Description (CNA)
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
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 50612537e9ab29693122fab20fc1eed235054ffe before f0bddb4de043399f16d1969dad5ee5b984a64e7b; affected 50612537e9ab29693122fab20fc1eed235054ffe before 295ad5afd9efc5f67b86c64fce28fb94e26dc4c9; affected 50612537e9ab29693122fab20fc1eed235054ffe before 98c75d76187944296068d685dfd8a1e9fd8c4fdc; affected 50612537e9ab29693122fab20fc1eed235054ffe before 14f91ab8d391f249b845916820a56f42cf747241; affected 50612537e9ab29693122fab20fc1eed235054ffe before db2c235682913a63054e741fe4e19645fdf2d68e; affected 50612537e9ab29693122fab20fc1eed235054ffe before dde33a9d0b80aae0c69594d1f462515d7ff1cb3d; affected 50612537e9ab29693122fab20fc1eed235054ffe before 32008ab989ddcff1a485fa2b4906234c25dc5cd6; affected 50612537e9ab29693122fab20fc1eed235054ffe before 3b3a2a9c6349e25a025d2330f479bc33a6ccb54a |
| Linux / Linux | affected 3.3; unaffected 0 before 3.3; unaffected 4.19.322 through 4.19.*; unaffected 5.4.284 through 5.4.*; unaffected 5.10.226 through 5.10.*; unaffected 5.15.167 through 5.15.*; unaffected 6.1.110 through 6.1.*; unaffected 6.6.51 through 6.6.*; unaffected 6.10.10 through 6.10.*; unaffected 6.11 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/f0bddb4de043399f16d1969dad5ee5b984a64e7b
- https://git.kernel.org/stable/c/295ad5afd9efc5f67b86c64fce28fb94e26dc4c9
- https://git.kernel.org/stable/c/98c75d76187944296068d685dfd8a1e9fd8c4fdc
- https://git.kernel.org/stable/c/14f91ab8d391f249b845916820a56f42cf747241
- https://git.kernel.org/stable/c/db2c235682913a63054e741fe4e19645fdf2d68e
- https://git.kernel.org/stable/c/dde33a9d0b80aae0c69594d1f462515d7ff1cb3d
- https://git.kernel.org/stable/c/32008ab989ddcff1a485fa2b4906234c25dc5cd6
- https://git.kernel.org/stable/c/3b3a2a9c6349e25a025d2330f479bc33a6ccb54a
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.