CVE-2021-47631
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)
ARM: davinci: da850-evm: Avoid NULL pointer dereference
In the Linux kernel, the following vulnerability has been resolved: ARM: davinci: da850-evm: Avoid NULL pointer dereference With newer versions of GCC, there is a panic in da850_evm_config_emac() when booting multi_v5_defconfig in QEMU under the palmetto-bmc machine: Unable to handle kernel NULL pointer dereference at virtual address 00000020 pgd = (ptrval) [00000020] *pgd=00000000 Internal error: Oops: 5 [#1] PREEMPT ARM Modules linked in: CPU: 0 PID: 1 Comm: swapper Not tainted 5.15.0 #1 Hardware name: Generic DT based system PC is at da850_evm_config_emac+0x1c/0x120 LR is at do_one_initcall+0x50/0x1e0 The emac_pdata pointer in soc_info is NULL because davinci_soc_info only gets populated on davinci machines but da850_evm_config_emac() is called on all machines via device_initcall(). Move the rmii_en assignment below the machine check so that it is only dereferenced when running on a supported SoC.
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) |
|---|---|---|---|---|---|
| bae105879f2f2404155da6f50b3636193d228a62 | affected | git | c06f476e5b74bcabb8c4a2fba55864a37e62843b | Unavailable | None listed |
| bae105879f2f2404155da6f50b3636193d228a62 | affected | git | a12b356d45cbb6e8a1b718d1436b3d6239a862f3 | Unavailable | None listed |
| bae105879f2f2404155da6f50b3636193d228a62 | affected | git | c64e2ed5cc376e137e572babfd2edc38b2cfb61b | Unavailable | None listed |
| bae105879f2f2404155da6f50b3636193d228a62 | affected | git | 89931d4762572aaee6edbe5673d41f8082de110f | Unavailable | None listed |
| bae105879f2f2404155da6f50b3636193d228a62 | affected | git | 0a312ec66a03133d28570f07bc52749ccfef54da | Unavailable | None listed |
| bae105879f2f2404155da6f50b3636193d228a62 | affected | git | 0940795c6834fbe7705acc5c3d4b2f7a5f67527a | Unavailable | None listed |
| bae105879f2f2404155da6f50b3636193d228a62 | affected | git | c5628533a3ece64235d04fe11ec44d2be99e423d | Unavailable | None listed |
| bae105879f2f2404155da6f50b3636193d228a62 | affected | git | 83a1cde5c74bfb44b49cb2a940d044bb2380f4ea | 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) |
|---|---|---|---|---|---|
| 2.6.33 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.33 | Unavailable | None listed |
| 4.9.311 | unaffected | semver | Unavailable | 4.9.* | None listed |
| 4.14.276 | unaffected | semver | Unavailable | 4.14.* | None listed |
| 4.19.239 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.190 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.112 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.35 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 5.17.4 | unaffected | semver | Unavailable | 5.17.* | None listed |
| 5.18 | unaffected | original_commit_for_fix | Unavailable | * | None listed |