CVE-2019-3901: debian debian_linux Improper Locking
Vulnerability summary
CVE-2019-3901 is a medium (CVSS 5.6) Improper Locking vulnerability in debian debian_linux. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 25.8% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 5Timeline
- 22-04-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A race condition in perf_event_open() allows local attackers to leak sensitive data from setuid programs. As no relevant locks (in particular the cred_guard_mutex) are held during the ptrace_may_access() call, it is possible for the specified target task to perform an execve() syscall with setuid execution before perf_event_alloc() actually attaches to it, allowing an attacker to bypass the ptrace_may_access() check and the perf_event_exit_task(current) call that is performed in install_exec_creds() during privileged execve() calls. This issue affects kernel versions before 4.8.
CVSS metrics
7 scores · 4 sources · 3 versions- OSV · DebianEcosystem advisory · calculated4.7MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- NVDNIST4.7MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- OSV · UbuntuEcosystem advisory · calculated4.7MediumCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:NDiffers
- NVDNIST5.6MediumCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
EPSS trend
Probability
0.34%
Chance of exploitation in the next 30 days
Percentile
26%
Versus all other CVEs
30-day change
0.00 pp
From 0.34% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu17 products
- linuxAll versions (No fix recorded) | < 4.4.0-28.47
- linux-azure-6.11All versions (No fix recorded)
- linux-azure-fdeAll versions (No fix recorded)
- linux-azure-fde-5.15All versions (No fix recorded)
- linux-gcp-6.11All versions (No fix recorded)
Netapp8 products
- active_iq_unified_manager_for_vmware_vsphere≥ 9.5 (No fix recorded)
- cn1610_firmwarena
- hci_management_nodena
- snapprotectna
- solidfirena
Debian2 products
- linux< 4.6.1-1
- debian_linuxEOL8.0
Linux1 product
- linux_kernel< 4.8
The linux foundation1 product
- kernelolder then 4.8
5 vendors · 29 products
References
8 links
lists.debian.org/debian-lts-announce/2019/05/msg00041.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.debian.org/debian-lts-announce/2019/05/msg00042.htmlMailing ListX Refsource MLISTThird Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3901X Refsource CONFIRMIssue TrackingPatchThird Party Advisory