CVE-2024-42079: gfs2: Fix NULL pointer dereference in gfs2_log_flush
Vulnerability summary
CVE-2024-42079 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18.9% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 30 · Related 25Timeline
- 29-07-2024PublishedVulnerability first disclosed.
- 15-10-2026Last modifiedVulnerability information updated.
Description
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 metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.27%
Chance of exploitation in the next 30 days
Percentile
19%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.27% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu117 products
- linux< 5.15.0-127.137 | < 6.8.0-48.48
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.15.0-1073.79 | < 6.8.0-1018.20
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 82218943058d5e3fe692a38b5a549479738dab33, < c3c5cfa3170c0940bc66a142859caac07d19b9d6 | ≥ 82218943058d5e3fe692a38b5a549479738dab33, < 5f6a84cfb33b34610623857bd93919dcb661e29b | ≥ 82218943058d5e3fe692a38b5a549479738dab33, < 3429ef5f50909cee9e498c50f0c499b9397116ce | ≥ 82218943058d5e3fe692a38b5a549479738dab33, < f54f9d5368a4e92ede7dd078a62788dae3a7c6ef | ≥ 82218943058d5e3fe692a38b5a549479738dab33, < 35264909e9d1973ab9aaa2a1b07cda70f12bb828 | 5.12
- linux_kernel< 6.6.37 | ≥ 6.7, < 6.9.8
Debian1 product
- linux< 6.1.162-1 | < 6.9.8-1
3 vendors · 120 products
