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CVE-2026-68368

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <=6.1.*, 4.9.235, <f87ed889f0f7417b8938c98d8833f559b755373c, <=6.12.*, 5.4.259, 6.12.101, <35d15bbaec0557330e774ec31412ef508de6e0e0, 0, <1febec7e47cdcd01f43fb0211094e3010474666e, <=7.1.*, <4.10, 5.15.216, 4.19.297, <40c706a0224bde194667e3378c689b542fec4b44, 471b23586387a32857778c511be60ab31c98dcfd, <4.20, <41fd5f2fb0027d3773ae949e3247c2e0a2a7fe5c, <=5.10.*, <=6.6.*, 2b74b0a04d3e9f9f08ff026e5663dce88ff94e52, 6.18.42, ae6a5394d9fbe118bc95cfe376d6a9d91d7547e8, 7.1.6, 4.14.328, <6b2be489eaa6293e60549005d91f15ceb150510f, e7ca00f35d8a17af1ae19d529193ebc21bfda164, 6.1.183, <5.5, b88ad6e714284b33a47834f5f2a294c2b37c66aa, <=6.18.*, 5.9, <5.9, ff3ba016263ee93a1c6209bf5ab1599de7ab1512, <=*, <fff1059d139ef798bab917990524faaf25854ca8, 5.8.6, 4.14.196, f7e0611e207d8908c4f2858e244370529a76dbf7, <=5.15.*, <e07751d0527ccc2a1c32eb0b0b7da3b4b9b5381f, 5.4.62, <4.15, 5.10.265, 6.6.148, 7.2, 5bdf93a2f5459f944b416b188178ca4a92fd206f, 4.19.143, 4f529c4d1e436230d3af7c09a3239677a14d2b46

Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_ncm: validate datagram bounds in ncm_unwrap_ntb() When unpacking host-supplied NTBs, ncm_unwrap_ntb() checks datagram length against frame_max but does not verify that the datagram fits within the declared block length. Additionally, when decoding multiple NTBs from a single socket buffer, subsequent block lengths are not checked against the actual remaining buffer data. With these checks missing, a malicious USB host can specify datagram offsets and lengths that point beyond the block, or supply secondary NTB headers declaring lengths larger than the buffer. skb_put_data() then copies adjacent kernel memory from skb_shared_info into the network skb. Fix this by verifying that sufficient buffer space remains for the NTB header before parsing, handling zero-length block declarations, ensuring that block lengths never exceed the remaining buffer space, and verifying that each datagram payload stays strictly within the block boundary.

Gravité et risque d'exploitation

CVE-2026-68368 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 11.4 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, 4.9.235, <f87ed889f0f7417b8938c98d8833f559b755373c, <=6.12.*, 5.4.259, 6.12.101, <35d15bbaec0557330e774ec31412ef508de6e0e0, 0, <1febec7e47cdcd01f43fb0211094e3010474666e, <=7.1.*, <4.10, 5.15.216, 4.19.297, <40c706a0224bde194667e3378c689b542fec4b44, 471b23586387a32857778c511be60ab31c98dcfd, <4.20, <41fd5f2fb0027d3773ae949e3247c2e0a2a7fe5c, <=5.10.*, <=6.6.*, 2b74b0a04d3e9f9f08ff026e5663dce88ff94e52, 6.18.42, ae6a5394d9fbe118bc95cfe376d6a9d91d7547e8, 7.1.6, 4.14.328, <6b2be489eaa6293e60549005d91f15ceb150510f, e7ca00f35d8a17af1ae19d529193ebc21bfda164, 6.1.183, <5.5, b88ad6e714284b33a47834f5f2a294c2b37c66aa, <=6.18.*, 5.9, <5.9, ff3ba016263ee93a1c6209bf5ab1599de7ab1512, <=*, <fff1059d139ef798bab917990524faaf25854ca8, 5.8.6, 4.14.196, f7e0611e207d8908c4f2858e244370529a76dbf7, <=5.15.*, <e07751d0527ccc2a1c32eb0b0b7da3b4b9b5381f, 5.4.62, <4.15, 5.10.265, 6.6.148, 7.2, 5bdf93a2f5459f944b416b188178ca4a92fd206f, 4.19.143, 4f529c4d1e436230d3af7c09a3239677a14d2b46) 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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