# CVE-2021-47458: linux: In the Linux kernel, the following vulnerability has been resolved:  ocfs2: mount fails with buffer overflow in strle...

CVE-2021-47458 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47458, released May 22, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-47458
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 22, 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

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.14.16-1 | [DEBIAN-CVE-2021-47458](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47458.md) | May 22, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.14.16-1 | [DEBIAN-CVE-2021-47458](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47458.md) | May 22, 2024 |
| Linux | linux Debian 14 | 5.14.16-1 | [DEBIAN-CVE-2021-47458](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47458.md) | May 22, 2024 |

---

Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.