CVE-2026-53049 gfs2: add some missing log locking

What is CVE-2026-53049?

CVE-2026-53049 is a critical vulnerability in Linux kernel, published on 24 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

gfs2: add some missing log locking

Function gfs2_logd() calls the log flushing functions gfs2_ail1_start(), gfs2_ail1_wait(), and gfs2_ail1_empty() without holding sdp->sd_log_flush_lock, but these functions require exclusion against concurrent transactions.

To fix that, add a non-locking __gfs2_log_flush() function. Then, in gfs2_logd(), take sdp->sd_log_flush_lock before calling the above mentioned log flushing functions and __gfs2_log_flush().

Weakness: CWE-667, CWE-362

Which versions are affected by CVE-2026-53049?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-53049?

Apply the vendor's patch.

Is CVE-2026-53049 being exploited?

There is no known exploitation of CVE-2026-53049 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2026-53049, DEBIAN-CVE-2026-53049, GHSA-7q4j-gqp5-6p93, ROOT-OS-DEBIAN-11-CVE-2026-53049, ROOT-OS-DEBIAN-12-CVE-2026-53049, ROOT-OS-UBUNTU-2204-CVE-2026-53049 and 2 more.