01 Record

CVE-2026-64073

irq_work: Fix use-after-free in irq_work_single() on PREEMPT_RT

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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02 Description

irq_work: Fix use-after-free in irq_work_single() on PREEMPT_RT

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.13% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 2.7% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-10-19.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-07-19 15:39Z3 MO AGO

Last updated

2026-10-19 20:28Z9 DAYS AGO

Reserved

2026-07-19

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

CWE-416Use After FreeVariant
CWE-364Signal Handler Race ConditionBase

Data version

5.2

Document digest

756b05927a41d9303a4520401aeef7c9abdab25261e287ab41b5a4573ec14d49

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux810979682ccc98dbd83f341c18a2e556c30a7164 to < 2dc79362302922cb18f35e262712b5e58de65442, 810979682ccc98dbd83f341c18a2e556c30a7164 to < eef4f71b46a9929ac33e968538c9dd5d96a02460, 810979682ccc98dbd83f341c18a2e556c30a7164 to < 684a78183c54c23e70d1cba320f7fc184604210b, 810979682ccc98dbd83f341c18a2e556c30a7164 to < 18c0456ea2615b1a743a6db739c74411c3b42bc6, 810979682ccc98dbd83f341c18a2e556c30a7164 to < 81b582784518196eff1050212a046bc29d3a05dd, 810979682ccc98dbd83f341c18a2e556c30a7164 to < 91840be8f710370607f949a627e070896faeddb8, 5.16—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/2dc79362302922cb18f35e262712b5e58de65442
git.kernel.orghttps://git.kernel.org/stable/c/eef4f71b46a9929ac33e968538c9dd5d96a02460
git.kernel.orghttps://git.kernel.org/stable/c/684a78183c54c23e70d1cba320f7fc184604210b
git.kernel.orghttps://git.kernel.org/stable/c/18c0456ea2615b1a743a6db739c74411c3b42bc6
git.kernel.orghttps://git.kernel.org/stable/c/81b582784518196eff1050212a046bc29d3a05dd
git.kernel.orghttps://git.kernel.org/stable/c/91840be8f710370607f949a627e070896faeddb8

07 Fixed in

Debian 12

linux
Fixed in 6.1.176-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.94-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 7.0.12-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.