{"id":"DEBIAN-CVE-2025-21718","details":"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:  \u003cIRQ\u003e   __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  \u003c/IRQ\u003e","modified":"2026-09-01T16:06:09.746325118Z","published":"2025-02-27T02:15:15.473Z","upstream":["CVE-2025-21718"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-21718"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.129-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-21718.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.13-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-21718.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.13-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-21718.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}