CVE-2026-72153: Linux kernel · irqchip/crossbar: Use correct index in crossbar_domain_free()
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 5.15.0-1117.124~20.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 14:05 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.15.0-1117.124~20.04.1, 5.15.0-1123.132~20.04.1, 5.15.0-1122.131~20.04.1 +41
Exploitation evidence
Disclosed: evidence found.
CVE published 15 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A patch is available and should be applied to affected linux-aws kernel versions. The vendor advisory confirms that the issue has been resolved in updated kernel releases. Users should update to the fixed versions to mitigate this vulnerability.
Description
A vulnerability in the Linux kernel's irqchip/crossbar subsystem was fixed. The flaw involved incorrect indexing in the crossbar_domain_free() function, which failed to free the correct interrupt index and could lead to improper handling of interrupt mappings. This could potentially cause out-of-bounds access due to using the wrong interrupt number as an index. The issue affects specific linux-aws kernel versions and has been addressed by using the correct GIC SPI index from the parent domain's irq_data.
References
- nvd.nist.gov/vuln/detail/CVE-2026-72153 (opens in a new tab)
- git.kernel.org/stable/c/043db005a8d6932dc7d217c86307e9af0bc10ddc (opens in a new tab)
- git.kernel.org/stable/c/13bdb5140405ff283f9052e65ee1d5c2303765c7 (opens in a new tab)
- git.kernel.org/stable/c/1c48dc6a0c1ef47a9fa24611e60bc2f4ee4dd0df (opens in a new tab)
- git.kernel.org/stable/c/36ca587f55a2c04468a89fd16174bb2f78dc04ec (opens in a new tab)
- git.kernel.org/stable/c/424130169dc03b84ea604685409726d61bcec859 (opens in a new tab)
- git.kernel.org/stable/c/cca649a23a5fc8aae536fc27a0546c67690a4078 (opens in a new tab)
- git.kernel.org/stable/c/ccc3664679763d2d6f067c28729bdff627bb72d0 (opens in a new tab)
- git.kernel.org/stable/c/e5be5d452d5f1efbb3342da2b00029be6c99034e (opens in a new tab)
- ubuntu.com/security/CVE-2026-72153 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-72153 (opens in a new tab)
- git.kernel.org/linus/043db005a8d6932dc7d217c86307e9af0bc10ddc (opens in a new tab)
- ubuntu.com/security/notices/USN-8876-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8878-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8879-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8877-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8875-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8889-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-2 (opens in a new tab)