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CVE-2023-52448— gfs2: Fix kernel NULL pointer dereference in gfs2_rgrp_dump

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于gfs2_rgrp_dump中 NULL 指针取消引用。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.24% · P16

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 72244b6bc752b5c496f09de9a13c18adc314a53c< efc8ef87ab9185a23d5676f2f7d986022d91bcde affected
72244b6bc752b5c496f09de9a13c18adc314a53c< 5c28478af371a1c3fdb570ca67f110e1ae60fc37 affected
72244b6bc752b5c496f09de9a13c18adc314a53c< ee0586d73cbaf0e7058bc640d62a9daf2dfa9178 affected
72244b6bc752b5c496f09de9a13c18adc314a53c< d69d7804cf9e2ba171a27e5f98bc266f13d0414a affected
72244b6bc752b5c496f09de9a13c18adc314a53c< 067a7c48c2c70f05f9460d6f0e8423e234729f05 affected
72244b6bc752b5c496f09de9a13c18adc314a53c< c323efd620c741168c8e0cc6fc0be04ab57e331a affected
72244b6bc752b5c496f09de9a13c18adc314a53c< 8877243beafa7c6bfc42022cbfdf9e39b25bd4fa affected
4.20 affected
… +8 more rows
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I. Basic Information for CVE-2023-52448

Vulnerability Information
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Vulnerability Title
gfs2: Fix kernel NULL pointer dereference in gfs2_rgrp_dump
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于gfs2_rgrp_dump中 NULL 指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 72244b6bc752b5c496f09de9a13c18adc314a53c ~ efc8ef87ab9185a23d5676f2f7d986022d91bcde -
Linux Linux 4.20 -

II. Public POCs for CVE-2023-52448

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III. Intelligence Information for CVE-2023-52448

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Mailing List Discussions for CVE-2023-52448 (1)

Other References for CVE-2023-52448 (5)

Same Patch Batch · Linux · 2024-02-22 · 17 CVEs total

CVE-2024-26592 9.8 CRITICAL ksmbd: fix UAF issue in ksmbd_tcp_new_connection()
CVE-2023-52447 7.8 HIGH bpf: Defer the free of inner map when necessary
CVE-2023-52444 7.8 HIGH f2fs: fix to avoid dirent corruption
CVE-2024-26589 7.8 HIGH bpf: Reject variable offset alu on PTR_TO_FLOW_KEYS
CVE-2024-26586 7.8 HIGH mlxsw: spectrum_acl_tcam: Fix stack corruption
CVE-2024-26591 bpf: Fix re-attachment branch in bpf_tracing_prog_attach
CVE-2023-52452 bpf: Fix accesses to uninit stack slots
CVE-2023-52451 powerpc/pseries/memhp: Fix access beyond end of drmem array
CVE-2023-52450 perf/x86/intel/uncore: Fix NULL pointer dereference issue in upi_fill_topology()
CVE-2023-52449 mtd: Fix gluebi NULL pointer dereference caused by ftl notifier
CVE-2023-52446 bpf: Fix a race condition between btf_put() and map_free()
CVE-2023-52445 media: pvrusb2: fix use after free on context disconnection
CVE-2024-26590 erofs: fix inconsistent per-file compression format
CVE-2024-26588 LoongArch: BPF: Prevent out-of-bounds memory access
CVE-2024-26587 net: netdevsim: don't try to destroy PHC on VFs
CVE-2023-52443 apparmor: avoid crash when parsed profile name is empty

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52448

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