CVE-2026-31450: In the Linux kernel, the following vulnerability has been resolved: ext4: publish jinode after initialization

Q: How do I fix CVE-2026-31450?

linux kernel: upgrade to 5.10.253, 5.15.203, 6.1.168, 6.6.134, 6.12.81, 6.18.21, 6.19.11. Exact commands for each OS are on this page.

Q: Is CVE-2026-31450 being exploited?

CVE-2026-31450 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-31450 affect?

CVE-2026-31450 affects linux kernel. Severity is high (CVSS 8.8). In the Linux kernel, the following vulnerability has been resolved: ext4: publish jinode after initialization ext4_inode_attach_jinode() publishes ei->jinode to concurrent users. It used to set ei->jinode before jbd2_journal_init_jbd_inod

This month

HIGH 8.8WATCHLISTUPGRADE

CVE-2026-31450 is a high-severity flaw (CVSS 8.8) affecting linux kernel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In the Linux kernel, the following vulnerability has been resolved: ext4: publish jinode after initialization ext4_inode_attach_jinode() publishes ei->jinode to concurrent users. It used to set ei->jinode before jbd2_journal_init_jbd_inode(), allowing a reader to observe a non-NULL jinode with i_vfs_inode still unset. The fast commit flush path can then pass this jinode to jbd2_wait_inode_data(), which dereferences i_vfs_inode->i_mapping and m

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-476, CWE-362
Published	2026-04-22
Last modified	2026-10-19

Publisher (CNA): kernel.org · Vendor: linux

Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-22 14:16 UTCPublished CVE record published
2026-10-19 19:17 UTCUpdated Record last modified

linux linux kernel UPGRADE

Affected: >= 3.11.1 and < 5.10.253 · >= 5.11 and < 5.15.203 · >= 5.16 and < 6.1.168 · >= 6.2 and < 6.6.134 · >= 6.7 and < 6.12.81 · >= 6.13 and < 6.18.21 · >= 6.19 and < 6.19.11 · 3.11

Fixed in: 5.10.253, 5.15.203, 6.1.168, 6.6.134, 6.12.81, 6.18.21, 6.19.11

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-31450?

linux kernel: upgrade to 5.10.253, 5.15.203, 6.1.168, 6.6.134, 6.12.81, 6.18.21, 6.19.11. Exact commands for each OS are on this page.

Is CVE-2026-31450 being exploited?

CVE-2026-31450 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-31450 affect?

CVE-2026-31450 affects linux kernel. Severity is high (CVSS 8.8). In the Linux kernel, the following vulnerability has been resolved: ext4: publish jinode after initialization ext4_inode_attach_jinode() publishes ei->jinode to concurrent users. It used to set ei->jinode before jbd2_journal_init_jbd_inod

How urgent is CVE-2026-31450?

Priority 45/100. High severity; On your watchlist

Software pages

Linux kernel vulnerabilities

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References

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