Answer in brief
CVE-2022-49555 records a High severity (CVSS 7.8) vulnerability in Bluetooth: hci_qca: Use del_timer_sync() before freeing. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). 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 7.8. 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). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0ff252c1976da5d80db1377eb39b551931e61826 <4989bb03342941f2b730b37dfa38bce27b543661 || >=0ff252c1976da5d80db1377eb39b551931e61826 <db03727b4bbbbb36e6ef4cb655c670eefb6448e9 || >=0ff252c1976da5d80db1377eb39b551931e61826 <37d17f63d085d601011964ade7371aeebeb6ed4b || >=0ff252c1976da5d80db1377eb39b551931e61826 <2717654ae022e6ea959a4b7b762702fe1a4690c2 || >=0ff252c1976da5d80db1377eb39b551931e61826 <72ef98445aca568a81c2da050532500a8345ad3a | 4989bb03342941f2b730b37dfa38bce27b543661, db03727b4bbbbb36e6ef4cb655c670eefb6448e9, 37d17f63d085d601011964ade7371aeebeb6ed4b, 2717654ae022e6ea959a4b7b762702fe1a4690c2, 72ef98445aca568a81c2da050532500a8345ad3a |
| Linux/Linuxgeneric | 4.3 | Not reported |
Published upstream
Feb 26, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_qca: Use del_timer_sync() before freeing While looking at a crash report on a timer list being corrupted, which usually happens when a timer is freed while still active. This is commonly triggered by code calling del_timer() instead of del_timer_sync() just before freeing. One possible culprit is the hci_qca driver, which does exactly that. Eric mentioned that wake_retrans_timer could be rearmed via the work queue, so also move the destruction of the work queue before del_timer_sync().
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2022-49555 records a High severity (CVSS 7.8) vulnerability in Bluetooth: hci_qca: Use del_timer_sync() before freeing. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). 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 7.8. 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). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0ff252c1976da5d80db1377eb39b551931e61826 <4989bb03342941f2b730b37dfa38bce27b543661 || >=0ff252c1976da5d80db1377eb39b551931e61826 <db03727b4bbbbb36e6ef4cb655c670eefb6448e9 || >=0ff252c1976da5d80db1377eb39b551931e61826 <37d17f63d085d601011964ade7371aeebeb6ed4b || >=0ff252c1976da5d80db1377eb39b551931e61826 <2717654ae022e6ea959a4b7b762702fe1a4690c2 || >=0ff252c1976da5d80db1377eb39b551931e61826 <72ef98445aca568a81c2da050532500a8345ad3a | 4989bb03342941f2b730b37dfa38bce27b543661, db03727b4bbbbb36e6ef4cb655c670eefb6448e9, 37d17f63d085d601011964ade7371aeebeb6ed4b, 2717654ae022e6ea959a4b7b762702fe1a4690c2, 72ef98445aca568a81c2da050532500a8345ad3a |
| Linux/Linuxgeneric | 4.3 | Not reported |
Published upstream
Feb 26, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_qca: Use del_timer_sync() before freeing While looking at a crash report on a timer list being corrupted, which usually happens when a timer is freed while still active. This is commonly triggered by code calling del_timer() instead of del_timer_sync() just before freeing. One possible culprit is the hci_qca driver, which does exactly that. Eric mentioned that wake_retrans_timer could be rearmed via the work queue, so also move the destruction of the work queue before del_timer_sync().
Quoted source text, attributed separately from HOL analysis.