ocfs2: mount fails with buffer overflow in strlen

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2021-47458
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-05-22 07:15:10 UTC
Updated2026-08-04 10:17:04 UTC
DescriptionIn 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

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-787

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c74a3bdd9b529d924d1abf986079b783dd105ace ac011cb3ff7a76b3e0e6e77158ee4ba2f929e1fb git Not specified
CNA Linux Linux affected c74a3bdd9b529d924d1abf986079b783dd105ace 4b74ddcc22ee6455946e80a9c4808801f8f8561e git Not specified
CNA Linux Linux affected c74a3bdd9b529d924d1abf986079b783dd105ace 232ed9752510de4436468b653d145565669c8498 git Not specified
CNA Linux Linux affected c74a3bdd9b529d924d1abf986079b783dd105ace 7623b1035ca2d17bde0f6a086ad6844a34648df1 git Not specified
CNA Linux Linux affected c74a3bdd9b529d924d1abf986079b783dd105ace d3a83576378b4c904f711598dde2c5e881c4295c git Not specified
CNA Linux Linux affected c74a3bdd9b529d924d1abf986079b783dd105ace 93be0eeea14cf39235e585c8f56df3b3859deaad git Not specified
CNA Linux Linux affected c74a3bdd9b529d924d1abf986079b783dd105ace 0e677ea5b7396f715a76b6b0ef441430e4c4b57f git Not specified
CNA Linux Linux affected c74a3bdd9b529d924d1abf986079b783dd105ace b15fa9224e6e1239414525d8d556d824701849fc git Not specified
CNA Linux Linux affected 3.14 Not specified
CNA Linux Linux unaffected 3.14 semver Not specified
CNA Linux Linux unaffected 4.4.290 4.4.* semver Not specified
CNA Linux Linux unaffected 4.9.288 4.9.* semver Not specified
CNA Linux Linux unaffected 4.14.253 4.14.* semver Not specified
CNA Linux Linux unaffected 4.19.214 4.19.* semver Not specified
CNA Linux Linux unaffected 5.4.156 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.76 5.10.* semver Not specified
CNA Linux Linux unaffected 5.14.15 5.14.* semver Not specified
CNA Linux Linux unaffected 5.15 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/4b74ddcc22ee6455946e80a9c4808801f8f8561e af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/0e677ea5b7396f715a76b6b0ef441430e4c4b57f af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/232ed9752510de4436468b653d145565669c8498 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/d3a83576378b4c904f711598dde2c5e881c4295c af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/ac011cb3ff7a76b3e0e6e77158ee4ba2f929e1fb af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/93be0eeea14cf39235e585c8f56df3b3859deaad af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/7623b1035ca2d17bde0f6a086ad6844a34648df1 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/b15fa9224e6e1239414525d8d556d824701849fc af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
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