CVE-2023-52448: gfs2: Fix kernel NULL pointer dereference in gfs2_rgrp_dump
Vulnerability summary
CVE-2023-52448 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15.7% 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 29 · Related 24Timeline
- 22-02-2024PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix kernel NULL pointer dereference in gfs2_rgrp_dump Syzkaller has reported a NULL pointer dereference when accessing rgd->rd_rgl in gfs2_rgrp_dump(). This can happen when creating rgd->rd_gl fails in read_rindex_entry(). Add a NULL pointer check in gfs2_rgrp_dump() to prevent that.
CVSS metrics
4 scores · 3 sources · 2 versions- 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
0.24%
Chance of exploitation in the next 30 days
Percentile
16%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.24% 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.
Ubuntu112 products
- linux< 5.4.0-176.196 | < 5.15.0-102.112
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.4.0-1122.132 | < 5.15.0-1057.63
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 72244b6bc752b5c496f09de9a13c18adc314a53c, < efc8ef87ab9185a23d5676f2f7d986022d91bcde | ≥ 72244b6bc752b5c496f09de9a13c18adc314a53c, < 5c28478af371a1c3fdb570ca67f110e1ae60fc37 | ≥ 72244b6bc752b5c496f09de9a13c18adc314a53c, < ee0586d73cbaf0e7058bc640d62a9daf2dfa9178 | ≥ 72244b6bc752b5c496f09de9a13c18adc314a53c, < d69d7804cf9e2ba171a27e5f98bc266f13d0414a | ≥ 72244b6bc752b5c496f09de9a13c18adc314a53c, < 067a7c48c2c70f05f9460d6f0e8423e234729f05 | ≥ 72244b6bc752b5c496f09de9a13c18adc314a53c, < c323efd620c741168c8e0cc6fc0be04ab57e331a | ≥ 72244b6bc752b5c496f09de9a13c18adc314a53c, < 8877243beafa7c6bfc42022cbfdf9e39b25bd4fa | 4.20
- linux_kernel≥ 4.20, < 5.4.268 | ≥ 5.5.0, < 5.10.209 | ≥ 5.11.0, < 5.15.148 | ≥ 5.16.0, < 6.1.75 | ≥ 6.2.0, < 6.6.14 | ≥ 6.7.0, < 6.7.2
Debian1 product
- linux< 6.1.76-1 | < 6.6.15-1
3 vendors · 115 products
