CVE-2021-47458— ocfs2: mount fails with buffer overflow in strlen
Affected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | c74a3bdd9b529d924d1abf986079b783dd105ace< ac011cb3ff7a76b3e0e6e77158ee4ba2f929e1fb | affected |
c74a3bdd9b529d924d1abf986079b783dd105ace< 4b74ddcc22ee6455946e80a9c4808801f8f8561e | affected | ||
c74a3bdd9b529d924d1abf986079b783dd105ace< 232ed9752510de4436468b653d145565669c8498 | affected | ||
c74a3bdd9b529d924d1abf986079b783dd105ace< 7623b1035ca2d17bde0f6a086ad6844a34648df1 | affected | ||
c74a3bdd9b529d924d1abf986079b783dd105ace< d3a83576378b4c904f711598dde2c5e881c4295c | affected | ||
c74a3bdd9b529d924d1abf986079b783dd105ace< 93be0eeea14cf39235e585c8f56df3b3859deaad | affected | ||
c74a3bdd9b529d924d1abf986079b783dd105ace< 0e677ea5b7396f715a76b6b0ef441430e4c4b57f | affected | ||
c74a3bdd9b529d924d1abf986079b783dd105ace< b15fa9224e6e1239414525d8d556d824701849fc | affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2021-47458
Vulnerability Information
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Vulnerability Title
ocfs2: mount fails with buffer overflow in strlen
Source: NVD (National Vulnerability Database)
Vulnerability 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
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于存在缓冲区溢出漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2021-47458
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2021-47458 (8)
Same Patch Batch · Linux · 2024-05-22 · 63 CVEs total
| CVE-2021-47477 | comedi: dt9812: fix DMA buffers on stack | |
| CVE-2021-47493 | ocfs2: fix race between searching chunks and release journal_head from buffer_head | |
| CVE-2021-47495 | usbnet: sanity check for maxpacket | |
| CVE-2021-47496 | net/tls: Fix flipped sign in tls_err_abort() calls | |
| CVE-2021-47494 | cfg80211: fix management registrations locking | |
| CVE-2021-47481 | RDMA/mlx5: Initialize the ODP xarray when creating an ODP MR | |
| CVE-2021-47482 | net: batman-adv: fix error handling | |
| CVE-2021-47480 | scsi: core: Put LLD module refcnt after SCSI device is released | |
| CVE-2021-47478 | isofs: Fix out of bound access for corrupted isofs image | |
| CVE-2021-47479 | staging: rtl8712: fix use-after-free in rtl8712_dl_fw | |
| CVE-2021-47483 | regmap: Fix possible double-free in regcache_rbtree_exit() | |
| CVE-2021-47476 | comedi: ni_usb6501: fix NULL-deref in command paths | |
| CVE-2021-47475 | comedi: vmk80xx: fix transfer-buffer overflows | |
| CVE-2021-47474 | comedi: vmk80xx: fix bulk-buffer overflow | |
| CVE-2021-47473 | scsi: qla2xxx: Fix a memory leak in an error path of qla2x00_process_els() | |
| CVE-2021-47471 | drm: mxsfb: Fix NULL pointer dereference crash on unload | |
| CVE-2021-47470 | mm, slub: fix potential use-after-free in slab_debugfs_fops | |
| CVE-2021-47468 | isdn: mISDN: Fix sleeping function called from invalid context | |
| CVE-2021-47467 | kunit: fix reference count leak in kfree_at_end | |
| CVE-2021-47466 | mm, slub: fix potential memoryleak in kmem_cache_open() |
Showing top 20 of 63 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing - CVE-2026-43503
net: skbuff: propagate shared-frag marker through frag-trans - CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects
Same vendor: Linux
- CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing - CVE-2026-43503
net: skbuff: propagate shared-frag marker through frag-trans - CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects
V. Comments for CVE-2021-47458
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