CVEvulnerability

CVE-2021-47179

5.5 MEDIUM Published 2024-03-25 Modified 2026-08-04 Official page ↗
Status
Modified
Published
2024-03-25
Last modified
2026-08-04
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return() Commit de144ff4234f changes _pnfs_return_layout() to call pnfs_mark_matching_lsegs_return() passing NULL as the struct pnfs_layout_range argument. Unfortunately, pnfs_mark_matching_lsegs_return() doesn't check if we have a value here before dereferencing it, causing an oops. I'm able to hit this crash consistently when running connectathon basic tests on NFS v4.1/v4.2 against Ontap.

Affected configurations

• linux linux kernel (>= 4.9.269 < 4.9.271) • linux linux kernel (>= 4.14.233 < 4.14.235) • linux linux kernel (>= 4.19.191 < 4.19.193) • linux linux kernel (>= 5.4.118 < 5.4.124) • linux linux kernel (>= 5.10.36 < 5.10.42) • linux linux kernel (>= 5.12.3 < 5.12.9)

Related

Weakness · CWE (1)

  • CWE-476 NULL Pointer Dereference weakness

References