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CVE-2022-50749 (GCVE-0-2022-50749)

Vulnerability from cvelistv5 – Published: 2025-12-24 13:05 – Updated: 2026-05-11 19:24
VLAI
Title
acct: fix potential integer overflow in encode_comp_t()
Summary
In the Linux kernel, the following vulnerability has been resolved: acct: fix potential integer overflow in encode_comp_t() The integer overflow is descripted with following codes: > 317 static comp_t encode_comp_t(u64 value) > 318 { > 319 int exp, rnd; ...... > 341 exp <<= MANTSIZE; > 342 exp += value; > 343 return exp; > 344 } Currently comp_t is defined as type of '__u16', but the variable 'exp' is type of 'int', so overflow would happen when variable 'exp' in line 343 is greater than 65535.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e93f995a591c352d35d89c518c54f790e1537754 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cf60bbca1b83a7e0927e36dbf178328982927886 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1750a0983c455a9b3badd848471fc8d58cb61f67 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a815a3e019456c94b03bd183e7ac22fd29e9e6fd (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6edd0cdee5780fd5f43356b72b29a2a6d48ef6da (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ebe16676e1dcaa4556ec4d36ca40c82e99e88cfa (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2224897d8187dc22a83e05d9361efcccf67bcf12 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0aac6e60c464a5f942f995428e67f8ae1c422250 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c5f31c655bcc01b6da53b836ac951c1556245305 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 4.9.337 , ≤ 4.9.* (semver)
Unaffected: 4.14.303 , ≤ 4.14.* (semver)
Unaffected: 4.19.270 , ≤ 4.19.* (semver)
Unaffected: 5.4.229 , ≤ 5.4.* (semver)
Unaffected: 5.10.163 , ≤ 5.10.* (semver)
Unaffected: 5.15.86 , ≤ 5.15.* (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nacct: fix potential integer overflow in encode_comp_t()\n\nThe integer overflow is descripted with following codes:\n  \u003e 317 static comp_t encode_comp_t(u64 value)\n  \u003e 318 {\n  \u003e 319         int exp, rnd;\n    ......\n  \u003e 341         exp \u003c\u003c= MANTSIZE;\n  \u003e 342         exp += value;\n  \u003e 343         return exp;\n  \u003e 344 }\n\nCurrently comp_t is defined as type of \u0027__u16\u0027, but the variable \u0027exp\u0027 is\ntype of \u0027int\u0027, so overflow would happen when variable \u0027exp\u0027 in line 343 is\ngreater than 65535."
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        "dateUpdated": "2026-05-11T19:24:46.724Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "title": "acct: fix potential integer overflow in encode_comp_t()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50749",
    "datePublished": "2025-12-24T13:05:44.734Z",
    "dateReserved": "2025-12-24T13:02:21.544Z",
    "dateUpdated": "2026-05-11T19:24:46.724Z",
    "state": "PUBLISHED"
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65535.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"kernel/acct.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"e93f995a591c352d35d89c518c54f790e1537754\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"cf60bbca1b83a7e0927e36dbf178328982927886\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"1750a0983c455a9b3badd848471fc8d58cb61f67\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"a815a3e019456c94b03bd183e7ac22fd29e9e6fd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"6edd0cdee5780fd5f43356b72b29a2a6d48ef6da\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"ebe16676e1dcaa4556ec4d36ca40c82e99e88cfa\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"2224897d8187dc22a83e05d9361efcccf67bcf12\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"0aac6e60c464a5f942f995428e67f8ae1c422250\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"c5f31c655bcc01b6da53b836ac951c1556245305\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"kernel/acct.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.9.337\",\"lessThanOrEqual\":\"4.9.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.14.303\",\"lessThanOrEqual\":\"4.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.270\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.229\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.163\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.86\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.0.16\",\"lessThanOrEqual\":\"6.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.2\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0aac6e60c464a5f942f995428e67f8ae1c422250\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1750a0983c455a9b3badd848471fc8d58cb61f67\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2224897d8187dc22a83e05d9361efcccf67bcf12\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6edd0cdee5780fd5f43356b72b29a2a6d48ef6da\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a815a3e019456c94b03bd183e7ac22fd29e9e6fd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c5f31c655bcc01b6da53b836ac951c1556245305\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cf60bbca1b83a7e0927e36dbf178328982927886\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e93f995a591c352d35d89c518c54f790e1537754\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ebe16676e1dcaa4556ec4d36ca40c82e99e88cfa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:36:49+00:00",
      "cve": "CVE-2022-50749",
      "id": "CVE-2022-50749",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: acct: fix potential integer overflow in encode_comp_t()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50749.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-09-01T01:23:48Z",
      "cve": "CVE-2022-50749",
      "id": "CVE-2022-50749",
      "initial_release_date": "2025-12-25T01:04:15Z",
      "product_status:known_affected": "554",
      "product_status:known_not_affected": "172",
      "product_status:recommended": "233",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50749",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50749.json",
      "version": "28"
    }
  }
}



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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

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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.