CVE-2021-47500— iio: mma8452: Fix trigger reference couting
Affected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | ae6d9ce05691bf79694074db7c7da980080548af< 094d513b78b1714113bc016684b8142382e071ba | affected |
ae6d9ce05691bf79694074db7c7da980080548af< fb75cc4740d81264cd5bcb0e17d961d018a8be96 | affected | ||
ae6d9ce05691bf79694074db7c7da980080548af< 794c0898f6bf39a458655d5fb4af70ec43a5cfcb | affected | ||
ae6d9ce05691bf79694074db7c7da980080548af< f5deab10ced368c807866283f8b79144c4823be8 | affected | ||
ae6d9ce05691bf79694074db7c7da980080548af< acf0088ac073ca6e7f4cad6acac112177e08df5e | affected | ||
ae6d9ce05691bf79694074db7c7da980080548af< db12d95085367de8b0223929d1332731024441f1 | affected | ||
ae6d9ce05691bf79694074db7c7da980080548af< c43517071dfc9fce34f8f69dbb98a86017f6b739 | affected | ||
ae6d9ce05691bf79694074db7c7da980080548af< cd0082235783f814241a1c9483fb89e405f4f892 | affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2021-47500
Vulnerability Information
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Vulnerability Title
iio: mma8452: Fix trigger reference couting
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: iio: mma8452: Fix trigger reference couting The mma8452 driver directly assigns a trigger to the struct iio_dev. The IIO core when done using this trigger will call `iio_trigger_put()` to drop the reference count by 1. Without the matching `iio_trigger_get()` in the driver the reference count can reach 0 too early, the trigger gets freed while still in use and a use-after-free occurs. Fix this by getting a reference to the trigger before assigning it to the IIO device.
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，该漏洞源于内存释放后重用。
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-2021-47500
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2021-47500 (6)
Same Patch Batch · Linux · 2024-05-24 · 73 CVEs total
| CVE-2021-47549 | sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl | |
| CVE-2021-47569 | io_uring: fail cancellation for EXITING tasks | |
| CVE-2021-47567 | powerpc/32: Fix hardlockup on vmap stack overflow | |
| CVE-2021-47554 | vdpa_sim: avoid putting an uninitialized iova_domain | |
| CVE-2021-47555 | net: vlan: fix underflow for the real_dev refcnt | |
| CVE-2021-47553 | sched/scs: Reset task stack state in bringup_cpu() | |
| CVE-2021-47551 | drm/amd/amdkfd: Fix kernel panic when reset failed and been triggered again | |
| CVE-2021-47552 | blk-mq: cancel blk-mq dispatch work in both blk_cleanup_queue and disk_release() | |
| CVE-2021-47550 | drm/amd/amdgpu: fix potential memleak | |
| CVE-2021-47548 | ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst | |
| CVE-2021-47556 | ethtool: ioctl: fix potential NULL deref in ethtool_set_coalesce() | |
| CVE-2021-47547 | net: tulip: de4x5: fix the problem that the array 'lp->phy[8]' may be out of bound | |
| CVE-2021-47546 | ipv6: fix memory leak in fib6_rule_suppress | |
| CVE-2021-47544 | tcp: fix page frag corruption on page fault | |
| CVE-2021-47542 | net: qlogic: qlcnic: Fix a NULL pointer dereference in qlcnic_83xx_add_rings() | |
| CVE-2021-47541 | net/mlx4_en: Fix an use-after-free bug in mlx4_en_try_alloc_resources() | |
| CVE-2021-47540 | mt76: mt7915: fix NULL pointer dereference in mt7915_get_phy_mode | |
| CVE-2021-47539 | rxrpc: Fix rxrpc_peer leak in rxrpc_look_up_bundle() | |
| CVE-2021-47538 | rxrpc: Fix rxrpc_local leak in rxrpc_lookup_peer() | |
| CVE-2021-47536 | net/smc: fix wrong list_del in smc_lgr_cleanup_early |
Showing top 20 of 73 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-45846
bareudp: fix NULL pointer dereference in bareudp_fill_metada - CVE-2026-45845
net/sched: taprio: fix NULL pointer dereference in class dum - CVE-2026-45844
netfilter: arp_tables: fix IEEE1394 ARP payload parsing - CVE-2026-45843
slip: bound decode() reads against the compressed packet len - CVE-2026-45842
slip: reject VJ receive packets on instances with no rstate
Same vendor: Linux
- CVE-2026-45846
bareudp: fix NULL pointer dereference in bareudp_fill_metada - CVE-2026-45845
net/sched: taprio: fix NULL pointer dereference in class dum - CVE-2026-45844
netfilter: arp_tables: fix IEEE1394 ARP payload parsing - CVE-2026-45843
slip: bound decode() reads against the compressed packet len - CVE-2026-45842
slip: reject VJ receive packets on instances with no rstate
V. Comments for CVE-2021-47500
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