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CVE-2021-47412— block: don't call rq_qos_ops->done_bio if the bio isn't tracked

CVSS 7.8 · High EPSS 0.23% · P14

Possible ATT&CK Techniques 1AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 8

VendorProductVersion RangeStatus
LinuxLinux67b42d0bf7a8fd1ec0cf1acdc9550e688d7c8578< db60edbfff332a6a5477c367af8125f034570989affected
67b42d0bf7a8fd1ec0cf1acdc9550e688d7c8578< 004b8f8a691205a93d9e80d98b786b2b97424d6eaffected
67b42d0bf7a8fd1ec0cf1acdc9550e688d7c8578< a647a524a46736786c95cdb553a070322ca096e3affected
4.19affected
< 4.19unaffected
5.10.241≤ 5.10.*unaffected
5.14.11≤ 5.14.*unaffected
5.15≤ *unaffected
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I. Basic Information for CVE-2021-47412

Vulnerability Information
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Vulnerability Title
block: don't call rq_qos_ops->done_bio if the bio isn't tracked
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: block: don't call rq_qos_ops->done_bio if the bio isn't tracked rq_qos framework is only applied on request based driver, so: 1) rq_qos_done_bio() needn't to be called for bio based driver 2) rq_qos_done_bio() needn't to be called for bio which isn't tracked, such as bios ended from error handling code. Especially in bio_endio(): 1) request queue is referred via bio->bi_bdev->bd_disk->queue, which may be gone since request queue refcount may not be held in above two cases 2) q->rq_qos may be freed in blk_cleanup_queue() when calling into __rq_qos_done_bio() Fix the potential kernel panic by not calling rq_qos_ops->done_bio if the bio isn't tracked. This way is safe because both ioc_rqos_done_bio() and blkcg_iolatency_done_bio() are nop if the bio isn't tracked.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/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block模块存在漏洞。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 67b42d0bf7a8fd1ec0cf1acdc9550e688d7c8578 ~ db60edbfff332a6a5477c367af8125f034570989 -
LinuxLinux 4.19 -

II. Public POCs for CVE-2021-47412

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III. Intelligence Information for CVE-2021-47412

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Other References for CVE-2021-47412 (2)

Same Patch Batch · Linux · 2024-05-21 · 361 CVEs total

CVE-2023-527329.8 CRITICALceph: blocklist the kclient when receiving corrupted snap trace
CVE-2023-527559.8 CRITICALksmbd: fix slab out of bounds write in smb_inherit_dacl()
CVE-2021-473789.8 CRITICALnvme-rdma: destroy cm id before destroy qp to avoid use after free
CVE-2021-473289.8 CRITICALscsi: iscsi: Fix conn use after free during resets
CVE-2021-472329.8 CRITICALcan: j1939: fix Use-after-Free, hold skb ref while in use
CVE-2023-527419.8 CRITICALcifs: Fix use-after-free in rdata->read_into_pages()
CVE-2021-474279.8 CRITICALscsi: iscsi: Fix iscsi_task use after free
CVE-2023-527768.8 HIGHwifi: ath12k: fix dfs-radar and temperature event locking
CVE-2021-473088.8 HIGHscsi: libfc: Fix array index out of bound exception
CVE-2023-528018.8 HIGHiommufd: Fix missing update of domains_itree after splitting iopt_area
CVE-2021-473888.8 HIGHmac80211: fix use-after-free in CCMP/GCMP RX
CVE-2023-527988.8 HIGHwifi: ath11k: fix dfs radar event locking
CVE-2021-473908.8 HIGHKVM: x86: Fix stack-out-of-bounds memory access from ioapic_write_indirect()
CVE-2023-527908.8 HIGHswiotlb: fix out-of-bounds TLB allocations with CONFIG_SWIOTLB_DYNAMIC
CVE-2023-527698.8 HIGHwifi: ath12k: fix htt mlo-offset event locking
CVE-2023-528468.8 HIGHhsr: Prevent use after free in prp_create_tagged_frame()
CVE-2021-472408.4 HIGHnet: qrtr: fix OOB Read in qrtr_endpoint_post
CVE-2021-473528.4 HIGHvirtio-net: Add validation for used length
CVE-2023-528298.4 HIGHwifi: ath12k: fix possible out-of-bound write in ath12k_wmi_ext_hal_reg_caps()
CVE-2021-472458.2 HIGHnetfilter: synproxy: Fix out of bounds when parsing TCP options

Showing top 20 of 361 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47412

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