CVE-2025-40279 (GCVE-0-2025-40279)

Vulnerability from cvelistv5 – Published: 2025-12-06 21:51 – Updated: 2025-12-06 21:51
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: net: sched: act_connmark: initialize struct tc_ife to fix kernel leak In tcf_connmark_dump(), the variable 'opt' was partially initialized using a designatied initializer. While the padding bytes are reamined uninitialized. nla_put() copies the entire structure into a netlink message, these uninitialized bytes leaked to userspace. Initialize the structure with memset before assigning its fields to ensure all members and padding are cleared prior to beign copied.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae , < 218b67c8c8246d47a2a7910eae80abe4861fe2b7 (git)
Affected: 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae , < 73cc56c608c209d3d666cc571293b090a471da70 (git)
Affected: 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae , < 31e4aa93e2e5b5647fc235b0f6ee329646878f9e (git)
Affected: 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae , < 51cb05d4fd632596816ba44e882e84db9fb28a7e (git)
Affected: 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae , < 25837889ec062f2b7618142cd80253dff3da5343 (git)
Affected: 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae , < 62b656e43eaeae445a39cd8021a4f47065af4389 (git)
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    Linux Linux Affected: 4.0
Unaffected: 0 , < 4.0 (semver)
Unaffected: 5.15.197 , ≤ 5.15.* (semver)
Unaffected: 6.1.159 , ≤ 6.1.* (semver)
Unaffected: 6.6.117 , ≤ 6.6.* (semver)
Unaffected: 6.12.59 , ≤ 6.12.* (semver)
Unaffected: 6.17.9 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: act_connmark: initialize struct tc_ife to fix kernel leak\n\nIn tcf_connmark_dump(), the variable \u0027opt\u0027 was partially initialized using a\ndesignatied initializer. While the padding bytes are reamined\nuninitialized. nla_put() copies the entire structure into a\nnetlink message, these uninitialized bytes leaked to userspace.\n\nInitialize the structure with memset before assigning its fields\nto ensure all members and padding are cleared prior to beign copied."
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        "dateUpdated": "2025-12-06T21:51:03.010Z",
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    "dateReserved": "2025-04-16T07:20:57.184Z",
    "dateUpdated": "2025-12-06T21:51:03.010Z",
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}


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  • 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.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • 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.