Veille CVE
CVE-2026-89481
7.5 ÉlevéeDescription
In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix host memory disclosure on R2T for a read command nvme_tcp_handle_r2t() does not check the direction of the request the R2T refers to. A malicious controller can send an R2T for a READ and the host will answer it: nvme_tcp_setup_h2c_data_pdu() builds the H2CData header and nvme_tcp_try_send_data() sends the request's data buffer. That buffer is the READ destination, so its contents go to the controller. The command then completes normally and nothing is logged. Against a test controller that answers every READ with an R2T, a 4096 byte buffered read returned all 4096 bytes, split over two R2Ts. The pages contained stale kernel data, including an array of struct page pointers. Reject an R2T for a request that is not a write.
Produits concernés
Scores CVSS
| Version | Score | Source | Vecteur |
|---|---|---|---|
| 3.1 | 7.5 Élevée | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Références
- https://git.kernel.org/stable/c/3a0b05145053a5fad1a2ddb4e4d87b07385e63e5
- https://git.kernel.org/stable/c/3b3d27670c0c890ba7cf1bc3614cab61bde6d25c
- https://git.kernel.org/stable/c/49a4dcf57608ebf6432dbcb203ed25e7ed581445
- https://git.kernel.org/stable/c/6efbc52237facda35d2d874fe1765bb4839275d8
- https://git.kernel.org/stable/c/a4c3c7310156493797c920b10d8648c07aa05403
- https://git.kernel.org/stable/c/bc4013c7cce58d46f792c8c87bc8c8318a70190e