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CVE-2021-4441— spi: spi-zynq-qspi: Fix a NULL pointer dereference in zynq_qspi_exec_mem_op()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于空指针取消引用。

AI Predicted 3.3 Difficulty: Theoretical EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 67dca5e580f1e93a66177389981541cac208c817< df14d2bed8e2455878e046e67123d9ecb2e79056 affected
67dca5e580f1e93a66177389981541cac208c817< 2efece1368aeee2d2552c7ec36aeb676c4d4c95f affected
67dca5e580f1e93a66177389981541cac208c817< 3c32405d6474a21f7d742828e73c13e326dcae82 affected
67dca5e580f1e93a66177389981541cac208c817< b9dd08cbebe0c593c49bf86d2012a431494e54cb affected
67dca5e580f1e93a66177389981541cac208c817< ab3824427b848da10e9fe2727f035bbeecae6ff4 affected
5.2 affected
< 5.2 unaffected
5.4.182≤ 5.4.* unaffected
… +4 more rows
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I. Basic Information for CVE-2021-4441

Vulnerability Information
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Vulnerability Title
spi: spi-zynq-qspi: Fix a NULL pointer dereference in zynq_qspi_exec_mem_op()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: spi: spi-zynq-qspi: Fix a NULL pointer dereference in zynq_qspi_exec_mem_op() In zynq_qspi_exec_mem_op(), kzalloc() is directly used in memset(), which could lead to a NULL pointer dereference on failure of kzalloc(). Fix this bug by adding a check of tmpbuf. This bug was found by a static analyzer. The analysis employs differential checking to identify inconsistent security operations (e.g., checks or kfrees) between two code paths and confirms that the inconsistent operations are not recovered in the current function or the callers, so they constitute bugs. Note that, as a bug found by static analysis, it can be a false positive or hard to trigger. Multiple researchers have cross-reviewed the bug. Builds with CONFIG_SPI_ZYNQ_QSPI=m show no new warnings, and our static analyzer no longer warns about this code.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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，该漏洞源于空指针取消引用。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 67dca5e580f1e93a66177389981541cac208c817 ~ df14d2bed8e2455878e046e67123d9ecb2e79056 -
Linux Linux 5.2 -

II. Public POCs for CVE-2021-4441

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III. Intelligence Information for CVE-2021-4441

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Other References for CVE-2021-4441 (5)

Same Patch Batch · Linux · 2024-08-22 · 42 CVEs total

CVE-2022-48941 8.8 HIGH ice: fix concurrent reset and removal of VFs
CVE-2022-48919 8.8 HIGH cifs: fix double free race when mount fails in cifs_get_root()
CVE-2022-48925 7.8 HIGH RDMA/cma: Do not change route.addr.src_addr outside state checks
CVE-2022-48923 7.8 HIGH btrfs: prevent copying too big compressed lzo segment
CVE-2022-48927 7.8 HIGH iio: adc: tsc2046: fix memory corruption by preventing array overflow
CVE-2022-48913 7.8 HIGH blktrace: fix use after free for struct blk_trace
CVE-2022-48912 7.8 HIGH netfilter: fix use-after-free in __nf_register_net_hook()
CVE-2022-48911 7.8 HIGH netfilter: nf_queue: fix possible use-after-free
CVE-2022-48932 7.8 HIGH net/mlx5: DR, Fix slab-out-of-bounds in mlx5_cmd_dr_create_fte
CVE-2022-48935 7.8 HIGH netfilter: nf_tables: unregister flowtable hooks on netns exit
CVE-2022-48940 7.8 HIGH bpf: Fix crash due to incorrect copy_map_value
CVE-2022-48943 7.1 HIGH KVM: x86/mmu: make apf token non-zero to fix bug
CVE-2022-48933 netfilter: nf_tables: fix memory leak during stateful obj update
CVE-2022-48934 nfp: flower: Fix a potential leak in nfp_tunnel_add_shared_mac()
CVE-2022-48937 io_uring: add a schedule point in io_add_buffers()
CVE-2022-48931 configfs: fix a race in configfs_{,un}register_subsystem()
CVE-2022-48930 RDMA/ib_srp: Fix a deadlock
CVE-2022-48929 bpf: Fix crash due to out of bounds access into reg2btf_ids.
CVE-2022-48928 iio: adc: men_z188_adc: Fix a resource leak in an error handling path
CVE-2022-48938 CDC-NCM: avoid overflow in sanity checking

Showing top 20 of 42 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-4441

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