RDMA/uverbs: Validate wqe_size before using it in ib_uverbs_post_send (Linux Linux)

CVE-2026-45856
HIGH 7.1

En bref

Source
NVD
EPSS
EPSS 0.19 % · centile 8 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/uverbs: Validate wqe_size before using it in ib_uverbs_post_send ib_uverbs_post_send() uses cmd.wqe_size from userspace without any validation before passing it to kmalloc() and using the allocated buffer as struct ib_uverbs_send_wr. If a user provides a small wqe_size value (e.g., 1), kmalloc() will succeed, but subsequent accesses to user_wr->opcode, user_wr->num_sge, and other fields will read beyond the allocated buffer, resulting in an out-of-bounds read from kernel heap memory. This could potentially leak sensitive kernel information to userspace. Additionally, providing an excessively large wqe_size can trigger a WARNING in the memory allocation path, as reported by syzkaller. This is inconsistent with ib_uverbs_unmarshall_recv() which properly validates that wqe_size >= sizeof(struct ib_uverbs_recv_wr) before proceeding. Add the same validation for ib_uverbs_post_send() to ensure wqe_size is at least sizeof(struct ib_uverbs_send_wr).

Faiblesses (CWE)

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HLinux
CVSS 3.1HIGH 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected c3bea3d2dc5358e05541527283279102383b0231 < 9c15ec4cd4e7f57c6bbcb4e73e99290f150dd2a7 ; affected c3bea3d2dc5358e05541527283279102383b0231 < 9b5ac1c15334d46c0dbd49d64a2257b929500163 ; affected c3bea3d2dc5358e05541527283279102383b0231 < 01c9b152647dc70dc06a4a2eff86ebb3b3c76075 ; affected c3bea3d2dc5358e05541527283279102383b0231 < bf1feed1a7886af945f92890493aefd2b5c9928a ; affected c3bea3d2dc5358e05541527283279102383b0231 < d533425ac1f2925b4fc3e4ed9b9d72362cb23475 ; affected c3bea3d2dc5358e05541527283279102383b0231 < bf4454da8b1e712714628c0a0d6e7845bb40790a
Linux · Linuxaffected 5.0 ; unaffected 0 < 5.0 ; unaffected 5.10.252 ≤ 5.10.* ; unaffected 5.15.202 ≤ 5.15.* ; unaffected 6.1.165 ≤ 6.1.* ; unaffected 6.6.128 ≤ 6.6.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD