Medium 5.5Published Jul 29, 2024

CVE-2024-42079gfs2: Fix NULL pointer dereference in gfs2_log_flush

Updated under an hour ago (Oct 27, 2026, 8:30 PM ET)

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It affects Linux and 4 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix NULL pointer dereference in gfs2_log_flush In gfs2_jindex_free(), set sdp->sd_jdesc to NULL under the log flush lock to provide exclusion against gfs2_log_flush(). In gfs2_log_flush(), check if sdp->sd_jdesc is non-NULL before dereferencing it. Otherwise, we could run into a NULL pointer dereference when outstanding glock work races with an unmount (glock_work_func -> run_queue -> do_xmote -> inode_go_sync -> gfs2_log_flush).

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 82218943058d5e3fe692a38b5a549479738dab33 before c3c5cfa3170c0940bc66a142859caac07d19b9d6; 82218943058d5e3fe692a38b5a549479738dab33 builds before 5f6a84cfb33b34610623857bd93919dcb661e29b; 82218943058d5e3fe692a38b5a549479738dab33 builds before 3429ef5f50909cee9e498c50f0c499b9397116ce; from 82218943058d5e3fe692a38b5a549479738dab33 before f54f9d5368a4e92ede7dd078a62788dae3a7c6ef; 82218943058d5e3fe692a38b5a549479738dab33 builds before 35264909e9d1973ab9aaa2a1b07cda70f12bb828	CNA record
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
linux linux_kernel linux:linux_kernel	before 6.6.37; from 6.7 before 6.9.8	NVD

References

References

https://git.kernel.org/stable/c/c3c5cfa3170c0940bc66a142859caac07d19b9d6	patch
https://git.kernel.org/stable/c/5f6a84cfb33b34610623857bd93919dcb661e29b	patch
https://git.kernel.org/stable/c/3429ef5f50909cee9e498c50f0c499b9397116ce	patch
https://git.kernel.org/stable/c/f54f9d5368a4e92ede7dd078a62788dae3a7c6ef	patch
https://git.kernel.org/stable/c/35264909e9d1973ab9aaa2a1b07cda70f12bb828	patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-457936.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.