CVE-2024-41046 (GCVE-0-2024-41046)

Vulnerability from cvelistv5 – Published: 2024-07-29 14:32 – Updated: 2026-10-15 00:47
VLAI
Title
net: ethernet: lantiq_etop: fix double free in detach
Summary
In the Linux kernel, the following vulnerability has been resolved: net: ethernet: lantiq_etop: fix double free in detach The number of the currently released descriptor is never incremented which results in the same skb being released multiple times.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:22 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6843 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 504d4721ee8e432af4b5f196a08af38bc4dac5fe , < 1a2db00a554cfda57c397cce79b2804bf9633fec (git)
Affected: 504d4721ee8e432af4b5f196a08af38bc4dac5fe , < 907443174e76b854d28024bd079f0e53b94dc9a1 (git)
Affected: 504d4721ee8e432af4b5f196a08af38bc4dac5fe , < 22b16618a80858b3a9d607708444426948cc4ae1 (git)
Affected: 504d4721ee8e432af4b5f196a08af38bc4dac5fe , < 69ad5fa0ce7c548262e0770fc2b726fe7ab4f156 (git)
Affected: 504d4721ee8e432af4b5f196a08af38bc4dac5fe , < c2b66e2b3939af63699e4a4bd25a8ac4a9b1d1b3 (git)
Affected: 504d4721ee8e432af4b5f196a08af38bc4dac5fe , < 9d23909ae041761cb2aa0c3cb1748598d8b6bc54 (git)
Affected: 504d4721ee8e432af4b5f196a08af38bc4dac5fe , < 84aaaa796a19195fc59290154fef9aeb1fba964f (git)
Affected: 504d4721ee8e432af4b5f196a08af38bc4dac5fe , < e1533b6319ab9c3a97dad314dd88b3783bc41b69 (git)
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Linux Linux Affected: 3.0
Unaffected: 0 , < 3.0 (semver)
Unaffected: 4.19.318 , ≤ 4.19.* (semver)
Unaffected: 5.4.280 , ≤ 5.4.* (semver)
Unaffected: 5.10.222 , ≤ 5.10.* (semver)
Unaffected: 5.15.163 , ≤ 5.15.* (semver)
Unaffected: 6.1.100 , ≤ 6.1.* (semver)
Unaffected: 6.6.41 , ≤ 6.6.* (semver)
Unaffected: 6.9.10 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
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Siemens RUGGEDCOM RST2428P Affected: 0 , < V3.1 (custom)
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Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family Unaffected: 0 , < * (custom)
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Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family Affected: 0 , < V3.1 (custom)
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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.0 , < V3.1.5 (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.0 , < V3.1.5 (custom)
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Siemens SIMATIC S7-1500 TM MFP - BIOS Affected: 0 , < * (custom)
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Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.0 , < V3.1.5 (custom)
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                "versions": [
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                    "status": "affected",
                    "version": "V3.1.0",
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                "url": "https://cert-portal.siemens.com/productcert/html/ssa-398330.html"
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            "x_adpType": "supplier"
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          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2024-41046",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
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                    "role": "CISA Coordinator",
                    "timestamp": "2024-09-10T16:22:57.535074Z",
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              "programFiles": [
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                  "value": "AV:A - The teardown path is reached via `ndo_tx_timeout`, which `dev_watchdog()` fires when the TX queue stays stopped for 10 s with carrier up \u2014 inducible by an attacker on the same Ethernet segment via sustained 802.3x PAUSE flooding or link-level stalling of the 100 Mbit MAC on these Lantiq CPE devices. The stall mechanism is link-local L2 and does not survive a router hop, so Adjacent rather than Network.\nAC:L - The attacker fully controls the stalling condition and can simply keep transmitting PAUSE frames past the 10-second watchdog window, and the buggy loop then unconditionally frees the same skb 192 times with no race or layout precondition. Heap grooming of the freed skb is also attacker-controlled since the same interface is receiving their traffic.\nPR:N - No account, credential, or authentication on the target is needed \u2014 an unauthenticated peer on the link segment only has to emit flow-control/traffic frames to trip the transmit watchdog. No local access or capability is involved on this path.\nUI:N - The watchdog timer fires automatically from `dev_watchdog()` and calls `ltq_etop_tx_timeout()` with no administrator or user action. No interface down/up, unbind, or module unload by a legitimate user is required.\nS:U - The double free corrupts kernel slab state within the same kernel security authority; no VM, hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - The 191 redundant frees operate on freed sk_buff memory, dereferencing `skb-\u003ehead`/`skb-\u003eend` to reach `skb_shinfo()` and re-inserting the object into the skb slab freelist, producing overlapping allocations that let an attacker read reallocated kernel heap contents (other packets, credentials, kernel pointers). Per kernel guidance, use-after-free/double-free is scored High confidentiality.\nI:H - Freeing the same object 192 times corrupts the `skbuff_cache` freelist into aliased allocations (arbitrary write primitive) and drives an indirect call through the attacker-influenceable `skb-\u003edestructor` field in `skb_release_head_state()`, plus a controlled `skb-\u003ehead` free and page refcount decrements. This is a control-flow-hijack-capable memory corruption, not a bounded modification.\nA:H - Even without exploitation the 191-fold double free reliably triggers slab corruption, list poisoning, and kernel panic/oops, and the DMA engine may still have the freed buffer mapped. The trigger is repeatable at will by the adjacent attacker."
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}



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