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VULNERABILITIES

CVE-2021-47458 Details

Description

In the Linux kernel, the following vulnerability has been resolved: ocfs2: mount fails with buffer overflow in strlen Starting with kernel 5.11 built with CONFIG_FORTIFY_SOURCE mouting an ocfs2 filesystem with either o2cb or pcmk cluster stack fails with the trace below. Problem seems to be that strings for cluster stack and cluster name are not guaranteed to be null terminated in the disk representation, while strlcpy assumes that the source string is always null terminated. This causes a read outside of the source string triggering the buffer overflow detection. detected buffer overflow in strlen ------------[ cut here ]------------ kernel BUG at lib/string.c:1149! invalid opcode: 0000 [#1] SMP PTI CPU: 1 PID: 910 Comm: mount.ocfs2 Not tainted 5.14.0-1-amd64 #1 Debian 5.14.6-2 RIP: 0010:fortify_panic+0xf/0x11 ... Call Trace: ocfs2_initialize_super.isra.0.cold+0xc/0x18 [ocfs2] ocfs2_fill_super+0x359/0x19b0 [ocfs2] mount_bdev+0x185/0x1b0 legacy_get_tree+0x27/0x40 vfs_get_tree+0x25/0xb0 path_mount+0x454/0xa20 __x64_sys_mount+0x103/0x140 do_syscall_64+0x3b/0xc0 entry_SYSCALL_64_after_hwframe+0x44/0xae

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA: kernel.orgCVSS-B:7.1 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://git.kernel.org/stable/c/0e677ea5b7396f715a76b6b0ef441430e4c4b57f kernel.orgPatch
https://git.kernel.org/stable/c/232ed9752510de4436468b653d145565669c8498 kernel.orgPatch
https://git.kernel.org/stable/c/4b74ddcc22ee6455946e80a9c4808801f8f8561e kernel.orgPatch
https://git.kernel.org/stable/c/7623b1035ca2d17bde0f6a086ad6844a34648df1 kernel.orgPatch
https://git.kernel.org/stable/c/93be0eeea14cf39235e585c8f56df3b3859deaad kernel.orgPatch

see all 16 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-787Out-of-bounds Write[email protected]

Affected Products

ProductVersions
linux linux kernel
< 4.4.290
>= 4.5, < 4.9.288
>= 4.10, < 4.14.253
>= 4.15, < 4.19.214
>= 4.20, < 5.4.156

CPE

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

7 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-47458
NVD Published Date:
May 22, 2024
NVD Last Modified:
Aug 4, 2026
Source:
kernel.org
CVE-2021-47458 Details - Not Deferred