CVE-2024-41046

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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->head`/`skb->end` 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->destructor` field in `skb_release_head_state()`, plus a controlled `skb->head` 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."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/lantiq_etop.c"], "versions": [{"version": "504d4721ee8e432af4b5f196a08af38bc4dac5fe", "lessThan": "1a2db00a554cfda57c397cce79b2804bf9633fec", "status": "affected", "versionType": "git"}, {"version": "504d4721ee8e432af4b5f196a08af38bc4dac5fe", "lessThan": "907443174e76b854d28024bd079f0e53b94dc9a1", "status": "affected", "versionType": "git"}, {"version": "504d4721ee8e432af4b5f196a08af38bc4dac5fe", "lessThan": "22b16618a80858b3a9d607708444426948cc4ae1", "status": "affected", "versionType": "git"}, {"version": "504d4721ee8e432af4b5f196a08af38bc4dac5fe", "lessThan": "69ad5fa0ce7c548262e0770fc2b726fe7ab4f156", "status": "affected", "versionType": "git"}, {"version": "504d4721ee8e432af4b5f196a08af38bc4dac5fe", "lessThan": "c2b66e2b3939af63699e4a4bd25a8ac4a9b1d1b3", "status": "affected", "versionType": "git"}, {"version": "504d4721ee8e432af4b5f196a08af38bc4dac5fe", "lessThan": "9d23909ae041761cb2aa0c3cb1748598d8b6bc54", "status": "affected", "versionType": "git"}, {"version": "504d4721ee8e432af4b5f196a08af38bc4dac5fe", "lessThan": "84aaaa796a19195fc59290154fef9aeb1fba964f", "status": "affected", "versionType": "git"}, {"version": "504d4721ee8e432af4b5f196a08af38bc4dac5fe", "lessThan": "e1533b6319ab9c3a97dad314dd88b3783bc41b69", "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/ethernet/lantiq_etop.c"], "versions": [{"version": "3.0", "status": "affected"}, {"version": "0", "lessThan": "3.0", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.318", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.280", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.222", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.163", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.100", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.41", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.9.10", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.10", "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": "3.0", "versionEndExcluding": "4.19.318"}, {"vulnerable": true, "criteria": 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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->head`/`skb->end` 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->destructor` field in `skb_release_head_state()`, plus a controlled `skb->head` 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."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "504d4721ee8e432af4b5f196a08af38bc4dac5fe", "lessThan": "1a2db00a554cfda57c397cce79b2804bf9633fec", "versionType": "git"}, {"status": "affected", "version": "504d4721ee8e432af4b5f196a08af38bc4dac5fe", "lessThan": "907443174e76b854d28024bd079f0e53b94dc9a1", "versionType": "git"}, {"status": "affected", "version": "504d4721ee8e432af4b5f196a08af38bc4dac5fe", "lessThan": "22b16618a80858b3a9d607708444426948cc4ae1", "versionType": "git"}, {"status": "affected", "version": "504d4721ee8e432af4b5f196a08af38bc4dac5fe", "lessThan": "69ad5fa0ce7c548262e0770fc2b726fe7ab4f156", "versionType": "git"}, {"status": "affected", "version": "504d4721ee8e432af4b5f196a08af38bc4dac5fe", "lessThan": "c2b66e2b3939af63699e4a4bd25a8ac4a9b1d1b3", "versionType": "git"}, 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{"bugzilla": {"description": "kernel: net: ethernet: lantiq_etop: fix double free in detach", "id": "2300416", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2300416"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-415", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: ethernet: lantiq_etop: fix double free in detach\nThe number of the currently released descriptor is never incremented\nwhich results in the same skb being released multiple times.", "A vulnerability was found in the Linux kernel where the Lantiq Ethernet driver could cause a double-free error due to improper handling of network packet descriptors. This issue occurs because the counter tracking released descriptors are not incremented correctly, leading to the same network packet buffer being released multiple times. This flaw can result in memory corruption, causing unexpected behavior, system crashes, or even creating opportunities for attackers to exploit the system."], "mitigation": {"lang": "en:us", "value": "It is recommended to update to the latest stable kernel version to address this vulnerability."}, "name": "CVE-2024-41046", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-07-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-41046\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-41046\nhttps://lore.kernel.org/linux-cve-announce/2024072926-CVE-2024-41046-aea4@gregkh/T"], "statement": "This vulnerability is rated as IMPORTANT because it directly affects system stability and could be leveraged for attacks resulting in high confidentiality, integrity, and availability impacts.", "threat_severity": "Important"}

{}