description mm/kasan/report.c:378 [inline]\n  print_report+0x169/0x550 mm/kasan/report.c:489\n  kasan_report+0x143/0x180 mm/kasan/report.c:602\n  rose_timer_expiry+0x31d/0x360 net/rose/rose_timer.c:174\n  call_timer_fn+0x187/0x650 kernel/time/timer.c:1793\n  expire_timers kernel/time/timer.c:1844 [inline]\n  __run_timers kernel/time/timer.c:2418 [inline]\n  __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430\n  run_timer_base kernel/time/timer.c:2439 [inline]\n  run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449\n  handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561\n  __do_softirq kernel/softirq.c:595 [inline]\n  invoke_softirq kernel/softirq.c:435 [inline]\n  __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662\n  irq_exit_rcu+0x9/0x30 kernel/softirq.c:678\n  instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]\n  sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049\n </IRQ>"}],"providerMetadata":{"dateUpdated":"2026-05-11T21:05:04.908Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/52f5aff33ca73b2c2fa93f40a3de308012e63cf4"},{"url":"https://git.kernel.org/stable/c/0d5bca3be27bfcf8f980f2fed49b6cbb7dafe4a1"},{"url":"https://git.kernel.org/stable/c/1409b45d4690308c502c6caf22f01c3c205b4717"},{"url":"https://git.kernel.org/stable/c/f55c88e3ca5939a6a8a329024aed8f3d98eea8e4"},{"url":"https://git.kernel.org/stable/c/51c128ba038cf1b79d605cbee325919b45ab95a5"},{"url":"https://git.kernel.org/stable/c/1992fb261c90e9827cf5dc3115d89bb0853252c9"},{"url":"https://git.kernel.org/stable/c/58051a284ac18a3bb815aac6289a679903ddcc3f"},{"url":"https://git.kernel.org/stable/c/5de7665e0a0746b5ad7943554b34db8f8614a196"}],"title":"net: rose: fix timer races against user threads","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2025-21718","datePublished":"2025-02-27T02:07:27.971Z","dateReserved":"2024-12-29T08:45:45.753Z","dateUpdated":"2026-07-14T12:39:51.273Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-02-27 02:15:15","lastModifiedDate":"2026-07-14 13:17:21","problem_types":["CWE-362","CWE-416"],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1,"impactScore":5.9}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.1.129","matchCriteriaId":"7CFA9ED9-656E-463E-A661-B2C4369D63EB"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.76","matchCriteriaId":"A6D70701-9CB6-4222-A957-00A419878993"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.13","matchCriteriaId":"2897389C-A8C3-4D69-90F2-E701B3D66373"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.13.2","matchCriteriaId":"6D4116B1-1BFD-4F23-BA84-169CC05FC5A3"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2025","CveId":"21718","Ordinal":"1","Title":"net: rose: fix timer races against user threads","CVE":"CVE-2025-21718","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"21718","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: rose: fix timer races against user threads\n\nRose timers only acquire the socket spinlock, without\nchecking if the socket is owned by one user thread.\n\nAdd a check and rearm the timers if needed.\n\nBUG: KASAN: slab-use-after-free in rose_timer_expiry+0x31d/0x360 net/rose/rose_timer.c:174\nRead of size 2 at addr ffff88802f09b82a by task swapper/0/0\n\nCPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.13.0-rc5-syzkaller-00172-gd1bf27c4e176 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024\nCall Trace:\n <IRQ>\n  __dump_stack lib/dump_stack.c:94 [inline]\n  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120\n  print_address_description mm/kasan/report.c:378 [inline]\n  print_report+0x169/0x550 mm/kasan/report.c:489\n  kasan_report+0x143/0x180 mm/kasan/report.c:602\n  rose_timer_expiry+0x31d/0x360 net/rose/rose_timer.c:174\n  call_timer_fn+0x187/0x650 kernel/time/timer.c:1793\n  expire_timers kernel/time/timer.c:1844 [inline]\n  __run_timers kernel/time/timer.c:2418 [inline]\n  __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430\n  run_timer_base kernel/time/timer.c:2439 [inline]\n  run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449\n  handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561\n  __do_softirq kernel/softirq.c:595 [inline]\n  invoke_softirq kernel/softirq.c:435 [inline]\n  __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662\n  irq_exit_rcu+0x9/0x30 kernel/softirq.c:678\n  instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]\n  sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049\n </IRQ>","Type":"Description","Title":"net: rose: fix timer races against user threads"}]}}}