Linux · Kernel · CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability
Published . Updated .
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. — Known ransomware use: Unknown
Directly affected
- No company is named in this report.
Indirectly affected
- NVDA NVIDIA
Chip makers and their suppliers move when export rules or Taiwan risk changes
- TSM Taiwan Semiconductor
The main advanced-chip manufacturer sits in Taiwan
- ASML ASML
Chipmaking-equipment sales follow export rules
- AVGO Broadcom
Chip makers and their suppliers move when export rules or Taiwan risk changes
- AMD AMD
Chip makers and their suppliers move when export rules or Taiwan risk changes
- AMAT Applied Materials
Chip-equipment makers feel export controls
- LRCX Lam Research
Chip-equipment makers feel export controls
- SMH VanEck Semiconductor
A fund of semiconductor companies
- SOXX iShares Semiconductor
A fund of semiconductor companies
- QQQ Invesco QQQ
Big tech moves with chip-supply risk
Price reaction, T-5 to T+3
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Foll…
Amplify Cybersecurity Etf (HACK) since this story, compared with the market
Since the first closing price after “Linux · Kernel · CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability,” Amplify Cybersecurity Etf (HACK) is -3.96%. The S&P 500 fund (SPY) is -0.89% over the same days, a -3.07% difference versus the market. technology stocks (XLK) is +3.17%, a -7.13% difference versus that group of stocks.
Filings that name Amplify Cybersecurity Etf (HACK) around 20 Sep 2026
Public disclosure filings, not a recommendation. The filing link is the source document. News use of these reports still sits under 5 U.S.C. § 13107(c).
Who gains and who loses around Amplify Cybersecurity Etf (HACK)
Companies carried with this story
- HACK Amplify Cybersecurity Etf
Amplify Cybersecurity Etf (HACK) is linked, with no stored direction, medium confidence in the 20 Sep 2026 story “Linux · Kernel · CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability.” Reason on file: Material cyber incidents can change cybersecurity spending and risk expectations
- CIBR First Tr Exchange-Traded Fd
For “Linux · Kernel · CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability,” First Tr Exchange-Traded Fd (CIBR) is linked, with no stored direction, medium confidence. Reason on file: Material cyber incidents can change cybersecurity spending and risk expectations
- CGNT Cognyte Software
Cognyte Software (CGNT) is linked, with no stored direction, medium confidence in the 20 Sep 2026 story “Linux · Kernel · CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability.” Reason on file: GA selected CGNT as a RELATED security because its canonical security name directly matches this event's themes: software. This is an explainable DERIVED market relationship, not a claim that the security was named in the source article
- GWRE Guidewire Software
For “Linux · Kernel · CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability,” Guidewire Software (GWRE) is linked, with no stored direction, medium confidence. Reason on file: GA selected GWRE as a RELATED security because its canonical security name directly matches this event's themes: software. This is an explainable DERIVED market relationship, not a claim that the security was named in the source article
- U Unity Software
Unity Software (U) is linked, with no stored direction, medium confidence in the 20 Sep 2026 story “Linux · Kernel · CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability.” Reason on file: GA selected U as a RELATED security because its canonical security name directly matches this event's themes: software. This is an explainable DERIVED market relationship, not a claim that the security was named in the source article
- CHKP Check Point Software Technologies
Check Point Software Technologies (CHKP) is linked, with no stored direction, medium confidence in the 20 Sep 2026 story “Linux · Kernel · CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability.” Reason on file: GA selected CHKP as a RELATED security because its canonical security name directly matches this event's themes: software. This is an explainable DERIVED market relationship, not a claim that the security was named in the source article
- HUBC Hub Cyber Security
In “Linux · Kernel · CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability,” Hub Cyber Security (HUBC) is linked, with no stored direction, medium confidence. Reason on file: GA selected HUBC as a RELATED security because its canonical security name directly matches this event's themes: cyber. This is an explainable DERIVED market relationship, not a claim that the security was named in the source article
- PRGS Progress Software
In “Linux · Kernel · CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability,” Progress Software (PRGS) is linked, with no stored direction, medium confidence. Reason on file: GA selected PRGS as a RELATED security because its canonical security name directly matches this event's themes: software. This is an explainable DERIVED market relationship, not a claim that the security was named in the source article
How semiconductors news reaches Amplify Cybersecurity Etf (HACK)
“Linux · Kernel · CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability” (20 Sep 2026) reaches Amplify Cybersecurity Etf (HACK) through Semiconductors.
Amplify Cybersecurity Etf (HACK) is on the page because Material cyber incidents can change cybersecurity spending and risk expectations
A second company, First Tr Exchange-Traded Fd (CIBR), is listed for a different reason: Material cyber incidents can change cybersecurity spending and risk expectations
What this semiconductors story puts on the calendar
CGNT traded between 8.21 and 9.01 across 20 sessions. The latest close on file is 8.72. CIBR traded between 98.09 and 110.59 across 20 sessions. The latest close on file is 99.91. HACK traded between 115.90 and 131.37 across 20 sessions. The latest close on file is 118.03.
What the saved facts support for Amplify Cybersecurity Etf (HACK)
46 out of 100
“Linux · Kernel · CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability” scores 46 out of 100. The score uses 1 sources, and 8 linked companies.