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{
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"data_type" : "CVE" ,
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"ID" : "CVE-2024-46800" ,
2024-09-18 08:00:37 +00:00
"ASSIGNER" : "cve@kernel.org" ,
"STATE" : "PUBLIC"
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} ,
"description" : {
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"lang" : "eng" ,
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"value" : "In the Linux kernel, the following vulnerability has been resolved:\n\nsch/netem: fix use after free in netem_dequeue\n\nIf netem_dequeue() enqueues packet to inner qdisc and that qdisc\nreturns __NET_XMIT_STOLEN. The packet is dropped but\nqdisc_tree_reduce_backlog() is not called to update the parent's\nq.qlen, leading to the similar use-after-free as Commit\ne04991a48dbaf382 (\"netem: fix return value if duplicate enqueue\nfails\")\n\nCommands to trigger KASAN UaF:\n\nip link add type dummy\nip link set lo up\nip link set dummy0 up\ntc qdisc add dev lo parent root handle 1: drr\ntc filter add dev lo parent 1: basic classid 1:1\ntc class add dev lo classid 1:1 drr\ntc qdisc add dev lo parent 1:1 handle 2: netem\ntc qdisc add dev lo parent 2: handle 3: drr\ntc filter add dev lo parent 3: basic classid 3:1 action mirred egress\nredirect dev dummy0\ntc class add dev lo classid 3:1 drr\nping -c1 -W0.01 localhost # Trigger bug\ntc class del dev lo classid 1:1\ntc class add dev lo classid 1:1 drr\nping -c1 -W0.01 localhost # UaF"
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"description" : [
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"lang" : "eng" ,
"value" : "n/a"
}
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}
]
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} ,
"affects" : {
"vendor" : {
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"vendor_name" : "Linux" ,
"product" : {
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"version_affected" : "<" ,
"version_name" : "50612537e9ab" ,
"version_value" : "f0bddb4de043"
} ,
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"version_value" : "not down converted" ,
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"version" : "4.19.322" ,
"lessThanOrEqual" : "4.19.*" ,
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"version" : "5.4.284" ,
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"refsource" : "MISC" ,
"name" : "https://git.kernel.org/stable/c/f0bddb4de043399f16d1969dad5ee5b984a64e7b"
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"url" : "https://git.kernel.org/stable/c/295ad5afd9efc5f67b86c64fce28fb94e26dc4c9" ,
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