Answer in brief
CVE-2026-23454 records a High severity (CVSS 7.0) vulnerability in net: mana: fix use-after-free in mana_hwc_destroy_channel() by reordering teardown. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (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-2026-23454 records a High severity (CVSS 7.0) vulnerability in net: mana: fix use-after-free in mana_hwc_destroy_channel() by reordering teardown. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (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.
CVSS is 7.0. 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/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <b88edf12fc3779521ae5f6f1584153b15f7da6df || >=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <e23bf444512cb85d76012080a76cd1f9e967448e || >=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <249e905571583a434d4ea8d6f92ccc0eef337115 || >=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <2b001901f689021acd7bf2dceed74a1bdcaaa1f9 || >=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <afdb1533eb9c05432aeb793a7280fa827c502f5c || >=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <05d345719d85b927cba74afac4d5322de3aa4256 || >=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <fa103fc8f56954a60699a29215cb713448a39e87 | b88edf12fc3779521ae5f6f1584153b15f7da6df, e23bf444512cb85d76012080a76cd1f9e967448e, 249e905571583a434d4ea8d6f92ccc0eef337115, 2b001901f689021acd7bf2dceed74a1bdcaaa1f9, afdb1533eb9c05432aeb793a7280fa827c502f5c, 05d345719d85b927cba74afac4d5322de3aa4256, fa103fc8f56954a60699a29215cb713448a39e87 |
| Linux/Linuxgeneric | 5.13 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
Published upstream
Apr 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 14, 2026
In the Linux kernel, the following vulnerability has been resolved: net: mana: fix use-after-free in mana_hwc_destroy_channel() by reordering teardown A potential race condition exists in mana_hwc_destroy_channel() where hwc->caller_ctx is freed before the HWC's Completion Queue (CQ) and Event Queue (EQ) are destroyed. This allows an in-flight CQ interrupt handler to dereference freed memory, leading to a use-after-free or NULL pointer dereference in mana_hwc_handle_resp(). mana_smc_teardown_hwc() signals the hardware to stop but does not synchronize against IRQ handlers already executing on other CPUs. The IRQ synchronization only happens in mana_hwc_destroy_cq() via mana_gd_destroy_eq() -> mana_gd_deregister_irq(). Since this runs after kfree(hwc->caller_ctx), a concurrent mana_hwc_rx_event_handler() can dereference freed caller_ctx (and rxq->msg_buf) in mana_hwc_handle_resp(). Fix this by reordering teardown to reverse-of-creation order: destroy the TX/RX work queues and CQ/EQ before freeing hwc->caller_ctx. This ensures all in-flight interrupt handlers complete before the memory they access is freed.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.0. 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/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <b88edf12fc3779521ae5f6f1584153b15f7da6df || >=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <e23bf444512cb85d76012080a76cd1f9e967448e || >=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <249e905571583a434d4ea8d6f92ccc0eef337115 || >=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <2b001901f689021acd7bf2dceed74a1bdcaaa1f9 || >=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <afdb1533eb9c05432aeb793a7280fa827c502f5c || >=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <05d345719d85b927cba74afac4d5322de3aa4256 || >=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <fa103fc8f56954a60699a29215cb713448a39e87 | b88edf12fc3779521ae5f6f1584153b15f7da6df, e23bf444512cb85d76012080a76cd1f9e967448e, 249e905571583a434d4ea8d6f92ccc0eef337115, 2b001901f689021acd7bf2dceed74a1bdcaaa1f9, afdb1533eb9c05432aeb793a7280fa827c502f5c, 05d345719d85b927cba74afac4d5322de3aa4256, fa103fc8f56954a60699a29215cb713448a39e87 |
| Linux/Linuxgeneric | 5.13 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
Published upstream
Apr 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 14, 2026
In the Linux kernel, the following vulnerability has been resolved: net: mana: fix use-after-free in mana_hwc_destroy_channel() by reordering teardown A potential race condition exists in mana_hwc_destroy_channel() where hwc->caller_ctx is freed before the HWC's Completion Queue (CQ) and Event Queue (EQ) are destroyed. This allows an in-flight CQ interrupt handler to dereference freed memory, leading to a use-after-free or NULL pointer dereference in mana_hwc_handle_resp(). mana_smc_teardown_hwc() signals the hardware to stop but does not synchronize against IRQ handlers already executing on other CPUs. The IRQ synchronization only happens in mana_hwc_destroy_cq() via mana_gd_destroy_eq() -> mana_gd_deregister_irq(). Since this runs after kfree(hwc->caller_ctx), a concurrent mana_hwc_rx_event_handler() can dereference freed caller_ctx (and rxq->msg_buf) in mana_hwc_handle_resp(). Fix this by reordering teardown to reverse-of-creation order: destroy the TX/RX work queues and CQ/EQ before freeing hwc->caller_ctx. This ensures all in-flight interrupt handlers complete before the memory they access is freed.
Quoted source text, attributed separately from HOL analysis.