CVE-2024-26621 (GCVE-0-2024-26621)

Vulnerability from cvelistv5 – Published: 2024-03-02 21:31 – Updated: 2026-08-05 11:26
VLAI
Title
mm: huge_memory: don't force huge page alignment on 32 bit
Summary
In the Linux kernel, the following vulnerability has been resolved: mm: huge_memory: don't force huge page alignment on 32 bit commit efa7df3e3bb5 ("mm: align larger anonymous mappings on THP boundaries") caused two issues [1] [2] reported on 32 bit system or compat userspace. It doesn't make too much sense to force huge page alignment on 32 bit system due to the constrained virtual address space. [1] https://lore.kernel.org/linux-mm/d0a136a0-4a31-46bc-adf4-2db109a61672@kernel.org/ [2] https://lore.kernel.org/linux-mm/CAJuCfpHXLdQy1a2B6xN2d7quTYwg2OoZseYPZTRpU0eHHKD-sQ@mail.gmail.com/
Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 15:56 UTC
Assigner
References
URL Tags
https://git.kernel.org/stable/c/87632bc9ecff5ded9…
https://git.kernel.org/stable/c/6ea9aa8d97e656367…
https://git.kernel.org/stable/c/7432376c913381c5f…
https://git.kernel.org/stable/c/4ef9ad19e17676b9e…
https://zolutal.github.io/aslrnt/ x_transferred
http://www.openwall.com/lists/oss-security/2024/07/08/3 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/08/5 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/08/4 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/08/6 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/08/7 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/08/8 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/09/1 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/10/5 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/10/7 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/10/8 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/11/4 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/11/5 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/11/7 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/12/3 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/13/2 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/13/7 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/15/2 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/15/1 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/16/1 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/16/2 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/29/2 x_transferred
http://www.openwall.com/lists/oss-security/2024/07/30/2 x_transferred
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1854bc6e2420472676c5c90d3d6b15f6cd640e40 , < 87632bc9ecff5ded93433bc0fca428019bdd1cfe (git)
Affected: 1854bc6e2420472676c5c90d3d6b15f6cd640e40 , < 6ea9aa8d97e6563676094cb35755884173269555 (git)
Affected: 1854bc6e2420472676c5c90d3d6b15f6cd640e40 , < 7432376c913381c5f24d373a87ff629bbde94b47 (git)
Affected: 1854bc6e2420472676c5c90d3d6b15f6cd640e40 , < 4ef9ad19e17676b9ef071309bc62020e2373705d (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 6.1.81 , ≤ 6.1.* (semver)
Unaffected: 6.6.46 , ≤ 6.6.* (semver)
Unaffected: 6.7.6 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Undergoing Analysis"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26621\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-02T22:15:50.340\",\"lastModified\":\"2026-08-04T11:16:49.370\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmm: huge_memory: don\u0027t force huge page alignment on 32 bit\\n\\ncommit efa7df3e3bb5 (\\\"mm: align larger anonymous mappings on THP\\nboundaries\\\") caused two issues [1] [2] reported on 32 bit system or compat\\nuserspace.\\n\\nIt doesn\u0027t make too much sense to force huge page alignment on 32 bit\\nsystem due to the constrained virtual address space.\\n\\n[1] https://lore.kernel.org/linux-mm/d0a136a0-4a31-46bc-adf4-2db109a61672@kernel.org/\\n[2] https://lore.kernel.org/linux-mm/CAJuCfpHXLdQy1a2B6xN2d7quTYwg2OoZseYPZTRpU0eHHKD-sQ@mail.gmail.com/\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: mm: huge_memory: no forzar una alineaci\u00f3n de p\u00e1gina enorme en el commit de 32 bits efa7df3e3bb5 (\\\"mm: alinear asignaciones an\u00f3nimas m\u00e1s grandes en los l\u00edmites de THP\\\") caus\u00f3 dos problemas [1] [2] informado en un sistema de 32 bits o espacio de usuario compatible. No tiene mucho sentido forzar una gran alineaci\u00f3n de p\u00e1ginas en un sistema de 32 bits debido al espacio limitado de direcciones virtuales. [1] https://lore.kernel.org/linux-mm/d0a136a0-4a31-46bc-adf4-2db109a61672@kernel.org/ [2] https://lore.kernel.org/linux-mm/CAJuCfpHXLdQy1a2B6xN2d7quTYwg2OoZseYPZTRpU0eHHKD- sQ@mail.gmail.com/\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"mm/huge_memory.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"1854bc6e2420472676c5c90d3d6b15f6cd640e40\",\"lessThan\":\"87632bc9ecff5ded93433bc0fca428019bdd1cfe\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1854bc6e2420472676c5c90d3d6b15f6cd640e40\",\"lessThan\":\"6ea9aa8d97e6563676094cb35755884173269555\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1854bc6e2420472676c5c90d3d6b15f6cd640e40\",\"lessThan\":\"7432376c913381c5f24d373a87ff629bbde94b47\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1854bc6e2420472676c5c90d3d6b15f6cd640e40\",\"lessThan\":\"4ef9ad19e17676b9ef071309bc62020e2373705d\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"mm/huge_memory.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.18\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.18\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.81\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.46\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.7.6\",\"lessThanOrEqual\":\"6.7.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.8\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L\",\"baseScore\":8.2,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":3.9,\"impactScore\":4.2},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-09-10T15:56:53.851124Z\",\"id\":\"CVE-2024-26621\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA 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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-04T22:51:49+00:00",
      "cve": "CVE-2024-26621",
      "id": "CVE-2024-26621",
      "initial_release_date": "2024-03-02T00:00:00+00:00",
      "product_status:known_affected": "42",
      "product_status:known_not_affected": "156",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mm: huge_memory: don\u0027t force huge page alignment on 32 bit",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-26621.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-05T01:01:45Z",
      "cve": "CVE-2024-26621",
      "id": "CVE-2024-26621",
      "initial_release_date": "2024-03-06T04:32:59Z",
      "product_status:known_not_affected": "292",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-26621",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-26621.json",
      "version": "18"
    },
    "vulnrichment": {
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      "cveMetadata": "{\"cveId\": \"CVE-2024-26621\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T11:26:19.370Z\", \"dateReserved\": \"2024-02-19T14:20:24.134Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-02T21:31:49.158Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.