CVE - CVE-2024-53057

CVE-ID
CVE-2024-53057	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: stop qdisc_tree_reduce_backlog on TC_H_ROOT In qdisc_tree_reduce_backlog, Qdiscs with major handle ffff: are assumed to be either root or ingress. This assumption is bogus since it's valid to create egress qdiscs with major handle ffff: Budimir Markovic found that for qdiscs like DRR that maintain an active class list, it will cause a UAF with a dangling class pointer. In 066a3b5b2346, the concern was to avoid iterating over the ingress qdisc since its parent is itself. The proper fix is to stop when parent TC_H_ROOT is reached because the only way to retrieve ingress is when a hierarchy which does not contain a ffff: major handle call into qdisc_lookup with TC_H_MAJ(TC_H_ROOT). In the scenario where major ffff: is an egress qdisc in any of the tree levels, the updates will also propagate to TC_H_ROOT, which then the iteration must stop. net/sched/sch_api.c \| 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/05df1b1dff8f197f1c275b57ccb2ca33021df552 URL:https://git.kernel.org/stable/c/05df1b1dff8f197f1c275b57ccb2ca33021df552 MISC:https://git.kernel.org/stable/c/2e95c4384438adeaa772caa560244b1a2efef816 URL:https://git.kernel.org/stable/c/2e95c4384438adeaa772caa560244b1a2efef816 MISC:https://git.kernel.org/stable/c/580b3189c1972aff0f993837567d36392e9d981b URL:https://git.kernel.org/stable/c/580b3189c1972aff0f993837567d36392e9d981b MISC:https://git.kernel.org/stable/c/597cf9748c3477bf61bc35f0634129f56764ad24 URL:https://git.kernel.org/stable/c/597cf9748c3477bf61bc35f0634129f56764ad24 MISC:https://git.kernel.org/stable/c/9995909615c3431a5304c1210face5f268d24dba URL:https://git.kernel.org/stable/c/9995909615c3431a5304c1210face5f268d24dba MISC:https://git.kernel.org/stable/c/ce691c814bc7a3c30c220ffb5b7422715458fd9b URL:https://git.kernel.org/stable/c/ce691c814bc7a3c30c220ffb5b7422715458fd9b MISC:https://git.kernel.org/stable/c/dbe778b08b5101df9e89bc06e0a3a7ecd2f4ef20 URL:https://git.kernel.org/stable/c/dbe778b08b5101df9e89bc06e0a3a7ecd2f4ef20 MISC:https://git.kernel.org/stable/c/e7f9a6f97eb067599a74f3bcb6761976b0ed303e URL:https://git.kernel.org/stable/c/e7f9a6f97eb067599a74f3bcb6761976b0ed303e
Assigning CNA
kernel.org
Date Record Created
20241119	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241119)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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