Answer in brief
CVE-2021-47458 records a High severity (CVSS 7.1) vulnerability in ocfs2: mount fails with buffer overflow in strlen. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2021-47458 records a High severity (CVSS 7.1) vulnerability in ocfs2: mount fails with buffer overflow in strlen. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=c74a3bdd9b529d924d1abf986079b783dd105ace <ac011cb3ff7a76b3e0e6e77158ee4ba2f929e1fb || >=c74a3bdd9b529d924d1abf986079b783dd105ace <4b74ddcc22ee6455946e80a9c4808801f8f8561e || >=c74a3bdd9b529d924d1abf986079b783dd105ace <232ed9752510de4436468b653d145565669c8498 || >=c74a3bdd9b529d924d1abf986079b783dd105ace <7623b1035ca2d17bde0f6a086ad6844a34648df1 || >=c74a3bdd9b529d924d1abf986079b783dd105ace <d3a83576378b4c904f711598dde2c5e881c4295c || >=c74a3bdd9b529d924d1abf986079b783dd105ace <93be0eeea14cf39235e585c8f56df3b3859deaad || >=c74a3bdd9b529d924d1abf986079b783dd105ace <0e677ea5b7396f715a76b6b0ef441430e4c4b57f || >=c74a3bdd9b529d924d1abf986079b783dd105ace <b15fa9224e6e1239414525d8d556d824701849fc | ac011cb3ff7a76b3e0e6e77158ee4ba2f929e1fb, 4b74ddcc22ee6455946e80a9c4808801f8f8561e, 232ed9752510de4436468b653d145565669c8498, 7623b1035ca2d17bde0f6a086ad6844a34648df1, d3a83576378b4c904f711598dde2c5e881c4295c, 93be0eeea14cf39235e585c8f56df3b3859deaad, 0e677ea5b7396f715a76b6b0ef441430e4c4b57f, b15fa9224e6e1239414525d8d556d824701849fc |
| Linux/Linuxgeneric | 3.14 | Not reported |
Published upstream
May 22, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
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
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=c74a3bdd9b529d924d1abf986079b783dd105ace <ac011cb3ff7a76b3e0e6e77158ee4ba2f929e1fb || >=c74a3bdd9b529d924d1abf986079b783dd105ace <4b74ddcc22ee6455946e80a9c4808801f8f8561e || >=c74a3bdd9b529d924d1abf986079b783dd105ace <232ed9752510de4436468b653d145565669c8498 || >=c74a3bdd9b529d924d1abf986079b783dd105ace <7623b1035ca2d17bde0f6a086ad6844a34648df1 || >=c74a3bdd9b529d924d1abf986079b783dd105ace <d3a83576378b4c904f711598dde2c5e881c4295c || >=c74a3bdd9b529d924d1abf986079b783dd105ace <93be0eeea14cf39235e585c8f56df3b3859deaad || >=c74a3bdd9b529d924d1abf986079b783dd105ace <0e677ea5b7396f715a76b6b0ef441430e4c4b57f || >=c74a3bdd9b529d924d1abf986079b783dd105ace <b15fa9224e6e1239414525d8d556d824701849fc | ac011cb3ff7a76b3e0e6e77158ee4ba2f929e1fb, 4b74ddcc22ee6455946e80a9c4808801f8f8561e, 232ed9752510de4436468b653d145565669c8498, 7623b1035ca2d17bde0f6a086ad6844a34648df1, d3a83576378b4c904f711598dde2c5e881c4295c, 93be0eeea14cf39235e585c8f56df3b3859deaad, 0e677ea5b7396f715a76b6b0ef441430e4c4b57f, b15fa9224e6e1239414525d8d556d824701849fc |
| Linux/Linuxgeneric | 3.14 | Not reported |
Published upstream
May 22, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
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
Quoted source text, attributed separately from HOL analysis.