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NVD / CVE Program· CNA Linux

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

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.14% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 03faa61eb4b9ca9aa09bd91d4c3773d8e7b1ac98, 084ba3b99f2dfd991ce7e84fb17117319ec3cd9f, 1b323391560354d8c515de8658b057a1daa82adb.

Low priority for now. Upgrade to Linux Linux 03faa61eb4b9ca9aa09bd91d4c3773d8e7b1ac98, 084ba3b99f2dfd991ce7e84fb17117319ec3cd9f, 1b323391560354d8c515de8658b057a1daa82adb or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 4, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 3th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-23085

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel3.19 and later · before 5.10.249
  • linux linux kernel5.11 and later · before 5.15.199
  • linux linux kernel5.16 and later · before 6.1.162
  • linux linux kernel6.2 and later · before 6.6.122
  • linux linux kernel6.7 and later · before 6.12.68
  • linux linux kernel6.13 and later · before 6.18.8
  • linux linux kernel6.19

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.19affected
    • cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e and later · before e332b3b69e5b3acf07204a4b185071bab15c2b88affected · git
    • cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e and later · before e2f9c751f73a2d5bb62d94ab030aec118a811f27affected · git
    • cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e and later · before 85215d633983233809f7d4dad163b953331b8238affected · git
    • cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e and later · before 1b323391560354d8c515de8658b057a1daa82adbaffected · git
    • cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e and later · before 084ba3b99f2dfd991ce7e84fb17117319ec3cd9faffected · git
    • cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e and later · before 03faa61eb4b9ca9aa09bd91d4c3773d8e7b1ac98affected · git
    • cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e and later · before 8d76a7d89c12d08382b66e2f21f20d0627d14859affected · git
    • before 3.19not affected · semver
    • 5.10.249 and later · up to and including 5.10.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.162-16.1.162-1
Debian:13linuxbefore 6.12.69-16.12.69-1
Debian:14linuxbefore 6.18.8-16.18.8-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-23083Feb 4, 2026 · fou: Don't allow 0 for FOU_ATTR_IPPROTO.
    31Monitor
  • ← EarlierCVE-2026-23084Feb 4, 2026 · be2net: Fix NULL pointer dereference in be_cmd_get_mac_from_list
    22Monitor
  • Later →CVE-2026-23086Feb 4, 2026 · vsock/virtio: cap TX credit to local buffer size
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux03faa61eb4b9ca9aa09bd91d4c3773d8e7b1ac98Vendor (CNA)
Linux Linux084ba3b99f2dfd991ce7e84fb17117319ec3cd9fVendor (CNA)
Linux Linux1b323391560354d8c515de8658b057a1daa82adbVendor (CNA)
Linux Linux85215d633983233809f7d4dad163b953331b8238Vendor (CNA)
Linux Linux8d76a7d89c12d08382b66e2f21f20d0627d14859Vendor (CNA)
Linux Linuxe2f9c751f73a2d5bb62d94ab030aec118a811f27Vendor (CNA)
Linux Linuxe332b3b69e5b3acf07204a4b185071bab15c2b88Vendor (CNA)
debian:linux6.1.162-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-3163379 days apartrxrpc: Fix integer overflow in rxgk_verify_response()
    39Monitor
  • CVE-2026-3164979 days apartnet: stmmac: fix integer underflow in chain mode
    39Monitor
  • CVE-2026-3165979 days apartbatman-adv: reject oversized global TT response buffers
    39Monitor
  • CVE-2026-4334193 days apartnet/ipv6: ioam6: prevent schema length wraparound in trace fill
    39Monitor
  • CVE-2026-46039112 days apartrxgk: Fix potential integer overflow in length check
    39Monitor
  • CVE-2026-46325125 days apartRDMA/rxe: Fix iova-to-va conversion for MR page sizes != PAGE_SIZE
    39Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-190 · Integer Overflow or Wraparound

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records