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CVE-2026-68158

Vulnérabilité critique dans Linux (Linux)

CVSS 9.8 · Critique
EPSS 0.7%
Linux•Linux•Versions : 3.12.63, <=6.1.*, <=6.12.*, <4.2, <1732d89dfcd74f6fde9ce70900d316c4a151c153, <3.15, 6.12.101, <3.13, <3.11, 0, 4.1.30, 6831c98ce0b8a3e88db64aa224372effd0dcc694, <=7.1.*, 3.14.75, 032951d32c13b7564dfba82758260cb7aa1149d2, <143ba49ead77ec483c0326f8aaad8649874e99c4, 3.18.39, 5.15.216, <e4473751cc37db41f3f7da25d64a23e0c74570f1, 8777c9f654637d56f4c4ca54eb1bc7c609b70085, <=5.10.*, <=6.6.*, 3.10.103, 6.18.42, 7.1.6, <4.5, 6.1.183, <2ceee3b77b83052648c40fef965f836fd7699d26, 4.4.17, 4.7, <bee4b5b53e7bff0467fd916cc44c9b190733c6bd, 14877928f10667a5606383885d004f7185f33718, <05c90e059269f087becfcce23348496085835c29, 7405d73cea0d0e6c541f5c534078feeb46188844, <=6.18.*, 1196c36fd53c3b1615eb02f986cb727b1dfc1047, bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196, 6b96b2d473701b45df3fea8dd9796b6ec39e6d54, 3.16.39, <=*, 4.6.6, <4.7, <=5.15.*, <3.17, <3.19, 930c532869774ebf8af9efe9484c597f896a7d46, 5.10.265, 6.6.148, 7.2, <f6961070c326bd158c38fa48756cde2bd78c4aaa, <98917a499ec7064c14fc56d180a4fd636fc2784c

Description

In the Linux kernel, the following vulnerability has been resolved: libceph: Fix multiplication overflow in decode_new_up_state_weight() If a message of type CEPH_MSG_OSD_MAP contains a (maliciously) corrupted osdmap, out-of-bounds memory accesses may occur in decode_new_up_state_weight(). This happens because the bounds check for the new_state part is based on calculating its length depending on a len value read from the incoming message. This calculation may overflow leading to an incorrect bounds check. Subsequently, out-of-bounds reads may occur when decoding this part. This patch switches the multiplication to use check_mul_overflow() to abort processing the osdmap if an overflow occurred. Therefore, osdmaps/messages containing large values for len that result in a multiplication overflow are treated as invalid. [ idryomov: rename new_state_len -> new_state_item_size, formatting ]

Gravité et risque d'exploitation

CVE-2026-68158 obtient un score CVSS de 9.8/10, soit une gravité critique. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.71 %, ce qui la place devant 52.8 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions 3.12.63, <=6.1.*, <=6.12.*, <4.2, <1732d89dfcd74f6fde9ce70900d316c4a151c153, <3.15, 6.12.101, <3.13, <3.11, 0, 4.1.30, 6831c98ce0b8a3e88db64aa224372effd0dcc694, <=7.1.*, 3.14.75, 032951d32c13b7564dfba82758260cb7aa1149d2, <143ba49ead77ec483c0326f8aaad8649874e99c4, 3.18.39, 5.15.216, <e4473751cc37db41f3f7da25d64a23e0c74570f1, 8777c9f654637d56f4c4ca54eb1bc7c609b70085, <=5.10.*, <=6.6.*, 3.10.103, 6.18.42, 7.1.6, <4.5, 6.1.183, <2ceee3b77b83052648c40fef965f836fd7699d26, 4.4.17, 4.7, <bee4b5b53e7bff0467fd916cc44c9b190733c6bd, 14877928f10667a5606383885d004f7185f33718, <05c90e059269f087becfcce23348496085835c29, 7405d73cea0d0e6c541f5c534078feeb46188844, <=6.18.*, 1196c36fd53c3b1615eb02f986cb727b1dfc1047, bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196, 6b96b2d473701b45df3fea8dd9796b6ec39e6d54, 3.16.39, <=*, 4.6.6, <4.7, <=5.15.*, <3.17, <3.19, 930c532869774ebf8af9efe9484c597f896a7d46, 5.10.265, 6.6.148, 7.2, <f6961070c326bd158c38fa48756cde2bd78c4aaa, <98917a499ec7064c14fc56d180a4fd636fc2784c) 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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