Answer in brief
CVE-2024-53057 records a Unknown severity vulnerability in net/sched: stop qdisc_tree_reduce_backlog on TC_H_ROOT. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/RUGGEDCOM RST2428P (generic), Siemens/SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2024-53057 records a Unknown severity vulnerability in net/sched: stop qdisc_tree_reduce_backlog on TC_H_ROOT. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/RUGGEDCOM RST2428P (generic), Siemens/SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/RUGGEDCOM RST2428P (generic), Siemens/SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=066a3b5b2346febf9a655b444567b7138e3bb939 <e7f9a6f97eb067599a74f3bcb6761976b0ed303e || >=066a3b5b2346febf9a655b444567b7138e3bb939 <dbe778b08b5101df9e89bc06e0a3a7ecd2f4ef20 || >=066a3b5b2346febf9a655b444567b7138e3bb939 <ce691c814bc7a3c30c220ffb5b7422715458fd9b || >=066a3b5b2346febf9a655b444567b7138e3bb939 <05df1b1dff8f197f1c275b57ccb2ca33021df552 || >=066a3b5b2346febf9a655b444567b7138e3bb939 <580b3189c1972aff0f993837567d36392e9d981b || >=066a3b5b2346febf9a655b444567b7138e3bb939 <597cf9748c3477bf61bc35f0634129f56764ad24 || >=066a3b5b2346febf9a655b444567b7138e3bb939 <9995909615c3431a5304c1210face5f268d24dba || >=066a3b5b2346febf9a655b444567b7138e3bb939 <2e95c4384438adeaa772caa560244b1a2efef816 | e7f9a6f97eb067599a74f3bcb6761976b0ed303e, dbe778b08b5101df9e89bc06e0a3a7ecd2f4ef20, ce691c814bc7a3c30c220ffb5b7422715458fd9b, 05df1b1dff8f197f1c275b57ccb2ca33021df552, 580b3189c1972aff0f993837567d36392e9d981b, 597cf9748c3477bf61bc35f0634129f56764ad24, 9995909615c3431a5304c1210face5f268d24dba, 2e95c4384438adeaa772caa560244b1a2efef816 |
| Linux/Linuxgeneric | 2.6.25 | Not reported |
| Siemens/RUGGEDCOM RST2428Pgeneric | >=0 <V3.2 | V3.2 |
| Siemens/SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 familygeneric | >=0 <V3.2 | V3.2 |
| Siemens/SCALANCE XCM-/XRM-/XCH-/XRH-300 familygeneric | >=0 <V3.2 | V3.2 |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.0 <V3.1.5 | V3.1.5 |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.0 <V3.1.5 | V3.1.5 |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.0 <V3.1.5 | V3.1.5 |
Published upstream
Nov 19, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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(-)
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/RUGGEDCOM RST2428P (generic), Siemens/SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=066a3b5b2346febf9a655b444567b7138e3bb939 <e7f9a6f97eb067599a74f3bcb6761976b0ed303e || >=066a3b5b2346febf9a655b444567b7138e3bb939 <dbe778b08b5101df9e89bc06e0a3a7ecd2f4ef20 || >=066a3b5b2346febf9a655b444567b7138e3bb939 <ce691c814bc7a3c30c220ffb5b7422715458fd9b || >=066a3b5b2346febf9a655b444567b7138e3bb939 <05df1b1dff8f197f1c275b57ccb2ca33021df552 || >=066a3b5b2346febf9a655b444567b7138e3bb939 <580b3189c1972aff0f993837567d36392e9d981b || >=066a3b5b2346febf9a655b444567b7138e3bb939 <597cf9748c3477bf61bc35f0634129f56764ad24 || >=066a3b5b2346febf9a655b444567b7138e3bb939 <9995909615c3431a5304c1210face5f268d24dba || >=066a3b5b2346febf9a655b444567b7138e3bb939 <2e95c4384438adeaa772caa560244b1a2efef816 | e7f9a6f97eb067599a74f3bcb6761976b0ed303e, dbe778b08b5101df9e89bc06e0a3a7ecd2f4ef20, ce691c814bc7a3c30c220ffb5b7422715458fd9b, 05df1b1dff8f197f1c275b57ccb2ca33021df552, 580b3189c1972aff0f993837567d36392e9d981b, 597cf9748c3477bf61bc35f0634129f56764ad24, 9995909615c3431a5304c1210face5f268d24dba, 2e95c4384438adeaa772caa560244b1a2efef816 |
| Linux/Linuxgeneric | 2.6.25 | Not reported |
| Siemens/RUGGEDCOM RST2428Pgeneric | >=0 <V3.2 | V3.2 |
| Siemens/SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 familygeneric | >=0 <V3.2 | V3.2 |
| Siemens/SCALANCE XCM-/XRM-/XCH-/XRH-300 familygeneric | >=0 <V3.2 | V3.2 |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.0 <V3.1.5 | V3.1.5 |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.0 <V3.1.5 | V3.1.5 |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.0 <V3.1.5 | V3.1.5 |
Published upstream
Nov 19, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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(-)
Quoted source text, attributed separately from HOL analysis.