{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-39918","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T07:20:57.147Z","datePublished":"2025-10-01T07:55:13.851Z","dateUpdated":"2026-08-05T12:06:03.017Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T12:06:03.017Z"},"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"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:A - The vulnerable code is the mt76 802.11 TX scheduler, driven entirely by wireless traffic; an attacker within radio range saturates the hardware TX ring (flooding probe/auth requests an AP must answer, or bulk traffic) and controls station add/remove via association and injected deauth frames. This is same-WLAN-segment reachability, matching the standard Adjacent classification for WiFi driver bugs.\nAC:L - Both required conditions are directly attacker-controlled — TX-ring saturation is produced by the attacker's own traffic flood (or by forcing a scan/channel change that sets MT76_RESET), and multiple queued wcids are the normal state of a multi-station AP. Slab grooming for the follow-on UAF write is likewise driven by attacker-timed association/disassociation, so no condition lies outside the attacker's 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's 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's 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->prev = prev` / `prev->next = 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 — 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(&tx_list))` forever under local_bh_disable() with phy->tx_lock held, hanging the system; with CONFIG_DEBUG_LIST it is an immediate list-corruption BUG/oops."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/tx.c"],"versions":[{"version":"0b3be9d1d34e21dada69c539fbf51a5fe868028a","lessThan":"e4d5a5fc61fdc65220a1ce078d24c1d20bbb0835","status":"affected","versionType":"git"},{"version":"0b3be9d1d34e21dada69c539fbf51a5fe868028a","lessThan":"c91a59b04f928cb4a1436b0e0a27650883d0388a","status":"affected","versionType":"git"},{"version":"0b3be9d1d34e21dada69c539fbf51a5fe868028a","lessThan":"49fba87205bec14a0f6bd997635bf3968408161e","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/tx.c"],"versions":[{"version":"6.12","status":"affected"},{"version":"0","lessThan":"6.12","status":"unaffected","versionType":"semver"},{"version":"6.12.46","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.16.6","lessThanOrEqual":"6.16.*","status":"unaffected","versionType":"semver"},{"version":"6.17","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.12.46"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.16.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.17"}]}]}],"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"}],"title":"wifi: mt76: fix linked list corruption","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2025-39918","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-01-14T17:43:08.095838Z"}}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","description":"CWE-noinfo Not enough information"}]}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-01-14T17:52:47.870Z"}}]}}