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CVE-2025-39918 (GCVE-0-2025-39918)

Vulnerability from cvelistv5 – Published: 2025-10-01 07:55 – Updated: 2026-08-05 12:06
VLAI
Title
wifi: mt76: fix linked list corruption
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: fix linked list corruption Never leave scheduled wcid entries on the temporary on-stack list
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 17:43 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0b3be9d1d34e21dada69c539fbf51a5fe868028a , < e4d5a5fc61fdc65220a1ce078d24c1d20bbb0835 (git)
Affected: 0b3be9d1d34e21dada69c539fbf51a5fe868028a , < c91a59b04f928cb4a1436b0e0a27650883d0388a (git)
Affected: 0b3be9d1d34e21dada69c539fbf51a5fe868028a , < 49fba87205bec14a0f6bd997635bf3968408161e (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.12.46 , ≤ 6.12.* (semver)
Unaffected: 6.16.6 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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Slab grooming for the follow-on UAF write is likewise driven by attacker-timed association/disassociation, so no condition lies outside the attacker\u0027s influence.\\nPR:N - No credentials on the target kernel are needed: unassociated frame injection (probe/auth request floods eliciting responses, deauth frames forcing station teardown) drives both the TX-ring saturation and the mt76_wcid_cleanup() path that dereferences the corrupted list, and an attacker on an open or guest WLAN holds no privilege on the AP either.\\nUI:N - The corruption occurs inside the driver\u0027s tx worker and station-removal paths in response to attacker-generated frames alone. No action by any local user or administrator is required.\\nS:U - The corrupted list heads and the resulting writes are all within the kernel\u0027s own memory and security authority. No VM, IOMMU, or sandbox boundary is crossed.\\nC:H - The dangling list nodes are traversed and dereferenced through stale on-stack pointers and through freed, reallocated mt76 station slab objects, and the resulting `list_del` write primitive can be leveraged to disclose kernel memory. Per the use-after-free / memory-corruption guidance this rates High.\\nI:H - `list_del_init()` on an orphaned entry performs `next-\u003eprev = prev` / `prev-\u003enext = next`, writing kernel pointers into a stack frame already reused by another task and, after the neighbouring wcid is freed, into an attacker-groomable reallocated slab object \\u2014 a controllable kernel write primitive suitable for control-flow hijacking.\\nA:H - The bug permanently wedges TX for every orphaned station (their frames are never re-scheduled), and the cross-linked stale and live lists produce cycles that spin `while (!list_empty(\u0026tx_list))` forever under local_bh_disable() with phy-\u003etx_lock held, hanging the system; with CONFIG_DEBUG_LIST it is an immediate list-corruption BUG/oops.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"0b3be9d1d34e21dada69c539fbf51a5fe868028a\", \"lessThan\": \"e4d5a5fc61fdc65220a1ce078d24c1d20bbb0835\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0b3be9d1d34e21dada69c539fbf51a5fe868028a\", \"lessThan\": \"c91a59b04f928cb4a1436b0e0a27650883d0388a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0b3be9d1d34e21dada69c539fbf51a5fe868028a\", \"lessThan\": \"49fba87205bec14a0f6bd997635bf3968408161e\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/wireless/mediatek/mt76/tx.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.12\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.12\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.12.46\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.16.6\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.16.*\"}, {\"status\": \"unaffected\", \"version\": \"6.17\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/wireless/mediatek/mt76/tx.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/e4d5a5fc61fdc65220a1ce078d24c1d20bbb0835\"}, {\"url\": \"https://git.kernel.org/stable/c/c91a59b04f928cb4a1436b0e0a27650883d0388a\"}, {\"url\": \"https://git.kernel.org/stable/c/49fba87205bec14a0f6bd997635bf3968408161e\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nwifi: mt76: fix linked list corruption\\n\\nNever leave scheduled wcid entries on the temporary on-stack list\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.46\", \"versionStartIncluding\": \"6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.16.6\", \"versionStartIncluding\": \"6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.17\", \"versionStartIncluding\": \"6.12\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T12:06:03.017Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-39918\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T12:06:03.017Z\", \"dateReserved\": \"2025-04-16T07:20:57.147Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-10-01T07:55:13.851Z\", \"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

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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.


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.