CVE-2026-98612
Vulnérabilité non évaluée dans Linux (Linux)
Description
In the Linux kernel, the following vulnerability has been resolved: net: usb: catc: bound the RX packet length in catc_rx_done() catc_rx_done() walks a multi-packet URB, reading a two-byte length from each packet header. Its bound, pkt_len > urb->actual_length, ignores the header offset and compares against the whole transfer rather than the bytes left from pkt_start, so a crafted packet header makes skb_copy_to_linear_data() read past the buffer. A length below ETH_HLEN is also accepted, including zero, and eth_type_trans() then reads a MAC header from the uninitialised tailroom of a shorter skb. The is_f5u011 branch takes its length straight from the transfer, so a zero-length URB reaches the same path. Track the bytes remaining from the current packet, and reject a header that does not fit, a length past what is left, and a length below an Ethernet header. A transfer shorter than an Ethernet header, including a zero-length one, previously became a runt skb passed to netif_rx() and counted as received; it is now counted in rx_length_errors and ends the walk.
Gravité et risque d'exploitation
CVE-2026-98612 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 0.19 %, ce qui la place devant 8.2 % des CVE référencées.
Que faire ?
- Vérifiez si Linux (versions <dd9c6f8f05170223edec2dac476606cd40d9acb7, <=6.1.*, <=6.12.*, <3942557938f846e7481f6ccb2b41ccbdee61baa1, <801e21cf7dd6bcee31db907625d5045f21c9c1d9, 2.6.12, <2f87bbd5a7bf6ee79d598f7e22cf77810d29ae87, 6.18.55, 0, <2.6.12, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 6.12.112, 5.10.271, 6.6.158, <=5.10.*, <=6.6.*, 6.1.189, <4cc0a8eb2f9336cfa3e4ac329bc5585ca970ced3, <9d4be026bdff2c1da7b6c7e01c0a47f2df409e97, <=6.18.*, 5.15.222, <=7.2.*, 7.2.9, <9d565b6b72fe3f41fd43636e143072848105189f, <=*, <=5.15.*, <21e206dd88b3de6e36bb607dec3797c59bc3007b, 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/3942557938f846e7481f6ccb2b41ccbdee61baa1
- https://git.kernel.org/stable/c/2f87bbd5a7bf6ee79d598f7e22cf77810d29ae87
- https://git.kernel.org/stable/c/4cc0a8eb2f9336cfa3e4ac329bc5585ca970ced3
- https://git.kernel.org/stable/c/21e206dd88b3de6e36bb607dec3797c59bc3007b
- https://git.kernel.org/stable/c/801e21cf7dd6bcee31db907625d5045f21c9c1d9
- https://git.kernel.org/stable/c/dd9c6f8f05170223edec2dac476606cd40d9acb7
- https://git.kernel.org/stable/c/9d4be026bdff2c1da7b6c7e01c0a47f2df409e97
- https://git.kernel.org/stable/c/9d565b6b72fe3f41fd43636e143072848105189f
