Is CVE-2025-68368 in the CISA KEV catalog?

No. CVE-2025-68368 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the EPSS score for CVE-2025-68368?

CVE-2025-68368 has an EPSS score of 0.14% (4th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-68368?

Upgrade linux on debian unstable to 6.18.3-1 or later. Fixes are available for 61 affected products.

CVE & CISA-KEV Catalog

CVE-2025-68368

UNSCORED

NVD

Description

In the Linux kernel, the following vulnerability has been resolved: md: init bioset in mddev_init IO operations may be needed before md_run(), such as updating metadata after writing sysfs. Without bioset, this triggers a NULL pointer dereference as below: BUG: kernel NULL pointer dereference, address: 0000000000000020 Call Trace: md_update_sb+0x658/0xe00 new_level_store+0xc5/0x120 md_attr_store+0xc9/0x1e0 sysfs_kf_write+0x6f/0xa0 kernfs_fop_write_iter+0x141/0x2a0 vfs_write+0x1fc/0x5a0 ksys_write+0x79/0x180 __x64_sys_write+0x1d/0x30 x64_sys_call+0x2818/0x2880 do_syscall_64+0xa9/0x580 entry_SYSCALL_64_after_hwframe+0x4b/0x53 Reproducer ``` mdadm -CR /dev/md0 -l1 -n2 /dev/sd[cd] echo inactive > /sys/block/md0/md/array_state echo 10 > /sys/block/md0/md/new_level ``` mddev_init() can only be called once per mddev, no need to test if bioset has been initialized anymore.

How to fix

Remediation Available

linuxDebian

Fixed in:6.18.3-1CVE-2025-68368

linuxUbuntu

Fixed in:6.17.0-22.22USN-8177-1

linux-awsUbuntu

Fixed in:6.17.0-1012.12USN-8183-2

linux-aws-6.17Ubuntu

Fixed in:6.17.0-1012.12~24.04.1USN-8183-2

linux-azureUbuntu

Fixed in:6.17.0-1013.13USN-8245-1

linux-azure-6.17Ubuntu

Fixed in:6.17.0-1013.13~24.04.1USN-8245-1

linux-gcpUbuntu

Fixed in:6.17.0-1012.12USN-8183-1

linux-gcp-6.17Ubuntu

Fixed in:6.17.0-1012.12~24.04.1USN-8183-1

linux-hwe-6.17Ubuntu

Fixed in:6.17.0-22.22~24.04.1USN-8183-2

linux-image-6.17.0-1010-realtimeUbuntu

Fixed in:6.17.0-1010.11~24.04.1USN-8177-2

Fixed in:6.17.0-1010.11USN-8177-1

linux-image-6.17.0-1011-oracleUbuntu

Fixed in:6.17.0-1011.11~24.04.1USN-8183-2

Fixed in:6.17.0-1011.11USN-8183-2

linux-image-6.17.0-1011-oracle-64kUbuntu

Fixed in:6.17.0-1011.11~24.04.1USN-8183-2

Fixed in:6.17.0-1011.11USN-8183-2

linux-image-6.17.0-1012-awsUbuntu

Fixed in:6.17.0-1012.12~24.04.1USN-8183-2

Fixed in:6.17.0-1012.12USN-8183-2

linux-image-6.17.0-1012-aws-64kUbuntu

Fixed in:6.17.0-1012.12~24.04.1USN-8183-2

Fixed in:6.17.0-1012.12USN-8183-2

linux-image-6.17.0-1012-gcpUbuntu

Fixed in:6.17.0-1012.12~24.04.1USN-8183-1

Fixed in:6.17.0-1012.12USN-8183-1

linux-image-6.17.0-1012-gcp-64kUbuntu

Fixed in:6.17.0-1012.12~24.04.1USN-8183-1

Fixed in:6.17.0-1012.12USN-8183-1

linux-image-6.17.0-1013-azureUbuntu

Fixed in:6.17.0-1013.13~24.04.1USN-8245-1

Fixed in:6.17.0-1013.13USN-8245-1

linux-image-6.17.0-1014-raspiUbuntu

Fixed in:6.17.0-1014.14USN-8257-1

linux-image-6.17.0-1020-oemUbuntu

Fixed in:6.17.0-1020.20USN-8245-1

linux-image-6.17.0-22-genericUbuntu

Fixed in:6.17.0-22.22~24.04.1USN-8183-2

Fixed in:6.17.0-22.22USN-8177-1

linux-image-6.17.0-22-generic-64kUbuntu

Fixed in:6.17.0-22.22~24.04.1USN-8183-2

Fixed in:6.17.0-22.22USN-8177-1

linux-image-awsUbuntu

Fixed in:6.17.0-1012.12~24.04.1USN-8183-2

Fixed in:6.17.0-1012.12USN-8183-2

linux-image-aws-6.17Ubuntu

Fixed in:6.17.0-1012.12~24.04.1USN-8183-2

Fixed in:6.17.0-1012.12USN-8183-2

linux-image-aws-64kUbuntu

Fixed in:6.17.0-1012.12~24.04.1USN-8183-2

Fixed in:6.17.0-1012.12USN-8183-2

linux-image-aws-64k-6.17Ubuntu

Fixed in:6.17.0-1012.12~24.04.1USN-8183-2

Fixed in:6.17.0-1012.12USN-8183-2

linux-image-azureUbuntu

Fixed in:6.17.0-1013.13~24.04.1USN-8245-1

Fixed in:6.17.0-1013.13USN-8245-1

linux-image-azure-6.17Ubuntu

Fixed in:6.17.0-1013.13~24.04.1USN-8245-1

Fixed in:6.17.0-1013.13USN-8245-1

linux-image-gcpUbuntu

Fixed in:6.17.0-1012.12~24.04.1USN-8183-1

Fixed in:6.17.0-1012.12USN-8183-1

linux-image-gcp-6.17Ubuntu

Fixed in:6.17.0-1012.12~24.04.1USN-8183-1

Fixed in:6.17.0-1012.12USN-8183-1

linux-image-gcp-64kUbuntu

Fixed in:6.17.0-1012.12~24.04.1USN-8183-1

Fixed in:6.17.0-1012.12USN-8183-1

linux-image-gcp-64k-6.17Ubuntu

Fixed in:6.17.0-1012.12~24.04.1USN-8183-1

Fixed in:6.17.0-1012.12USN-8183-1

linux-image-genericUbuntu

Fixed in:6.17.0-22.22USN-8177-1

linux-image-generic-6.17Ubuntu

Fixed in:6.17.0-22.22~24.04.1USN-8183-2

Fixed in:6.17.0-22.22USN-8177-1

linux-image-generic-64kUbuntu

Fixed in:6.17.0-22.22USN-8177-1

linux-image-generic-64k-6.17Ubuntu

Fixed in:6.17.0-22.22~24.04.1USN-8183-2

Fixed in:6.17.0-22.22USN-8177-1

linux-image-generic-64k-hwe-24.04Ubuntu

Fixed in:6.17.0-22.22~24.04.1USN-8183-2

linux-image-generic-hwe-24.04Ubuntu

Fixed in:6.17.0-22.22~24.04.1USN-8183-2

linux-image-oem-24.04Ubuntu

Fixed in:6.17.0-1020.20USN-8245-1

linux-image-oem-24.04aUbuntu

Fixed in:6.17.0-1020.20USN-8245-1

linux-image-oem-24.04bUbuntu

Fixed in:6.17.0-1020.20USN-8245-1

linux-image-oem-24.04cUbuntu

Fixed in:6.17.0-1020.20USN-8245-1

linux-image-oem-24.04dUbuntu

Fixed in:6.17.0-1020.20USN-8245-1

linux-image-oem-6.17Ubuntu

Fixed in:6.17.0-1020.20USN-8245-1

linux-image-oracleUbuntu

Fixed in:6.17.0-1011.11~24.04.1USN-8183-2

Fixed in:6.17.0-1011.11USN-8183-2

linux-image-oracle-6.17Ubuntu

Fixed in:6.17.0-1011.11~24.04.1USN-8183-2

Fixed in:6.17.0-1011.11USN-8183-2

linux-image-oracle-64kUbuntu

Fixed in:6.17.0-1011.11~24.04.1USN-8183-2

Fixed in:6.17.0-1011.11USN-8183-2

linux-image-oracle-64k-6.17Ubuntu

Fixed in:6.17.0-1011.11~24.04.1USN-8183-2

Fixed in:6.17.0-1011.11USN-8183-2

linux-image-raspiUbuntu

Fixed in:6.17.0-1014.14USN-8257-1

linux-image-raspi-6.17Ubuntu

Fixed in:6.17.0-1014.14USN-8257-1

linux-image-realtimeUbuntu

Fixed in:6.17.0-1010.11USN-8177-1

linux-image-realtime-6.17Ubuntu

Fixed in:6.17.0-1010.11~24.04.1USN-8177-2

Fixed in:6.17.0-1010.11USN-8177-1

linux-image-realtime-hwe-24.04Ubuntu

Fixed in:6.17.0-1010.11~24.04.1USN-8177-2

linux-image-virtualUbuntu

Fixed in:6.17.0-22.22USN-8177-1

linux-image-virtual-6.17Ubuntu

Fixed in:6.17.0-22.22~24.04.1USN-8183-2

Fixed in:6.17.0-22.22USN-8177-1

linux-image-virtual-hwe-24.04Ubuntu

Fixed in:6.17.0-22.22~24.04.1USN-8183-2

linux-oem-6.17Ubuntu

Fixed in:6.17.0-1020.20USN-8245-1

linux-oracleUbuntu

Fixed in:6.17.0-1011.11USN-8183-2

linux-oracle-6.17Ubuntu

Fixed in:6.17.0-1011.11~24.04.1USN-8183-2

linux-raspiUbuntu

Fixed in:6.17.0-1014.14USN-8257-1

linux-realtimeUbuntu

Fixed in:6.17.0-1010.11USN-8177-1

linux-realtime-6.17Ubuntu

Fixed in:6.17.0-1010.11~24.04.1USN-8177-2

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3.1 Vector

No CVSS vector data available.

Exploit Intelligence

0.14%probability of exploitation in 30 days

4thpercentile

Low risk: more likely to be exploited than 4% of all known CVEs.

References

Other references2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-12-29.