High [CVE-2026-53049] add some missing log locking
This high-severity Red Hat Linux advisory covers CVE-2026-53049 affecting Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 6.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Summary
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().
A flaw was found in the Linux kernel's Global File System 2 (GFS2) component. This omission allows concurrent transactions to access shared resources without proper exclusion, which could lead to race conditions.
Such conditions may result in system instability or data corruption, potentially causing a Denial of Service (DoS). Red Hat severity: Moderate — CVSS 7 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).
Weakness: CWE-414. Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7.
Will not fix / out of support: Red Hat Enterprise Linux 6. Red Hat fixing advisory: RHSA-2026:75746, RHSA-2026:75747, RHSA-2026:76739.
Affected products named by the advisory: Red Hat package: kernel-rt.
Is CVE-2026-53049 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-53049 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-53049?
Upgrade to a fixed release named by Red Hat:
- kernel-rt-0:4.18.0-553.171.1.rt7.512.el8_10
- kernel-0:4.18.0-553.171.1.el8_10
- kernel-0:5.14.0-687.55.1.el9_8
- RHSA-2026:75746
- RHSA-2026:75747
- RHSA-2026:76739
Confirm against the vendor advisory before you patch.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
- kernel-rt-0:4.18.0-553.171.1.rt7.512.el8_10
- kernel-0:4.18.0-553.171.1.el8_10
- kernel-0:5.14.0-687.55.1.el9_8
- RHSA-2026:75746
- RHSA-2026:75747
- RHSA-2026:76739
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
Mitigation
Upgrade to a fixed release: kernel-rt-0:4.18.0-553.171.1.rt7.512.el8_10, kernel-0:4.18.0-553.171.1.el8_10, kernel-0:5.14.0-687.55.1.el9_8, RHSA-2026:75746, RHSA-2026:75747, RHSA-2026:76739. That is the remediation for this advisory.
The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
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