Fiche vulnérabilité
CVE-2021-47240 : faille élevée linux linux kernel (CVSS 7.1)
Description
In the Linux kernel, the following vulnerability has been resolved: net: qrtr: fix OOB Read in qrtr_endpoint_post Syzbot reported slab-out-of-bounds Read in qrtr_endpoint_post. The problem was in wrong _size_ type: if (len != ALIGN(size, 4) + hdrlen) goto err; If size from qrtr_hdr is 4294967293 (0xfffffffd), the result of ALIGN(size, 4) will be 0. In case of len == hdrlen and size == 4294967293 in header this check won't fail and skb_put_data(skb, data + hdrlen, size); will read out of bound from data, which is hdrlen allocated block.
En bref
- Sévérité
- Élevée (CVSS 7.1)
- Vecteur CVSS
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- Exploitation active
- Non signalée par la CISA
- Publication
- 21 mai 2024
- Dernière mise à jour
- 4 août 2026
Produits concernés
- linux linux kernel
Références
- Fiche CVE-2021-47240 sur le NVD (NIST)
- git.kernel.org/stable/c/19892ab9c9d838e2e5a7744d36e4bb8b7c329…
- git.kernel.org/stable/c/26b8d10703a9be45d6097946b2b4011f7dd2c…
- git.kernel.org/stable/c/960b08dd36de1e341e3eb43d1c547513e338f…
- git.kernel.org/stable/c/ad9d24c9429e2159d1e279dc3a83191ccb4da…
- git.kernel.org/stable/c/f8111c0d7ed42ede41a3d0d393b104de0730a…