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CVE-2025-38229

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <9bff888c92f5c25effbb876d22a793c2388c1ccc, <2.6.13, <=6.1.*, <=6.12.*, <84eca597baa346f09b30accdaeca10ced3eeba2d, <8b35b50b7e98d8e9a0a27257c8424448afae10de, 0, 22c6d93a73105fddd58796d7cb10f5f90ee2a338, <=6.15.*, <390b864e3281802109dfe56e508396683e125653, 2.6.13, 5.15.186, <=5.10.*, <=6.6.*, 5.4.296, 6.1.142, 5.10.239, <77829a5f5a74026b888b0529628475b29750cef4, <04354c529c8246a38ae28f713fd6bfdc028113bc, <=5.4.*, 6.16, <73fb3b92da84637e3817580fa205d48065924e15, 6.12.35, <=*, <=5.15.*, 6.15.4, 6.6.95, <41807a5f67420464ac8ee7741504f6b5decb3b7c

Description

In the Linux kernel, the following vulnerability has been resolved: media: cxusb: no longer judge rbuf when the write fails syzbot reported a uninit-value in cxusb_i2c_xfer. [1] Only when the write operation of usb_bulk_msg() in dvb_usb_generic_rw() succeeds and rlen is greater than 0, the read operation of usb_bulk_msg() will be executed to read rlen bytes of data from the dvb device into the rbuf. In this case, although rlen is 1, the write operation failed which resulted in the dvb read operation not being executed, and ultimately variable i was not initialized. [1] BUG: KMSAN: uninit-value in cxusb_gpio_tuner drivers/media/usb/dvb-usb/cxusb.c:124 [inline] BUG: KMSAN: uninit-value in cxusb_i2c_xfer+0x153a/0x1a60 drivers/media/usb/dvb-usb/cxusb.c:196 cxusb_gpio_tuner drivers/media/usb/dvb-usb/cxusb.c:124 [inline] cxusb_i2c_xfer+0x153a/0x1a60 drivers/media/usb/dvb-usb/cxusb.c:196 __i2c_transfer+0xe25/0x3150 drivers/i2c/i2c-core-base.c:-1 i2c_transfer+0x317/0x4a0 drivers/i2c/i2c-core-base.c:2315 i2c_transfer_buffer_flags+0x125/0x1e0 drivers/i2c/i2c-core-base.c:2343 i2c_master_send include/linux/i2c.h:109 [inline] i2cdev_write+0x210/0x280 drivers/i2c/i2c-dev.c:183 do_loop_readv_writev fs/read_write.c:848 [inline] vfs_writev+0x963/0x14e0 fs/read_write.c:1057 do_writev+0x247/0x5c0 fs/read_write.c:1101 __do_sys_writev fs/read_write.c:1169 [inline] __se_sys_writev fs/read_write.c:1166 [inline] __x64_sys_writev+0x98/0xe0 fs/read_write.c:1166 x64_sys_call+0x2229/0x3c80 arch/x86/include/generated/asm/syscalls_64.h:21 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Gravité et risque d'exploitation

CVE-2025-38229 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 0.18 %, ce qui la place devant 7.3 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <9bff888c92f5c25effbb876d22a793c2388c1ccc, <2.6.13, <=6.1.*, <=6.12.*, <84eca597baa346f09b30accdaeca10ced3eeba2d, <8b35b50b7e98d8e9a0a27257c8424448afae10de, 0, 22c6d93a73105fddd58796d7cb10f5f90ee2a338, <=6.15.*, <390b864e3281802109dfe56e508396683e125653, 2.6.13, 5.15.186, <=5.10.*, <=6.6.*, 5.4.296, 6.1.142, 5.10.239, <77829a5f5a74026b888b0529628475b29750cef4, <04354c529c8246a38ae28f713fd6bfdc028113bc, <=5.4.*, 6.16, <73fb3b92da84637e3817580fa205d48065924e15, 6.12.35, <=*, <=5.15.*, 6.15.4, 6.6.95, <41807a5f67420464ac8ee7741504f6b5decb3b7c) 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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