CVE-2021-47631: ARM: davinci: da850-evm: Avoid NULL pointer dereference
Noroxi assessment
Priority: Monitor (action score 22/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.24% (FIRST EPSS).
- Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: Linux Linux 0940795c6834fbe7705acc5c3d4b2f7a5f67527a, 0a312ec66a03133d28570f07bc52749ccfef54da, 83a1cde5c74bfb44b49cb2a940d044bb2380f4ea.
Low priority for now. Upgrade to Linux Linux 0940795c6834fbe7705acc5c3d4b2f7a5f67527a, 0a312ec66a03133d28570f07bc52749ccfef54da, 83a1cde5c74bfb44b49cb2a940d044bb2380f4ea or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- Published
- Feb 26, 2025
- Updated
- Jun 17, 2026
- EPSS
- 0.2% · 15th percentile
- CWE
- CWE-476
Report tools
Action score
22
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Is your version affected? Check itNoroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 2.6.33affected
- bae105879f2f2404155da6f50b3636193d228a62 and later · before c06f476e5b74bcabb8c4a2fba55864a37e62843baffected · git
- bae105879f2f2404155da6f50b3636193d228a62 and later · before a12b356d45cbb6e8a1b718d1436b3d6239a862f3affected · git
- bae105879f2f2404155da6f50b3636193d228a62 and later · before c64e2ed5cc376e137e572babfd2edc38b2cfb61baffected · git
- bae105879f2f2404155da6f50b3636193d228a62 and later · before 89931d4762572aaee6edbe5673d41f8082de110faffected · git
- bae105879f2f2404155da6f50b3636193d228a62 and later · before 0a312ec66a03133d28570f07bc52749ccfef54daaffected · git
- bae105879f2f2404155da6f50b3636193d228a62 and later · before 0940795c6834fbe7705acc5c3d4b2f7a5f67527aaffected · git
- bae105879f2f2404155da6f50b3636193d228a62 and later · before c5628533a3ece64235d04fe11ec44d2be99e423daffected · git
- bae105879f2f2404155da6f50b3636193d228a62 and later · before 83a1cde5c74bfb44b49cb2a940d044bb2380f4eaaffected · git
- before 2.6.33not affected · semver
Affected versions · NVD (8)
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel2.6.33 and later · before 4.9.311
- linux linux kernel4.10 and later · before 4.14.276
- linux linux kernel4.15 and later · before 4.19.239
- linux linux kernel4.20 and later · before 5.4.190
- linux linux kernel5.5 and later · before 5.10.112
- linux linux kernel5.11 and later · before 5.15.35
- linux linux kernel5.16 and later · before 5.17.4
- linux linux kernel5.18
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 5.17.6-1 | 5.17.6-1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-64kb | before 5.3.18-150300.59.201.1 | 5.3.18-150300.59.201.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-default-base | before 5.3.18-150300.59.201.1.150300.18.120.1 | 5.3.18-150300.59.201.1.150300.18.120.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-docs | before 5.3.18-150300.59.201.1 | 5.3.18-150300.59.201.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-obs-build | before 5.3.18-150300.59.201.1 | 5.3.18-150300.59.201.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-preempt | before 5.3.18-150300.59.201.1 | 5.3.18-150300.59.201.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-source | before 5.3.18-150300.59.201.1 | 5.3.18-150300.59.201.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-syms | before 5.3.18-150300.59.201.1 | 5.3.18-150300.59.201.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-64kb | before 5.14.21-150400.24.158.1 | 5.14.21-150400.24.158.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-docs | before 5.14.21-150400.24.158.1 | 5.14.21-150400.24.158.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-obs-build | before 5.14.21-150400.24.158.1 | 5.14.21-150400.24.158.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-source | before 5.14.21-150400.24.158.1 | 5.14.21-150400.24.158.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-syms | before 5.14.21-150400.24.158.1 | 5.14.21-150400.24.158.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | kernel-64kb | before 5.14.21-150500.55.100.1 | 5.14.21-150500.55.100.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | kernel-docs | before 5.14.21-150500.55.100.1 | 5.14.21-150500.55.100.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | kernel-obs-build | before 5.14.21-150500.55.100.1 | 5.14.21-150500.55.100.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | kernel-syms | before 5.14.21-150500.55.100.1 | 5.14.21-150500.55.100.1 |
| SUSE:Linux Enterprise Live Patching 15 SP3 | kernel-default | before 5.3.18-150300.59.201.1 | 5.3.18-150300.59.201.1 |
| SUSE:Linux Enterprise Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_56 | before 1-150300.7.3.1 | 1-150300.7.3.1 |
| SUSE:Linux Enterprise Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_38 | before 1-150400.9.3.1 | 1-150400.9.3.1 |
| SUSE:Linux Enterprise Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_25 | before 1-150500.11.3.1 | 1-150500.11.3.1 |
| SUSE:Linux Enterprise Micro 5.1 | kernel-rt | before 5.3.18-150300.205.1 | 5.3.18-150300.205.1 |
| SUSE:Linux Enterprise Micro 5.1 | kernel-source-rt | before 5.3.18-150300.205.1 | 5.3.18-150300.205.1 |
| SUSE:Linux Enterprise Micro 5.3 | kernel-default | before 5.14.21-150400.24.158.1 | 5.14.21-150400.24.158.1 |
+11
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2025-21704Feb 22, 2025 · usb: cdc-acm: Check control transfer buffer size before access31Monitor
- ← EarlierCVE-2023-52926Feb 24, 2025 · io_uring/rw: split io_read() into a helper31Monitor
- Later →CVE-2021-47632Feb 26, 2025 · powerpc/set_memory: Avoid spinlock recursion in change_page_attr()22Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 0940795c6834fbe7705acc5c3d4b2f7a5f67527a | Vendor (CNA) |
| Linux Linux | 0a312ec66a03133d28570f07bc52749ccfef54da | Vendor (CNA) |
| Linux Linux | 83a1cde5c74bfb44b49cb2a940d044bb2380f4ea | Vendor (CNA) |
| Linux Linux | 89931d4762572aaee6edbe5673d41f8082de110f | Vendor (CNA) |
| Linux Linux | a12b356d45cbb6e8a1b718d1436b3d6239a862f3 | Vendor (CNA) |
| Linux Linux | c06f476e5b74bcabb8c4a2fba55864a37e62843b | Vendor (CNA) |
| Linux Linux | c5628533a3ece64235d04fe11ec44d2be99e423d | Vendor (CNA) |
| Linux Linux | c64e2ed5cc376e137e572babfd2edc38b2cfb61b | Vendor (CNA) |
| debian:linux | 5.17.6-1 · Debian:12 | Package registry (OSV) |
| suse:kernel-64kb | 5.14.21-150400.24.158.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | Package registry (OSV) |
| suse:kernel-default | 5.14.21-150400.24.158.1 · SUSE:Linux Enterprise Micro 5.3 | Package registry (OSV) |
| suse:kernel-default-base | 5.14.21-150400.24.158.1.150400.24.78.1 · SUSE:Linux Enterprise Micro 5.3 | Package registry (OSV) |
| suse:kernel-docs | 5.14.21-150400.24.158.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP4_Update_38 | 1-150400.9.3.1 · SUSE:Linux Enterprise Live Patching 15 SP4 | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP5_Update_25 | 1-150500.11.3.1 · SUSE:Linux Enterprise Live Patching 15 SP5 | Package registry (OSV) |
| suse:kernel-obs-build | 5.14.21-150400.24.158.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | Package registry (OSV) |
| suse:kernel-rt | 5.14.21-150500.13.91.1 · SUSE:Linux Enterprise Micro 5.5 | Package registry (OSV) |
| suse:kernel-source | 5.14.21-150400.24.158.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | Package registry (OSV) |
| suse:kernel-source-rt | 5.14.21-150500.13.91.1 · SUSE:Linux Enterprise Micro 5.5 | Package registry (OSV) |
| suse:kernel-syms | 5.14.21-150400.24.158.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | Package registry (OSV) |
| suse:kernel-zfcpdump | 5.14.21-150400.24.158.1 · SUSE:Linux Enterprise Server 15 SP4-LTSS | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-476 · NULL Pointer DereferenceCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log (1)
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (7 more)Show less
- git.kernel.org/stable/c/0a312ec66a03133d28570f07bc52749ccfef54da
- git.kernel.org/stable/c/83a1cde5c74bfb44b49cb2a940d044bb2380f4ea
- git.kernel.org/stable/c/89931d4762572aaee6edbe5673d41f8082de110f
- git.kernel.org/stable/c/a12b356d45cbb6e8a1b718d1436b3d6239a862f3
- git.kernel.org/stable/c/c06f476e5b74bcabb8c4a2fba55864a37e62843b
- git.kernel.org/stable/c/c5628533a3ece64235d04fe11ec44d2be99e423d
- git.kernel.org/stable/c/c64e2ed5cc376e137e572babfd2edc38b2cfb61b
Vendor advisories and official records. Exploit/PoC links are deliberately left out.