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Public proof of conceptFix available

CVE-2026-46333

A public proof of concept exists; no exploitation attested.

  • Published2026-05-15
  • Fixed in7.0.8 · 6.18.31 · 6.12.89 · 6.6.139 · 6.1.173 · 5.15.207
  • WeaknessCWE-269

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In the Linux kernel, the following vulnerability has been resolved: ptrace: slightly saner 'get_dumpable()' logic The 'dumpability' of a task is fundamentally about the memory image of the task - the concept comes from whether it can core dump or not - and makes no sense when you don't have an associated mm. And almost all users do in fact use it only for the case where the task has a mm pointer. But we have one odd special case: ptrace_may_access() uses 'dumpable' to check various other things entirely independently of the MM (typically explicitly using flags like PTRACE_MODE_READ_FSCREDS). Including for threads that no longer have a VM (and maybe never did, like most kernel threads). It's not what this flag was designed for, but it is what it is. The ptrace code does check that the uid/gid matches, so you do have to be uid-0 to see kernel thread details, but this means that the traditional "drop capabilities" model doesn't make any difference for this all. Make it all make a *bit* more sense by saying that if you don't have a MM pointer, we'll use a cached "last dumpability" flag if the thread ever had a MM (it will be zero for kernel threads since it is never set), and require a proper CAP_SYS_PTRACE capability to override.

Timeline

dates in UTC
  1. 2026-05-1514:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-46333?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-46333?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Linux linux kernel
BranchAffectedFixed in
7.0≥ 6.19, < 7.0.87.0.8
6.x≥ 6.13, < 6.18.316.18.31
6.x≥ 6.7, < 6.12.896.12.89
6.x≥ 6.2, < 6.6.1396.6.139
6.1≥ 5.16, < 6.1.1736.1.173
5.x≥ 5.11, < 5.15.2075.15.207
5.10≥ 4.9.1, < 5.10.2565.10.256
4.x≥ 4.8.16, < 4.94.9
4.x≥ 4.4.40, < 4.54.5
3.x≥ 3.16.52, < 3.173.17
7.1= 7.1no fix published
Debian debian linux
BranchAffectedFixed in
11.0= 11.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • kernelAlmaLinux:10all versions · fixed in 6.12.0-211.16.1.el10_2and 74 other packages
  • kernelAlmaLinux:9all versions · fixed in 5.14.0-611.54.6.el9_7and 116 other packages
  • kernelAlmaLinux:9all versions · fixed in 5.14.0-687.10.1.el9_8and 73 other packages
  • kernelAlmaLinux:8all versions · fixed in 4.18.0-553.124.4.el8_10and 29 other packages
  • kernelAlmaLinux:8all versions · fixed in 4.18.0-553.125.1.el8_10and 24 other packages
  • kernel-docAlmaLinux:10all versions · fixed in 6.12.0-124.56.5.el10_1and 1 other package
  • kernel-rtAlmaLinux:8all versions · fixed in 4.18.0-553.125.1.rt7.466.el8_10and 9 other packages

Vendor advisories

  • CVE-2026-46333 Red Hat Product Security2,860 products fixed · 1 known affected

    kernel: Read root-owned files as an unprivileged user

    openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4

  • ICSA-26-295-11 CISA5 known affected

    Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= V3.1.7 · SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= V3.1.7 · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= V3.1.7 · +2 more

  • SSA-457936 Siemens ProductCERT5 known affected

    SSA-457936: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.7

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= V3.1.7 · SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= V3.1.7 · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= V3.1.7 · +2 more

  • ICSA-26-209-04 CISA5 known affected

    Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= V3.1.6 · SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= V3.1.6 · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= V3.1.6 · +2 more

  • SSA-019113 Siemens ProductCERT5 known affected

    SSA-019113: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.6

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= V3.1.6 · SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= V3.1.6 · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= V3.1.6 · +2 more

  • RHSA-2026:33486 Red Hat Product Security47 products fixed

    Red Hat Security Advisory: kernel security, bug fix, and enhancement update

23 more advisories

Full record on NVD

Fix

  1. Update Linux linux kernel to 7.0.8 · 6.18.31 · 6.12.89 · 6.6.139 · 6.1.173 · 5.15.207 · 5.10.256 · 4.9
  2. Vendor fix Red Hat Product Security RHSA-2026:33486 · 47 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.
  3. Vendor fix CISA ICSA-26-174-06 · 1 productFor affected products, software updates should be installed upon availability. Product Patch version - APROL : APROL-AutoYaST-DVD- V4.4-010.10.260602 Until remediated software versions are available, customers are required to conduct a risk assessment of their affected s…
  4. Vendor fix Red Hat Product Security RHSA-2026:24814 · 35 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  5. Vendor fix Red Hat Product Security RHSA-2026:21702 · 4 productsFor OpenShift Container Platform 4.20 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
  6. Workaround from the vendor Red Hat Product Security RHSA-2026:33486 · 47 productsSee the security bulletin for a detailed mitigation procedure.
  7. Workaround from the vendor CISA ICSA-26-174-06 · 2 productsSecurity researchers have identified and validated the following workarounds to reduce exposure to the vulnerabilities described in this advisory. These measures do not remediate the underlying vulnerabilities but effectively block known attack vectors until patched software versions are deployed. …

Advisories and patches

Detection

read 2026-10-23 19:25 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
5 repositories, unverifiedKaraZajac/CHARONst4rburn/public-passwd0xBlackash/CVE-2026-46333studiogangster/CVE-2026-46333dr4mohamed/CVE-2026-46333
PoC-in-GitHub

Sources

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Published
2026-05-15
Last Modified
2026-10-15
NVD status
Modified
MSRC Title
ptrace: slightly saner 'get_dumpable()' logic

Frequently asked questions

What is CVE-2026-46333?

In the Linux kernel, the following vulnerability has been resolved: ptrace: slightly saner 'get_dumpable()' logic The 'dumpability' of a task is fundamentally about the memory image of the task - the concept comes from whether it can core dump or not - and makes no sense when you don't have an associated mm. And almost all users do in fact use it only for the case where the task has a mm pointer. But we have one odd special case: ptrace_may_access() uses 'dumpable' to check various other things entirely independently of the MM (typically explicitly using flags like PTRACE_MODE_READ_FSCREDS). Including for threads that no longer have a VM (and maybe never did, like most kernel threads). It's not what this flag was designed for, but it is what it is. The ptrace code does check that the uid/gid matches, so you do have to be uid-0 to see kernel thread details, but this means that the traditional "drop capabilities" model doesn't make any difference for this all. Make it all make a *bit* more sense by saying that if you don't have a MM pointer, we'll use a cached "last dumpability" flag if the thread ever had a MM (it will be zero for kernel threads since it is never set), and require a proper CAP_SYS_PTRACE capability to override.

Is CVE-2026-46333 actively exploited?

A proof-of-concept exploit exists for CVE-2026-46333, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-46333?

CVE-2026-46333 has a CVSS v3 base score of 7.1 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

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