CVEvulnerability

CVE-2021-47259

7.8 HIGH Published 2024-05-21 Modified 2026-08-04 Official page ↗
Status
Modified
Published
2024-05-21
Last modified
2026-08-04
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.5 HIGH — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: NFS: Fix use-after-free in nfs4_init_client() KASAN reports a use-after-free when attempting to mount two different exports through two different NICs that belong to the same server. Olga was able to hit this with kernels starting somewhere between 5.7 and 5.10, but I traced the patch that introduced the clear_bit() call to 4.13. So something must have changed in the refcounting of the clp pointer to make this call to nfs_put_client() the very last one.

Affected configurations

• linux linux kernel (>= 4.13 < 4.14.237) • linux linux kernel (>= 4.15 < 4.19.195) • linux linux kernel (>= 4.20 < 5.4.126) • linux linux kernel (>= 5.5 < 5.10.44) • linux linux kernel (>= 5.11 < 5.12.11) • linux linux kernel 5.13

Related

Weakness · CWE (1)

References