CVE-2021-4441— spi: spi-zynq-qspi: Fix a NULL pointer dereference in zynq_qspi_exec_mem_op()
Affected Version Matrix 12
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 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: NVD (National Vulnerability Database)
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: 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
II. Public POCs for CVE-2021-4441
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|---|
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Same Patch Batch · Linux · 2024-08-22 · 42 CVEs total
| CVE-2022-48931 | configfs: fix a race in configfs_{,un}register_subsystem() | |
| CVE-2022-48923 | btrfs: prevent copying too big compressed lzo segment | |
| CVE-2022-48924 | thermal: int340x: fix memory leak in int3400_notify() | |
| CVE-2022-48925 | RDMA/cma: Do not change route.addr.src_addr outside state checks | |
| CVE-2022-48942 | hwmon: Handle failure to register sensor with thermal zone correctly | |
| CVE-2022-48943 | KVM: x86/mmu: make apf token non-zero to fix bug | |
| CVE-2022-48926 | usb: gadget: rndis: add spinlock for rndis response list | |
| CVE-2022-48927 | iio: adc: tsc2046: fix memory corruption by preventing array overflow | |
| CVE-2022-48928 | iio: adc: men_z188_adc: Fix a resource leak in an error handling path | |
| CVE-2022-48929 | bpf: Fix crash due to out of bounds access into reg2btf_ids. | |
| CVE-2022-48930 | RDMA/ib_srp: Fix a deadlock | |
| CVE-2022-48922 | riscv: fix oops caused by irqsoff latency tracer | |
| CVE-2022-48932 | net/mlx5: DR, Fix slab-out-of-bounds in mlx5_cmd_dr_create_fte | |
| 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-2022-48935 | netfilter: nf_tables: unregister flowtable hooks on netns exit | |
| CVE-2022-48937 | io_uring: add a schedule point in io_add_buffers() | |
| CVE-2022-48938 | CDC-NCM: avoid overflow in sanity checking | |
| CVE-2022-48939 | bpf: Add schedule points in batch ops | |
| CVE-2022-48940 | bpf: Fix crash due to incorrect copy_map_value |
Showing top 20 of 42 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43492
lib/crypto: mpi: Fix integer underflow in mpi_read_raw_from_ - CVE-2026-43493
crypto: pcrypt - Fix handling of MAY_BACKLOG requests - CVE-2026-43491
net: qrtr: ns: Limit the maximum server registration per nod - CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length
Same vendor: Linux
- CVE-2026-43492
lib/crypto: mpi: Fix integer underflow in mpi_read_raw_from_ - CVE-2026-43493
crypto: pcrypt - Fix handling of MAY_BACKLOG requests - CVE-2026-43491
net: qrtr: ns: Limit the maximum server registration per nod - CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length
V. Comments for CVE-2021-4441
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