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CVE-2025-39750 (GCVE-0-2025-39750)

Vulnerability from cvelistv5 – Published: 2025-09-11 16:52 – Updated: 2026-08-05 12:04
VLAI
Title
wifi: ath12k: Correct tid cleanup when tid setup fails
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: Correct tid cleanup when tid setup fails Currently, if any error occurs during ath12k_dp_rx_peer_tid_setup(), the tid value is already incremented, even though the corresponding TID is not actually allocated. Proceed to ath12k_dp_rx_peer_tid_delete() starting from unallocated tid, which might leads to freeing unallocated TID and cause potential crash or out-of-bounds access. Hence, fix by correctly decrementing tid before cleanup to match only the successfully allocated TIDs. Also, remove tid-- from failure case of ath12k_dp_rx_peer_frag_setup(), as decrementing the tid before cleanup in loop will take care of this. Compile tested only.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d889913205cf7ebda905b1e62c5867ed4e39f6c2 , < 30cad87978057516c93467516bc481a3eacfd66a (git)
Affected: d889913205cf7ebda905b1e62c5867ed4e39f6c2 , < 2ef17d1476ab26bce89764e2f16833d7f52acc38 (git)
Affected: d889913205cf7ebda905b1e62c5867ed4e39f6c2 , < 907c630e58af9e86e215f3951c7b287bd86d0f15 (git)
Affected: d889913205cf7ebda905b1e62c5867ed4e39f6c2 , < 6301fe4f209165334d251a1c6da8ae47f93cb32c (git)
Affected: d889913205cf7ebda905b1e62c5867ed4e39f6c2 , < 4a2bf707270f897ab8077baee8ed5842a5321686 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.3
Unaffected: 0 , < 6.3 (semver)
Unaffected: 6.6.103 , ≤ 6.6.* (semver)
Unaffected: 6.12.43 , ≤ 6.12.* (semver)
Unaffected: 6.15.11 , ≤ 6.15.* (semver)
Unaffected: 6.16.2 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: Correct tid cleanup when tid setup fails\n\nCurrently, if any error occurs during ath12k_dp_rx_peer_tid_setup(),\nthe tid value is already incremented, even though the corresponding\nTID is not actually allocated. Proceed to\nath12k_dp_rx_peer_tid_delete() starting from unallocated tid,\nwhich might leads to freeing unallocated TID and cause potential\ncrash or out-of-bounds access.\n\nHence, fix by correctly decrementing tid before cleanup to match only\nthe successfully allocated TIDs.\n\nAlso, remove tid-- from failure case of ath12k_dp_rx_peer_frag_setup(),\nas decrementing the tid before cleanup in loop will take care of this.\n\nCompile tested only."
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              "value": "AV:A - The vulnerable path is entered from the ath12k WiFi driver\u0027s mac80211 `sta_state` callback when a peer is added in response to received 802.11 management frames, so the attacker must be within radio range of the AP/STA, i.e. on the same wireless segment.\nAC:L - The attacker controls both sides of the trigger \u2014 repeatedly transmitting auth/assoc frames from spoofed MACs (each allocating 17 GFP_ATOMIC REO queue descriptors) and immediately deauthing to race peer teardown against the 17-TID setup loop \u2014 so the `ath12k_dp_rx_peer_frag_setup()` failure needed to reach `rx_tid[17]` is attacker-driven rather than beyond their influence.\nPR:N - In AP mode mac80211/hostapd add the station (NOTEXIST\u2192NONE) upon an 802.11 Authentication frame, before any credentials, PSK, or 802.1X exchange is verified, so the attacker needs no account or key on the target.\nUI:N - Exploitation requires only that the attacker transmit 802.11 frames to a listening ath12k AP; no action by a local user or administrator is needed.\nS:U - The out-of-bounds read/write and invalid free corrupt kernel heap memory managed by the same kernel security authority; there is no crossing into a hypervisor, guest, or sandbox boundary.\nC:H - `ath12k_dp_reo_cmd_send()` performs a 128-byte `memcpy` from `\u0026peer-\u003erx_tid[17]`, copying out-of-bounds heap contents (including kernel pointers and DMA addresses) into a cached REO command element, and the OOB-read address is also handed to hardware \u2014 an unbounded adjacent-memory read.\nI:H - The bug yields out-of-bounds writes past `peer-\u003erx_tid[]` (`vaddr = NULL`, `active = false`, plus an 8-byte write one entry past the REO LUT), a `kfree()` of a pointer synthesized from out-of-bounds bytes (arbitrary-free primitive), and a REO hardware queue-descriptor write at an attacker-influenced physical address \u2014 all usable for control-flow-relevant heap corruption.\nA:H - Freeing a wild pointer and `dma_unmap_single()` on a bogus DMA address reliably produce slab corruption, IOMMU faults, or an oops/panic, taking down the kernel and the WiFi interface."
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    "redhat_vex": {
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      "cve": "CVE-2025-39750",
      "id": "CVE-2025-39750",
      "initial_release_date": "2025-09-11T23:24:19Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "394",
      "product_status:known_not_affected": "391",
      "product_status:recommended": "464",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-39750",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-39750.json",
      "version": "51"
    }
  }
}



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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.


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