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CVE-2024-56610

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : dfd402a4c4baae42398ce9180ff424d589b8bffc, <ea6588abcc15d68fdeae777ffe3dd74c02eab407, <=6.1.*, 6.13, <=6.12.*, <f4f2ef66d288ea796ddb8ecbdc2df074ab2d5f4d, <59458fa4ddb47e7891c61b4a928d13d5f5b00aa0, 0, 6.1.120, <889a0d3a35fdedba1c5dcb6410c95c32421680ec, <5.8, 5.10.231, 5.15.174, <0ab4951c1473c7d1ceaf1232eb927109cd1c4859, <dca4e74a918586913d251c0b359e8cc96a3883ea, <=5.10.*, <=6.6.*, 6.12.5, 6.6.66, <=*, <=5.15.*, 5.8

Description

In the Linux kernel, the following vulnerability has been resolved: kcsan: Turn report_filterlist_lock into a raw_spinlock Ran Xiaokai reports that with a KCSAN-enabled PREEMPT_RT kernel, we can see splats like: | BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48 | in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 0, name: swapper/1 | preempt_count: 10002, expected: 0 | RCU nest depth: 0, expected: 0 | no locks held by swapper/1/0. | irq event stamp: 156674 | hardirqs last enabled at (156673): [<ffffffff81130bd9>] do_idle+0x1f9/0x240 | hardirqs last disabled at (156674): [<ffffffff82254f84>] sysvec_apic_timer_interrupt+0x14/0xc0 | softirqs last enabled at (0): [<ffffffff81099f47>] copy_process+0xfc7/0x4b60 | softirqs last disabled at (0): [<0000000000000000>] 0x0 | Preemption disabled at: | [<ffffffff814a3e2a>] paint_ptr+0x2a/0x90 | CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.11.0+ #3 | Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-0-ga698c8995f-prebuilt.qemu.org 04/01/2014 | Call Trace: | <IRQ> | dump_stack_lvl+0x7e/0xc0 | dump_stack+0x1d/0x30 | __might_resched+0x1a2/0x270 | rt_spin_lock+0x68/0x170 | kcsan_skip_report_debugfs+0x43/0xe0 | print_report+0xb5/0x590 | kcsan_report_known_origin+0x1b1/0x1d0 | kcsan_setup_watchpoint+0x348/0x650 | __tsan_unaligned_write1+0x16d/0x1d0 | hrtimer_interrupt+0x3d6/0x430 | __sysvec_apic_timer_interrupt+0xe8/0x3a0 | sysvec_apic_timer_interrupt+0x97/0xc0 | </IRQ> On a detected data race, KCSAN's reporting logic checks if it should filter the report. That list is protected by the report_filterlist_lock *non-raw* spinlock which may sleep on RT kernels. Since KCSAN may report data races in any context, convert it to a raw_spinlock. This requires being careful about when to allocate memory for the filter list itself which can be done via KCSAN's debugfs interface. Concurrent modification of the filter list via debugfs should be rare: the chosen strategy is to optimistically pre-allocate memory before the critical section and discard if unused.

Gravité et risque d'exploitation

CVE-2024-56610 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.22 %, ce qui la place devant 12.0 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions dfd402a4c4baae42398ce9180ff424d589b8bffc, <ea6588abcc15d68fdeae777ffe3dd74c02eab407, <=6.1.*, 6.13, <=6.12.*, <f4f2ef66d288ea796ddb8ecbdc2df074ab2d5f4d, <59458fa4ddb47e7891c61b4a928d13d5f5b00aa0, 0, 6.1.120, <889a0d3a35fdedba1c5dcb6410c95c32421680ec, <5.8, 5.10.231, 5.15.174, <0ab4951c1473c7d1ceaf1232eb927109cd1c4859, <dca4e74a918586913d251c0b359e8cc96a3883ea, <=5.10.*, <=6.6.*, 6.12.5, 6.6.66, <=*, <=5.15.*, 5.8) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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