CVE-2021-4441
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
spi: spi-zynq-qspi: Fix a NULL pointer dereference in zynq_qspi_exec_mem_op()
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 67dca5e580f1e93a66177389981541cac208c817 | affected | git | df14d2bed8e2455878e046e67123d9ecb2e79056 | Unavailable | None listed |
| 67dca5e580f1e93a66177389981541cac208c817 | affected | git | 2efece1368aeee2d2552c7ec36aeb676c4d4c95f | Unavailable | None listed |
| 67dca5e580f1e93a66177389981541cac208c817 | affected | git | 3c32405d6474a21f7d742828e73c13e326dcae82 | Unavailable | None listed |
| 67dca5e580f1e93a66177389981541cac208c817 | affected | git | b9dd08cbebe0c593c49bf86d2012a431494e54cb | Unavailable | None listed |
| 67dca5e580f1e93a66177389981541cac208c817 | affected | git | ab3824427b848da10e9fe2727f035bbeecae6ff4 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.2 | Unavailable | None listed |
| 5.4.182 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.103 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.26 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 5.16.12 | unaffected | semver | Unavailable | 5.16.* | None listed |
| 5.17 | unaffected | original_commit_for_fix | Unavailable | * | None listed |