{"apiVersion":"1.0","identifier":"CVE-2026-74749","description":"In the Linux kernel, the following vulnerability has been resolved: rseq: Prevent hard lockup on granted time slice extension __exit_to_user_mode_loop() invokes rseq_grant_timeslice_extension() with interrupts enabled. If the extension is granted it invokes hrtimer_rearm_deferred_tif() to ensure that a pending deferred hrtimer rearm is handled before exiting to user space. Though this invokes __hrtimer_rearm_deferred() which expects to be invoked with interrupts disabled as it takes hrtimer_cpu_base::lock with raw_spin_lock(). That-s a livelock waiting to happen and caught by lockdep: WARNING: ./include/linux/hrtimer_rearm.h:17 at irqentry_exit, CPU#1: slice_test WARNING: inconsistent lock state inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage. Prevent this by disabling interrupts around the invocation of hrtimer_rearm_deferred_tif() in rseq_grant_timeslice_extension(). [ tglx: Massaged change log ]","publishedAt":"2026-08-26T15:16:53","lastModifiedAt":"2026-08-26T15:16:53","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74749","cvssScore":null,"cvssVector":"Pending","epssProbability":0.00162,"riskScore":0,"affectedProduct":"linux","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74749","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74749","en":"https://www.redsauce.net/en/cves/CVE-2026-74749","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74749","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74749","de":"https://www.redsauce.net/de/cves/CVE-2026-74749","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74749","el":"https://www.redsauce.net/el/cves/CVE-2026-74749"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74749"}}