CVE-2021-47427— scsi: iscsi: Fix iscsi_task use after free
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 6
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I. Basic Information for CVE-2021-47427
Vulnerability Information
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Vulnerability Title
scsi: iscsi: Fix iscsi_task use after free
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: scsi: iscsi: Fix iscsi_task use after free Commit d39df158518c ("scsi: iscsi: Have abort handler get ref to conn") added iscsi_get_conn()/iscsi_put_conn() calls during abort handling but then also changed the handling of the case where we detect an already completed task where we now end up doing a goto to the common put/cleanup code. This results in a iscsi_task use after free, because the common cleanup code will do a put on the iscsi_task. This reverts the goto and moves the iscsi_get_conn() to after we've checked if the iscsi_task is valid.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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scsi:iscsi模块存在释放后重用漏洞。
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-2021-47427
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Other References for CVE-2021-47427 (2)
Same Patch Batch · Linux · 2024-05-21 · 361 CVEs total
| CVE-2023-52732 | 9.8 CRITICAL | ceph: blocklist the kclient when receiving corrupted snap trace |
| CVE-2023-52755 | 9.8 CRITICAL | ksmbd: fix slab out of bounds write in smb_inherit_dacl() |
| CVE-2021-47378 | 9.8 CRITICAL | nvme-rdma: destroy cm id before destroy qp to avoid use after free |
| CVE-2021-47328 | 9.8 CRITICAL | scsi: iscsi: Fix conn use after free during resets |
| CVE-2021-47232 | 9.8 CRITICAL | can: j1939: fix Use-after-Free, hold skb ref while in use |
| CVE-2023-52741 | 9.8 CRITICAL | cifs: Fix use-after-free in rdata->read_into_pages() |
| CVE-2023-52776 | 8.8 HIGH | wifi: ath12k: fix dfs-radar and temperature event locking |
| CVE-2021-47308 | 8.8 HIGH | scsi: libfc: Fix array index out of bound exception |
| CVE-2023-52801 | 8.8 HIGH | iommufd: Fix missing update of domains_itree after splitting iopt_area |
| CVE-2021-47388 | 8.8 HIGH | mac80211: fix use-after-free in CCMP/GCMP RX |
| CVE-2023-52798 | 8.8 HIGH | wifi: ath11k: fix dfs radar event locking |
| CVE-2021-47390 | 8.8 HIGH | KVM: x86: Fix stack-out-of-bounds memory access from ioapic_write_indirect() |
| CVE-2023-52846 | 8.8 HIGH | hsr: Prevent use after free in prp_create_tagged_frame() |
| CVE-2023-52769 | 8.8 HIGH | wifi: ath12k: fix htt mlo-offset event locking |
| CVE-2023-52790 | 8.8 HIGH | swiotlb: fix out-of-bounds TLB allocations with CONFIG_SWIOTLB_DYNAMIC |
| CVE-2021-47240 | 8.4 HIGH | net: qrtr: fix OOB Read in qrtr_endpoint_post |
| CVE-2023-52829 | 8.4 HIGH | wifi: ath12k: fix possible out-of-bound write in ath12k_wmi_ext_hal_reg_caps() |
| CVE-2021-47352 | 8.4 HIGH | virtio-net: Add validation for used length |
| CVE-2021-47244 | 8.2 HIGH | mptcp: Fix out of bounds when parsing TCP options |
| CVE-2021-47245 | 8.2 HIGH | netfilter: synproxy: Fix out of bounds when parsing TCP options |
Showing top 20 of 361 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
Same vendor: Linux
- CVE-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
V. Comments for CVE-2021-47427
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