CVE-2023-5345: Use-after-free in Linux kernel's fs/smb/client component
Vulnerability summary
CVE-2023-5345 is a high (CVSS 7.8) Use After Free vulnerability in fedoraproject fedora. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 41.8% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 30 · Related 27Timeline
- 03-10-2023PublishedVulnerability first disclosed.
- 27-02-2025Last modifiedVulnerability information updated.
Description
A use-after-free vulnerability in the Linux kernel's fs/smb/client component can be exploited to achieve local privilege escalation. In case of an error in smb3_fs_context_parse_param, ctx->password was freed but the field was not set to NULL which could lead to double free. We recommend upgrading past commit e6e43b8aa7cd3c3af686caf0c2e11819a886d705.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.48%
Chance of exploitation in the next 30 days
Percentile
42%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.48% 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.
Ubuntu72 products
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
- linux-aws-5.13All versions (No fix recorded)
- linux-aws-5.19All versions (No fix recorded)
Linux2 products
- kernel≥ 0.0, < 6.6
- linux_kernel≥ 6.0.16, < 6.1.56 | ≥ 6.2, < 6.5.6 | 6.6:rc1 | 6.6:rc2 | 6.6:rc3
Debian1 product
- linux< 6.1.64-1 | < 6.5.6-1
Fedoraproject1 product
- fedoraEOL37 | 38 | 39
4 vendors · 76 products
References
22 links- lists.fedoraproject.org/archives/…Mailing List
- lists.fedoraproject.org/archives/…Mailing List
- lists.fedoraproject.org/archives/…Mailing List
- packetstormsecurity.com/files/177029/Kernel-Live-Patch-Security-Notice-LSN-0100-1.htmlThird Party AdvisoryVDB Entry
- kernel.danceREPORT
