CVE-2026-90124

Description

In the Linux kernel, the following vulnerability has been resolved: irqchip/renesas-rzg2l: Fix loss of interrupt rzg2l_clear_irq_int() and rzg2l_clear_tint_int() perform a read-modify-write on the ISCR/TSCR status registers to clear the bit for the interrupt just handled. Since these registers are write-0-to-clear per bit, this is racy: If another interrupt's status bit gets set between the read and the write, that bit is written back as 0 by the software-constructed value, clearing an interrupt that hasn't been serviced yet and losing it. This can be reproduced by triggering multiple interrupts at once, e.g.: gpioset -c gpiochip0 355=0 353=0 328=0 352=0 Fix this by writing back only the bit being cleared, with all other bits set to 1, instead of read-modify-writing the whole register. Since 1-bits are left unchanged by hardware, concurrently-set status bits for other interrupts are preserved.

Gravité et risque d'exploitation

CVE-2026-90124 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 0.21 %, ce qui la place devant 9.9 % des CVE référencées.

Que faire ?

• Vérifiez si Linux (versions <50b10bd0c2d721ad38abd1abe3acdefb6caa0944, <=6.1.*, <=6.12.*, <c043591f03a8111f7d306b8122c444a949486269, <38c6831fefde0ff89f8d2dcb924f957a89dec414, 0, 6.1.188, 6.18.52, <3791e242ec2e5a5cd9e010a75ed1125d0e84d394, <=6.6.*, 6.0, 6.6.157, <6.0, 7.2.6, <=6.18.*, 6.12.110, <=7.2.*, 3fed09559cd8be79568d368ce02bf7f2d56259b6, <=*, <dbecbe23dc606c4af68b4591a41124186f5c1802, <b5ba8b861b5d833394bd23df3f4b59883ef18c88, 7.3) 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

• https://git.kernel.org/stable/c/c043591f03a8111f7d306b8122c444a949486269
• https://git.kernel.org/stable/c/b5ba8b861b5d833394bd23df3f4b59883ef18c88
• https://git.kernel.org/stable/c/3791e242ec2e5a5cd9e010a75ed1125d0e84d394
• https://git.kernel.org/stable/c/38c6831fefde0ff89f8d2dcb924f957a89dec414
• https://git.kernel.org/stable/c/dbecbe23dc606c4af68b4591a41124186f5c1802
• https://git.kernel.org/stable/c/50b10bd0c2d721ad38abd1abe3acdefb6caa0944