CVE-2021-47458

ocfs2: mount fails with buffer overflow in strlen

State: Published
Severity: 7.1 High
Published: May 22, 2024
Updated: Aug 5, 2026
Reserved: May 21, 2024

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

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	c74a3bdd9b529d924d1abf986079b783dd105ace to before ac011cb3ff7a76b3e0e6e77158ee4ba2f929e1fbAffected c74a3bdd9b529d924d1abf986079b783dd105ace to before 4b74ddcc22ee6455946e80a9c4808801f8f8561eAffected c74a3bdd9b529d924d1abf986079b783dd105ace to before 232ed9752510de4436468b653d145565669c8498Affected c74a3bdd9b529d924d1abf986079b783dd105ace to before 7623b1035ca2d17bde0f6a086ad6844a34648df1Affected c74a3bdd9b529d924d1abf986079b783dd105ace to before d3a83576378b4c904f711598dde2c5e881c4295cAffected c74a3bdd9b529d924d1abf986079b783dd105ace to before 93be0eeea14cf39235e585c8f56df3b3859deaadAffected c74a3bdd9b529d924d1abf986079b783dd105ace to before 0e677ea5b7396f715a76b6b0ef441430e4c4b57fAffected c74a3bdd9b529d924d1abf986079b783dd105ace to before b15fa9224e6e1239414525d8d556d824701849fcAffected
LinuxLinux	3.14Affected before 3.14Not affected 4.4.290 through 4.4.Not affected 4.9.288 through 4.9.Not affected 4.14.253 through 4.14.Not affected 4.19.214 through 4.19.Not affected 5.4.156 through 5.4.Not affected 5.10.76 through 5.10.Not affected 5.14.15 through 5.14.*Not affected 5.15 and laterNot affected

Product

Versions

LinuxLinux

c74a3bdd9b529d924d1abf986079b783dd105ace to before ac011cb3ff7a76b3e0e6e77158ee4ba2f929e1fbAffected
c74a3bdd9b529d924d1abf986079b783dd105ace to before 4b74ddcc22ee6455946e80a9c4808801f8f8561eAffected
c74a3bdd9b529d924d1abf986079b783dd105ace to before 232ed9752510de4436468b653d145565669c8498Affected
c74a3bdd9b529d924d1abf986079b783dd105ace to before 7623b1035ca2d17bde0f6a086ad6844a34648df1Affected
c74a3bdd9b529d924d1abf986079b783dd105ace to before d3a83576378b4c904f711598dde2c5e881c4295cAffected
c74a3bdd9b529d924d1abf986079b783dd105ace to before 93be0eeea14cf39235e585c8f56df3b3859deaadAffected
c74a3bdd9b529d924d1abf986079b783dd105ace to before 0e677ea5b7396f715a76b6b0ef441430e4c4b57fAffected
c74a3bdd9b529d924d1abf986079b783dd105ace to before b15fa9224e6e1239414525d8d556d824701849fcAffected

LinuxLinux

3.14Affected
before 3.14Not affected
4.4.290 through 4.4.*Not affected
4.9.288 through 4.9.*Not affected
4.14.253 through 4.14.*Not affected
4.19.214 through 4.19.*Not affected
5.4.156 through 5.4.*Not affected
5.10.76 through 5.10.*Not affected
5.14.15 through 5.14.*Not affected
5.15 and laterNot affected

References

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