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CVE-2024-39478 (GCVE-0-2024-39478)

Vulnerability from cvelistv5 – Published: 2024-07-05 06:55 – Updated: 2026-09-02 12:49
VLAI
Title
crypto: starfive - Do not free stack buffer
Summary
In the Linux kernel, the following vulnerability has been resolved: crypto: starfive - Do not free stack buffer RSA text data uses variable length buffer allocated in software stack. Calling kfree on it causes undefined behaviour in subsequent operations.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-07-08 14:13 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 445a4aaf5842073e4130b1d6dbe3785284d9615f , < bfd861dadd3a45de257b3d328bf49b64a6f9c5f1 (git)
Affected: 445a4aaf5842073e4130b1d6dbe3785284d9615f , < 5944de192663f272033501dcd322b008fca72006 (git)
Affected: 445a4aaf5842073e4130b1d6dbe3785284d9615f , < d7f01649f4eaf1878472d3d3f480ae1e50d98f6c (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.5
Unaffected: 0 , < 6.5 (semver)
Unaffected: 6.6.156 , ≤ 6.6.* (semver)
Unaffected: 6.9.5 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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The attacker also controls the contents of the wrongly-freed memory, since the RSA plaintext is copied into rsa_data.\\nPR:L - Any unprivileged user can add an X.509/asymmetric key to their own session keyring and invoke KEYCTL_PKEY_* on it; the only check is KEY_NEED_SEARCH on a key they own, with no capability requirement.\\nUI:N - Exploitation is entirely attacker-driven via syscalls in the attacker\u0027s own process; no victim action or interaction is needed.\\nS:U - The corruption is confined to the kernel\u0027s own slab allocator within the same security authority; there is no VM, IOMMU, or sandbox boundary crossed.\\nC:H - Freeing an interior pointer places a misaligned address on the SLUB freelist, so a subsequent allocation overlaps the still-live request buffer, yielding attacker-readable aliasing of kernel heap memory that can be leveraged for arbitrary kernel memory disclosure.\\nI:H - The invalid free writes a freepointer into the middle of a live object and creates overlapping/double-freed allocations whose contents the attacker controls, a classic heap-corruption primitive leading to arbitrary write and privilege escalation.\\nA:H - Freelist corruption from freeing a non-slab-aligned pointer reliably causes kernel oops/panic, and the operation can be repeated at will to guarantee a crash.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"445a4aaf5842073e4130b1d6dbe3785284d9615f\", \"lessThan\": \"bfd861dadd3a45de257b3d328bf49b64a6f9c5f1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"445a4aaf5842073e4130b1d6dbe3785284d9615f\", \"lessThan\": \"5944de192663f272033501dcd322b008fca72006\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"445a4aaf5842073e4130b1d6dbe3785284d9615f\", \"lessThan\": \"d7f01649f4eaf1878472d3d3f480ae1e50d98f6c\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/crypto/starfive/jh7110-rsa.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.5\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.5\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.6.156\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/crypto/starfive/jh7110-rsa.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/bfd861dadd3a45de257b3d328bf49b64a6f9c5f1\"}, {\"url\": \"https://git.kernel.org/stable/c/5944de192663f272033501dcd322b008fca72006\"}, {\"url\": \"https://git.kernel.org/stable/c/d7f01649f4eaf1878472d3d3f480ae1e50d98f6c\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncrypto: starfive - Do not free stack buffer\\n\\nRSA text data uses variable length buffer allocated in software stack.\\nCalling kfree on it causes undefined behaviour in subsequent operations.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.156\", \"versionStartIncluding\": \"6.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.5\", \"versionStartIncluding\": \"6.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10\", \"versionStartIncluding\": \"6.5\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-09-02T12:49:12.242Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-39478\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-02T12:49:12.242Z\", \"dateReserved\": \"2024-06-25T14:23:23.746Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-05T06:55:07.936Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.