Vulnerability-Lookup

EUVD-2026-309741

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 07:09

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T07:09:58.687642+00:00",
  "id": "EUVD-2026-309741"
}

CVE-2021-47440 (GCVE-0-2021-47440)

Vulnerability from cvelistv5 – Published: 2024-05-22 06:19 – Updated: 2026-05-11 13:54

Title

net: encx24j600: check error in devm_regmap_init_encx24j600

Summary

In the Linux kernel, the following vulnerability has been resolved: net: encx24j600: check error in devm_regmap_init_encx24j600 devm_regmap_init may return error which caused by like out of memory, this will results in null pointer dereference later when reading or writing register: general protection fault in encx24j600_spi_probe KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097] CPU: 0 PID: 286 Comm: spi-encx24j600- Not tainted 5.15.0-rc2-00142-g9978db750e31-dirty #11 9c53a778c1306b1b02359f3c2bbedc0222cba652 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:regcache_cache_bypass drivers/base/regmap/regcache.c:540 Code: 54 41 89 f4 55 53 48 89 fb 48 83 ec 08 e8 26 94 a8 fe 48 8d bb a0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 4a 03 00 00 4c 8d ab b0 00 00 00 48 8b ab a0 00 RSP: 0018:ffffc900010476b8 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: 0000000000000000 RDX: 0000000000000012 RSI: ffff888002de0000 RDI: 0000000000000094 RBP: ffff888013c9a000 R08: 0000000000000000 R09: fffffbfff3f9cc6a R10: ffffc900010476e8 R11: fffffbfff3f9cc69 R12: 0000000000000001 R13: 000000000000000a R14: ffff888013c9af54 R15: ffff888013c9ad08 FS: 00007ffa984ab580(0000) GS:ffff88801fe00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055a6384136c8 CR3: 000000003bbe6003 CR4: 0000000000770ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: encx24j600_spi_probe drivers/net/ethernet/microchip/encx24j600.c:459 spi_probe drivers/spi/spi.c:397 really_probe drivers/base/dd.c:517 __driver_probe_device drivers/base/dd.c:751 driver_probe_device drivers/base/dd.c:782 __device_attach_driver drivers/base/dd.c:899 bus_for_each_drv drivers/base/bus.c:427 __device_attach drivers/base/dd.c:971 bus_probe_device drivers/base/bus.c:487 device_add drivers/base/core.c:3364 __spi_add_device drivers/spi/spi.c:599 spi_add_device drivers/spi/spi.c:641 spi_new_device drivers/spi/spi.c:717 new_device_store+0x18c/0x1f1 [spi_stub 4e02719357f1ff33f5a43d00630982840568e85e] dev_attr_store drivers/base/core.c:2074 sysfs_kf_write fs/sysfs/file.c:139 kernfs_fop_write_iter fs/kernfs/file.c:300 new_sync_write fs/read_write.c:508 (discriminator 4) vfs_write fs/read_write.c:594 ksys_write fs/read_write.c:648 do_syscall_64 arch/x86/entry/common.c:50 entry_SYSCALL_64_after_hwframe arch/x86/entry/entry_64.S:113 Add error check in devm_regmap_init_encx24j600 to avoid this situation.

Severity

2.3 (Low)


                        
                          CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-05-22 20:20 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/66358471fa75a713f…
https://git.kernel.org/stable/c/f043fac1133a6c5ef…
https://git.kernel.org/stable/c/fddc7f678d7fb93ca…
https://git.kernel.org/stable/c/5e5494e6fc8a29c92…
https://git.kernel.org/stable/c/4c2eb80fc90b05559…
https://git.kernel.org/stable/c/e19c10d6e07c59c96…
https://git.kernel.org/stable/c/322c0e53496309e63…
https://git.kernel.org/stable/c/f03dca0c9e2297c84…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 04fbfce7a222327b97ca165294ef19f0faa45960 , < 66358471fa75a713fd76bc8a4bd74cb14cd50a4f (git) Affected: 04fbfce7a222327b97ca165294ef19f0faa45960 , < f043fac1133a6c5ef960a8422c0f6dd711dee462 (git) Affected: 04fbfce7a222327b97ca165294ef19f0faa45960 , < fddc7f678d7fb93caa0d7bc512f968ff1e2bddbc (git) Affected: 04fbfce7a222327b97ca165294ef19f0faa45960 , < 5e5494e6fc8a29c927e0478bec4a078a40da8901 (git) Affected: 04fbfce7a222327b97ca165294ef19f0faa45960 , < 4c2eb80fc90b05559ce6ed1b8dfb2348420b5644 (git) Affected: 04fbfce7a222327b97ca165294ef19f0faa45960 , < e19c10d6e07c59c96e90fe053a72683ad8b0397e (git) Affected: 04fbfce7a222327b97ca165294ef19f0faa45960 , < 322c0e53496309e634d9db7349678eaad1d25b55 (git) Affected: 04fbfce7a222327b97ca165294ef19f0faa45960 , < f03dca0c9e2297c84a018e306f8a9cd534ee4287 (git)
Linux	Linux	Affected: 4.4 Unaffected: 0 , < 4.4 (semver) Unaffected: 4.4.290 , ≤ 4.4.* (semver) Unaffected: 4.9.288 , ≤ 4.9.* (semver) Unaffected: 4.14.252 , ≤ 4.14.* (semver) Unaffected: 4.19.213 , ≤ 4.19.* (semver) Unaffected: 5.4.155 , ≤ 5.4.* (semver) Unaffected: 5.10.75 , ≤ 5.10.* (semver) Unaffected: 5.14.14 , ≤ 5.14.* (semver) Unaffected: 5.15 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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              "attackVector": "LOCAL",
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              "baseScore": 2.3,
              "baseSeverity": "LOW",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "HIGH",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L",
              "version": "3.1"
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                "role": "CISA Coordinator",
                "timestamp": "2024-05-22T20:20:31.324423Z",
                "version": "2.0.3"
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        "problemTypes": [
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                "description": "CWE-476 NULL Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "vendor": "Linux",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: encx24j600: check error in devm_regmap_init_encx24j600\n\ndevm_regmap_init may return error which caused by like out of memory,\nthis will results in null pointer dereference later when reading\nor writing register:\n\ngeneral protection fault in encx24j600_spi_probe\nKASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097]\nCPU: 0 PID: 286 Comm: spi-encx24j600- Not tainted 5.15.0-rc2-00142-g9978db750e31-dirty #11 9c53a778c1306b1b02359f3c2bbedc0222cba652\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014\nRIP: 0010:regcache_cache_bypass drivers/base/regmap/regcache.c:540\nCode: 54 41 89 f4 55 53 48 89 fb 48 83 ec 08 e8 26 94 a8 fe 48 8d bb a0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 \u003c80\u003e 3c 02 00 0f 85 4a 03 00 00 4c 8d ab b0 00 00 00 48 8b ab a0 00\nRSP: 0018:ffffc900010476b8 EFLAGS: 00010207\nRAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: 0000000000000000\nRDX: 0000000000000012 RSI: ffff888002de0000 RDI: 0000000000000094\nRBP: ffff888013c9a000 R08: 0000000000000000 R09: fffffbfff3f9cc6a\nR10: ffffc900010476e8 R11: fffffbfff3f9cc69 R12: 0000000000000001\nR13: 000000000000000a R14: ffff888013c9af54 R15: ffff888013c9ad08\nFS:  00007ffa984ab580(0000) GS:ffff88801fe00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000055a6384136c8 CR3: 000000003bbe6003 CR4: 0000000000770ef0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n encx24j600_spi_probe drivers/net/ethernet/microchip/encx24j600.c:459\n spi_probe drivers/spi/spi.c:397\n really_probe drivers/base/dd.c:517\n __driver_probe_device drivers/base/dd.c:751\n driver_probe_device drivers/base/dd.c:782\n __device_attach_driver drivers/base/dd.c:899\n bus_for_each_drv drivers/base/bus.c:427\n __device_attach drivers/base/dd.c:971\n bus_probe_device drivers/base/bus.c:487\n device_add drivers/base/core.c:3364\n __spi_add_device drivers/spi/spi.c:599\n spi_add_device drivers/spi/spi.c:641\n spi_new_device drivers/spi/spi.c:717\n new_device_store+0x18c/0x1f1 [spi_stub 4e02719357f1ff33f5a43d00630982840568e85e]\n dev_attr_store drivers/base/core.c:2074\n sysfs_kf_write fs/sysfs/file.c:139\n kernfs_fop_write_iter fs/kernfs/file.c:300\n new_sync_write fs/read_write.c:508 (discriminator 4)\n vfs_write fs/read_write.c:594\n ksys_write fs/read_write.c:648\n do_syscall_64 arch/x86/entry/common.c:50\n entry_SYSCALL_64_after_hwframe arch/x86/entry/entry_64.S:113\n\nAdd error check in devm_regmap_init_encx24j600 to avoid this situation."
        }
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        "dateUpdated": "2026-05-11T13:54:44.777Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47440",
    "datePublished": "2024-05-22T06:19:34.890Z",
    "dateReserved": "2024-05-21T14:58:30.831Z",
    "dateUpdated": "2026-05-11T13:54:44.777Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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EUVD-2026-309741

CVE-2021-47440 (GCVE-0-2021-47440)

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Nomenclature

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