VulnerabilityPublished 4 Feb 2026Updated 19 Oct 2026

CVE-2026-23085: Linux kernel · irqchip/gic-v3-its: Avoid truncating memory addresses

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in e332b3b69e5b3acf07204a4b185071bab15c2b88 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:18 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS

0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-06-10.

Patch

Available – fixed in e332b3b69e5b3acf07204a4b185071bab15c2b88, e2f9c751f73a2d5bb62d94ab030aec118a811f27, 85215d633983233809f7d4dad163b953331b8238 +4

Exploitation evidence

Disclosed: evidence found.
CVE published 4 Feb 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.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e, < e332b3b69e5b3acf07204a4b185071bab15c2b88	Fixed in e332b3b69e5b3acf07204a4b185071bab15c2b88
LinuxLinux	Affected ≥ cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e, < e2f9c751f73a2d5bb62d94ab030aec118a811f27	Fixed in e2f9c751f73a2d5bb62d94ab030aec118a811f27
LinuxLinux	Affected ≥ cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e, < 85215d633983233809f7d4dad163b953331b8238	Fixed in 85215d633983233809f7d4dad163b953331b8238
LinuxLinux	Affected ≥ cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e, < 084ba3b99f2dfd991ce7e84fb17117319ec3cd9f	Fixed in 084ba3b99f2dfd991ce7e84fb17117319ec3cd9f
LinuxLinux	Affected ≥ cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e, < 8d76a7d89c12d08382b66e2f21f20d0627d14859	Fixed in 8d76a7d89c12d08382b66e2f21f20d0627d14859
LinuxLinux	Affected ≥ cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e, < 03faa61eb4b9ca9aa09bd91d4c3773d8e7b1ac98	Fixed in 03faa61eb4b9ca9aa09bd91d4c3773d8e7b1ac98

Description

In the Linux kernel, the following vulnerability has been resolved: irqchip/gic-v3-its: Avoid truncating memory addresses On 32-bit machines with CONFIG_ARM_LPAE, it is possible for lowmem allocations to be backed by addresses physical memory above the 32-bit address limit, as found while experimenting with larger VMSPLIT configurations. This caused the qemu virt model to crash in the GICv3 driver, which allocates the 'itt' object using GFP_KERNEL. Since all memory below the 4GB physical address limit is in ZONE_DMA in this configuration, kmalloc() defaults to higher addresses for ZONE_NORMAL, and the ITS driver stores the physical address in a 32-bit 'unsigned long' variable. Change the itt_addr variable to the correct phys_addr_t type instead, along with all other variables in this driver that hold a physical address. The gicv5 driver correctly uses u64 variables, while all other irqchip drivers don't call virt_to_phys or similar interfaces. It's expected that other device drivers have similar issues, but fixing this one is sufficient for booting a virtio based guest.

CWE-190Integer Overflow or Wraparound (opens in a new tab)
Base weaknessLikelihood of exploit: Medium
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
Requirements
Ensure that all protocols are strictly defined, such that all out-of-bounds behavior can be identified simply, and require strict conformance to the protocol.
Requirements · Language Selection
Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V5.4.3 (opens in a new tab)
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
Attack patterns
Forced Integer Overflow (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

WeaknessesCWE-190

Technical details

References

Community reviews

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