CVE-2024-46800 (GCVE-0-2024-46800)

Vulnerability from cvelistv5 – Published: 2024-09-18 07:12 – Updated: 2025-11-03 22:18
VLAI?
Title
sch/netem: fix use after free in netem_dequeue
Summary
In the Linux kernel, the following vulnerability has been resolved: sch/netem: fix use after free in netem_dequeue If netem_dequeue() enqueues packet to inner qdisc and that qdisc returns __NET_XMIT_STOLEN. The packet is dropped but qdisc_tree_reduce_backlog() is not called to update the parent's q.qlen, leading to the similar use-after-free as Commit e04991a48dbaf382 ("netem: fix return value if duplicate enqueue fails") Commands to trigger KASAN UaF: ip link add type dummy ip link set lo up ip link set dummy0 up tc qdisc add dev lo parent root handle 1: drr tc filter add dev lo parent 1: basic classid 1:1 tc class add dev lo classid 1:1 drr tc qdisc add dev lo parent 1:1 handle 2: netem tc qdisc add dev lo parent 2: handle 3: drr tc filter add dev lo parent 3: basic classid 3:1 action mirred egress redirect dev dummy0 tc class add dev lo classid 3:1 drr ping -c1 -W0.01 localhost # Trigger bug tc class del dev lo classid 1:1 tc class add dev lo classid 1:1 drr ping -c1 -W0.01 localhost # UaF
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 50612537e9ab29693122fab20fc1eed235054ffe , < f0bddb4de043399f16d1969dad5ee5b984a64e7b (git)
Affected: 50612537e9ab29693122fab20fc1eed235054ffe , < 295ad5afd9efc5f67b86c64fce28fb94e26dc4c9 (git)
Affected: 50612537e9ab29693122fab20fc1eed235054ffe , < 98c75d76187944296068d685dfd8a1e9fd8c4fdc (git)
Affected: 50612537e9ab29693122fab20fc1eed235054ffe , < 14f91ab8d391f249b845916820a56f42cf747241 (git)
Affected: 50612537e9ab29693122fab20fc1eed235054ffe , < db2c235682913a63054e741fe4e19645fdf2d68e (git)
Affected: 50612537e9ab29693122fab20fc1eed235054ffe , < dde33a9d0b80aae0c69594d1f462515d7ff1cb3d (git)
Affected: 50612537e9ab29693122fab20fc1eed235054ffe , < 32008ab989ddcff1a485fa2b4906234c25dc5cd6 (git)
Affected: 50612537e9ab29693122fab20fc1eed235054ffe , < 3b3a2a9c6349e25a025d2330f479bc33a6ccb54a (git)
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    Linux Linux Affected: 3.3
Unaffected: 0 , < 3.3 (semver)
Unaffected: 4.19.322 , ≤ 4.19.* (semver)
Unaffected: 5.4.284 , ≤ 5.4.* (semver)
Unaffected: 5.10.226 , ≤ 5.10.* (semver)
Unaffected: 5.15.167 , ≤ 5.15.* (semver)
Unaffected: 6.1.110 , ≤ 6.1.* (semver)
Unaffected: 6.6.51 , ≤ 6.6.* (semver)
Unaffected: 6.10.10 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
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  • 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.
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Detection rules are retrieved from Rulezet.