Vulnerability-Lookup

GHSA-55F8-PRFX-MFVW

Vulnerability from github – Published: 2025-09-11 18:35 – Updated: 2025-11-26 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

wifi: ath12k: Decrement TID on RX peer frag setup error handling

Currently, TID is not decremented before peer cleanup, during error handling path of ath12k_dp_rx_peer_frag_setup(). This could lead to out-of-bounds access in peer->rx_tid[].

Hence, add a decrement operation for TID, before peer cleanup to ensures proper cleanup and prevents out-of-bounds access issues when the RX peer frag setup fails.

Found during code review. Compile tested only.

Severity

7.1 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2025-39761"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-11T17:15:40Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: Decrement TID on RX peer frag setup error handling\n\nCurrently, TID is not decremented before peer cleanup, during error\nhandling path of ath12k_dp_rx_peer_frag_setup(). This could lead to\nout-of-bounds access in peer-\u003erx_tid[].\n\nHence, add a decrement operation for TID, before peer cleanup to\nensures proper cleanup and prevents out-of-bounds access issues when\nthe RX peer frag setup fails.\n\nFound during code review. Compile tested only.",
  "id": "GHSA-55f8-prfx-mfvw",
  "modified": "2025-11-26T18:31:02Z",
  "published": "2025-09-11T18:35:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39761"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7c0884fcd2ddde0544d2e77f297ae461e1f53f58"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7c3e99fd4a66a5ac9c7dd32db07359666efe0002"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9530d666f4376c294cdf4348c29fe3542fec980a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a3b73c72c42348bf1555fd2b00f32f941324b242"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb1e1526b82b8cf31f1ef9ca86a2647fb6cd89c6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-39761 (GCVE-0-2025-39761)

Vulnerability from cvelistv5 – Published: 2025-09-11 16:52 – Updated: 2026-08-05 12:05

Title

wifi: ath12k: Decrement TID on RX peer frag setup error handling

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: Decrement TID on RX peer frag setup error handling Currently, TID is not decremented before peer cleanup, during error handling path of ath12k_dp_rx_peer_frag_setup(). This could lead to out-of-bounds access in peer->rx_tid[]. Hence, add a decrement operation for TID, before peer cleanup to ensures proper cleanup and prevents out-of-bounds access issues when the RX peer frag setup fails. Found during code review. 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

Linux mitre root

References

5 references

URL	Tags
https://git.kernel.org/stable/c/eb1e1526b82b8cf31…
https://git.kernel.org/stable/c/7c3e99fd4a66a5ac9…
https://git.kernel.org/stable/c/a3b73c72c42348bf1…
https://git.kernel.org/stable/c/9530d666f4376c294…
https://git.kernel.org/stable/c/7c0884fcd2ddde054…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d889913205cf7ebda905b1e62c5867ed4e39f6c2 , < eb1e1526b82b8cf31f1ef9ca86a2647fb6cd89c6 (git) Affected: d889913205cf7ebda905b1e62c5867ed4e39f6c2 , < 7c3e99fd4a66a5ac9c7dd32db07359666efe0002 (git) Affected: d889913205cf7ebda905b1e62c5867ed4e39f6c2 , < a3b73c72c42348bf1555fd2b00f32f941324b242 (git) Affected: d889913205cf7ebda905b1e62c5867ed4e39f6c2 , < 9530d666f4376c294cdf4348c29fe3542fec980a (git) Affected: d889913205cf7ebda905b1e62c5867ed4e39f6c2 , < 7c0884fcd2ddde0544d2e77f297ae461e1f53f58 (git)
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)

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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "drivers/net/wireless/ath/ath12k/dp.c"
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              "version": "6.3"
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              "status": "unaffected",
              "version": "6.12.43",
              "versionType": "semver"
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              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.11",
              "versionType": "semver"
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              "versionType": "semver"
            },
            {
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              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: Decrement TID on RX peer frag setup error handling\n\nCurrently, TID is not decremented before peer cleanup, during error\nhandling path of ath12k_dp_rx_peer_frag_setup(). This could lead to\nout-of-bounds access in peer-\u003erx_tid[].\n\nHence, add a decrement operation for TID, before peer cleanup to\nensures proper cleanup and prevents out-of-bounds access issues when\nthe RX peer frag setup fails.\n\nFound during code review. Compile tested only."
        }
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The vulnerable path is entered from `ath12k_mac_station_add()` when a WiFi peer is added, which in AP/mesh mode is driven by a station within radio range sending Authentication/peering frames. This requires adjacency on the 802.11 link, not routable network access.\nAC:L - The attacker drives both the trigger and the failure condition \u2014 repeated association/deauthentication floods create the peer-unmap race that makes `ath12k_dp_rx_peer_frag_setup()` return -ENOENT, and the same flood (17 DMA queue buffers plus a peer struct per station, up to 2048 peers) creates the memory pressure that fails `crypto_alloc_shash()`. Both sides of the race are attacker-controlled, and the attempt can be repeated indefinitely at no cost.\nPR:N - In AP and mesh mode the `NOTEXIST -\u003e NONE` sta_state transition occurs on receipt of an Authentication/peering frame, before the 4-way handshake verifies any credentials, so an unauthenticated station reaches `ath12k_dp_peer_setup()`. On open networks no credentials exist at all.\nUI:N - An attacking station associates with the ath12k AP on its own initiative; no action by any local user or administrator is needed.\nS:U - The out-of-bounds read, the `kfree()` of an OOB-derived pointer, and the REO LUT corruption all occur within the kernel\u0027s own security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - `ath12k_dp_rx_peer_tid_delete()` reads a full 128-byte `ath12k_dp_rx_tid` at `peer-\u003erx_tid[17]`, 72 bytes of which lie past the end of the 2312-byte allocation in un-zeroed kmalloc-4096 slack, and copies it into a REO command element. The read is unbounded stale-slab content, not a few bounded bytes, and the recovered pointer/DMA-address values feed further driver operations.\nI:H - The path performs an out-of-bounds write (`rx_tid-\u003eactive = false` clobbers `peer-\u003emcast_keyidx`, the index used to select the group decryption key at `mac.c:8144`), zeroes another peer\u0027s TID-0 entry in the hardware-shared REO LUT at index `peer_id*17 + 17` (or writes 8 bytes past the LUT at `DP_MAX_PEER_ID`), and reaches `kfree()` on a pointer read from groomable slab slack \u2014 an arbitrary-free primitive leveragable for heap corruption and control-flow hijack.\nA:H - `kfree()` of a garbage pointer and `dma_unmap_single()` with a bogus address and size cause slab-corruption panics and IOMMU faults, while zeroing another station\u0027s REO queue address in a table the WiFi hardware reads breaks that peer\u0027s RX path and can wedge the firmware, all triggerable repeatedly by an unauthenticated nearby station."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:05:01.054Z",
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        },
        {
          "url": "https://git.kernel.org/stable/c/7c0884fcd2ddde0544d2e77f297ae461e1f53f58"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39761",
    "datePublished": "2025-09-11T16:52:29.788Z",
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Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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