CVE-2024-53057net/sched: stop qdisc_tree_reduce_backlog on TC_H_ROOT
Updated under an hour ago ()
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It affects Linux and 8 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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(-)
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-416
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from 066a3b5b2346febf9a655b444567b7138e3bb939 before e7f9a6f97eb067599a74f3bcb6761976b0ed303e; from 066a3b5b2346febf9a655b444567b7138e3bb939 before dbe778b08b5101df9e89bc06e0a3a7ecd2f4ef20; from 066a3b5b2346febf9a655b444567b7138e3bb939 before ce691c814bc7a3c30c220ffb5b7422715458fd9b; 066a3b5b2346febf9a655b444567b7138e3bb939 builds before 05df1b1dff8f197f1c275b57ccb2ca33021df552; from 066a3b5b2346febf9a655b444567b7138e3bb939 before 580b3189c1972aff0f993837567d36392e9d981b; from 066a3b5b2346febf9a655b444567b7138e3bb939 before 597cf9748c3477bf61bc35f0634129f56764ad24; from 066a3b5b2346febf9a655b444567b7138e3bb939 before 9995909615c3431a5304c1210face5f268d24dba; 066a3b5b2346febf9a655b444567b7138e3bb939 builds before 2e95c4384438adeaa772caa560244b1a2efef816 | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | before V1.1.1 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens RUGGEDCOM RST2428P siemens:ruggedcom_rst2428p (from the name) | before V3.2 | CISA ADP |
Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family siemens:scalance_xc_300_xr_300_xc_400_xr_500wg_xr_500_family (from the name) | before V3.2 | CISA ADP |
Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family siemens:scalance_xcm_xrm_xch_xrh_300_family (from the name) | before V3.2 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 2.6.25 before 4.19.323; from 4.20 before 5.4.285; from 5.5 before 5.10.229; from 5.11 before 5.15.171; from 5.16 before 6.1.116; from 6.2 before 6.6.60; from 6.7 before 6.11.7; 6.12; and 4 more ranges | NVD |
References
- https://git.kernel.org/stable/c/e7f9a6f97eb067599a74f3bcb6761976b0ed303epatch
- https://git.kernel.org/stable/c/dbe778b08b5101df9e89bc06e0a3a7ecd2f4ef20patch
- https://git.kernel.org/stable/c/ce691c814bc7a3c30c220ffb5b7422715458fd9bpatch
- https://git.kernel.org/stable/c/05df1b1dff8f197f1c275b57ccb2ca33021df552patch
- https://git.kernel.org/stable/c/580b3189c1972aff0f993837567d36392e9d981bpatch
- https://git.kernel.org/stable/c/597cf9748c3477bf61bc35f0634129f56764ad24patch
- https://git.kernel.org/stable/c/9995909615c3431a5304c1210face5f268d24dbapatch
- https://git.kernel.org/stable/c/2e95c4384438adeaa772caa560244b1a2efef816patch
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.