Public vulnerability disclosure

CVE-2026-46333

ptrace: slightly saner 'get_dumpable()' logic

publishedCWE-269

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.

Technical severity7.1 highCVSS 3.1 · CNA: Linux
Published2026-05-15Source updated 2026-11-10
Collected2026-11-102 attributed sources

Fixes and workarounds

Fix

RHSA-2026:19540: NVIDIA for RHEL 10 RHSA-2026:33486: NVIDIA for RHEL 10 RHSA-2026:21701: Red Hat OpenShift Container Platform 4.20 RHSA-2026:21702: Red Hat OpenShift Container Platform 4.20 RHSA-2026:20299: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0), Red Hat Enterprise Linux Real Time EUS (v. 10.0), Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) RHSA-2026:19569: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Real Time (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10) RHSA-2026:19705: Red Hat Enterprise Linux AppStream E4S (v.9.0), Red Hat Enterprise Linux BaseOS E4S (v.9.0) RHSA-2026:20593: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux BaseOS E4S (v.9.2) RHSA-2026:20054: Red Hat CodeReady Linux Builder EUS (v.9.4), Red Hat Enterprise Linux AppStream EUS (v.9.4), Red Hat Enterprise Linux BaseOS EUS (v.9.4), Red Hat Enterprise Linux Real Time EUS (v.9.4), Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) RHSA-2026:20129: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux BaseOS EUS (v.9.6), Red Hat Enterprise Linux Real Time EUS (v.9.6), Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) RHSA-2026:19568: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux Real Time (v. 9), Red Hat Enterprise Linux Real Time for NFV (v. 9) RHSA-2026:19666: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) RHSA-2026:23470: Red Hat Enterprise Linux BaseOS (v. 8) RHSA-2026:20130: Red Hat Enterprise Linux BaseOS AUS (v.8.4), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) RHSA-2026:20051: Red Hat Enterprise Linux BaseOS AUS (v.8.6), Red Hat Enterprise Linux BaseOS E4S (v.8.6), Red Hat Enterprise Linux BaseOS TUS (v.8.6) RHSA-2026:19521: Red Hat Enterprise Linux BaseOS E4S (v.8.8), Red Hat Enterprise Linux BaseOS TUS (v.8.8) RHSA-2026:23471: Red Hat Enterprise Linux BaseOS E4S (v.8.8) RHSA-2026:23469: Red Hat Enterprise Linux BaseOS E4S (v.9.2) RHSA-2026:24814: Red Hat Enterprise Linux BaseOS E4S (v.9.4) RHSA-2026:23468: Red Hat Enterprise Linux BaseOS EUS (v.9.6) RHSA-2026:19664: Red Hat Enterprise Linux NFV (v. 8), Red Hat Enterprise Linux RT (v. 8) RHSA-2026:19711: Red Hat Enterprise Linux NFV E4S (v.9.0), Red Hat Enterprise Linux Real Time E4S (v.9.0) RHSA-2026:19875: Red Hat Enterprise Linux Real Time E4S (v.9.2), Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)

Source: ADP: redhat-SADP

Workaround

See the security bulletin for a detailed mitigation procedure.

Source: ADP: redhat-SADP

Affected products and versions

Affected products, source version ranges and reporting authorities
ProductVersionsAuthority
Linux
Linux
≥ bfedb589252c01fa505ac9f6f2a3d5d68d707ef4; < 93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6 (affected, git)
≥ bfedb589252c01fa505ac9f6f2a3d5d68d707ef4; < 15b828a46f305ae9f05a7c16914b3ce273474205 (affected, git)
≥ bfedb589252c01fa505ac9f6f2a3d5d68d707ef4; < 4709234fd1b95136ceb789f639b1e7ea5de1b181 (affected, git)
≥ bfedb589252c01fa505ac9f6f2a3d5d68d707ef4; < 8f907d345bae8f4b3f004c5abc56bf2dfb851ea7 (affected, git)
≥ bfedb589252c01fa505ac9f6f2a3d5d68d707ef4; < 6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3d (affected, git)
≥ bfedb589252c01fa505ac9f6f2a3d5d68d707ef4; < 2a93a4fac7b6051d3be7cd1b015fe7320cd0404d (affected, git)
≥ bfedb589252c01fa505ac9f6f2a3d5d68d707ef4; < 01363cb3fbd0238ffdeb09f53e9039c9edf8a730 (affected, git)
≥ bfedb589252c01fa505ac9f6f2a3d5d68d707ef4; < 31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a (affected, git)
d5b3e840dbf6dd2c0f30b5982b6f5ecd49e46b12 (affected, git)
03eed7afbc09e061f66b448daf7863174c3dc3f3 (affected, git)
e45692fa1aea06676449b63ef3c2b6e1e72b7578 (affected, git)
694a95fa6dae4991f16cda333d897ea063021fed (affected, git)
≥ 3.16.52; < 3.17 (affected, semver)
≥ 4.4.40; < 4.5 (affected, semver)
≥ 4.8.16; < 4.9 (affected, semver)
≥ 4.9.1; < 4.10 (affected, semver)
Other versions: unaffected
CNA: Linux
Linux
Linux
4.10 (affected)
≥ 0; < 4.10 (unaffected, semver)
≥ 5.10.256; ≤ 5.10.* (unaffected, semver)
≥ 5.15.207; ≤ 5.15.* (unaffected, semver)
≥ 6.1.173; ≤ 6.1.* (unaffected, semver)
≥ 6.6.139; ≤ 6.6.* (unaffected, semver)
≥ 6.12.89; ≤ 6.12.* (unaffected, semver)
≥ 6.18.31; ≤ 6.18.* (unaffected, semver)
≥ 7.0.8; ≤ 7.0.* (unaffected, semver)
≥ 7.1; ≤ * (unaffected, original_commit_for_fix)
Other versions: affected
CNA: Linux
NVIDIA for RHEL 10
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
≥ 0:6.12.0-211.8.el10nv; < * (unaffected, rpm)
≥ 0:6.12.0-231.12.el10nv; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 10
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
≥ 0:6.12.0-211.16.1.el10_2; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 10.0 Extended Update Support
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
≥ 0:6.12.0-55.75.1.el10_0; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 8
Red Hat
kernel-rt
https://access.redhat.com/downloads/content/package-browser/
≥ 0:4.18.0-553.125.1.rt7.466.el8_10; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 8
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
≥ 0:4.18.0-553.125.1.el8_10; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 8
Red Hat
kpatch-patch
https://access.redhat.com/downloads/content/package-browser/
Range not reported
Other versions: unaffected
ADP: redhat-SADP
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
≥ 0:4.18.0-305.192.1.el8_4; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
≥ 0:4.18.0-305.192.1.el8_4; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
≥ 0:4.18.0-372.193.1.el8_6; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 8.6 Telecommunications Update Service
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
≥ 0:4.18.0-372.193.1.el8_6; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
≥ 0:4.18.0-372.193.1.el8_6; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 8.8 Telecommunications Update Service
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
≥ 0:4.18.0-477.143.1.el8_8; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
≥ 0:4.18.0-477.143.1.el8_8; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
Red Hat
kpatch-patch
https://access.redhat.com/downloads/content/package-browser/
Range not reported
Other versions: unaffected
ADP: redhat-SADP
Red Hat Enterprise Linux 9
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
≥ 0:5.14.0-687.10.1.el9_8; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
≥ 0:5.14.0-70.180.1.el9_0; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
Red Hat
kernel-rt
https://access.redhat.com/downloads/content/package-browser/
≥ 0:5.14.0-70.180.1.rt21.252.el9_0; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
≥ 0:5.14.0-284.172.1.el9_2; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
Red Hat
kernel-rt
https://access.redhat.com/downloads/content/package-browser/
≥ 0:5.14.0-284.172.1.rt14.457.el9_2; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
Red Hat
kpatch-patch
https://access.redhat.com/downloads/content/package-browser/
Range not reported
Other versions: unaffected
ADP: redhat-SADP
Red Hat Enterprise Linux 9.4 Extended Update Support
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
≥ 0:5.14.0-427.126.1.el9_4; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
Red Hat
kpatch-patch
https://access.redhat.com/downloads/content/package-browser/
Range not reported
Other versions: unaffected
ADP: redhat-SADP
Red Hat Enterprise Linux 9.6 Extended Update Support
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
≥ 0:5.14.0-570.116.1.el9_6; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 9.6 Extended Update Support
Red Hat
kpatch-patch
https://access.redhat.com/downloads/content/package-browser/
Range not reported
Other versions: unaffected
ADP: redhat-SADP
Red Hat OpenShift Container Platform 4.20
Red Hat
cri-o
https://access.redhat.com/downloads/content/package-browser/
≥ 0:1.33.12-3.rhaos4.20.git64c6a00.el9; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat OpenShift Container Platform 4.20
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
≥ 0:5.14.0-570.117.1.el9_6; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat OpenShift Container Platform 4.20
Red Hat
openshift
https://access.redhat.com/downloads/content/package-browser/
≥ 0:4.20.0-202605141748.p2.g2a0461f.assembly.stream.el8; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat OpenShift Container Platform 4.20
Red Hat
openshift-clients
https://access.redhat.com/downloads/content/package-browser/
≥ 0:4.20.0-202605211651.p2.g02b0b2d.assembly.stream.el8; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat OpenShift Container Platform 4.20
Red Hat
rhcos
https://access.redhat.com/downloads/content/package-browser/
≥ 4.20.9.6.202605270908-0; < * (unaffected, rpm)
Other versions: affected
ADP: redhat-SADP
Red Hat Enterprise Linux 6
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
Range not reported
Other versions: unaffected
ADP: redhat-SADP
Red Hat Enterprise Linux 7
Red Hat
kernel
https://access.redhat.com/downloads/content/package-browser/
Range not reported
Other versions: unaffected
ADP: redhat-SADP
Red Hat Enterprise Linux 7
Red Hat
kernel-rt
https://access.redhat.com/downloads/content/package-browser/
Range not reported
Other versions: unaffected
ADP: redhat-SADP
Red Hat OpenShift Container Platform 4
Red Hat
openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/
Range not reported
Other versions: affected
ADP: redhat-SADP
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)
Siemens
≥ V3.1.6; < * (affected, custom)
Other versions: unknown
ADP: siemens-SADP
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)
Siemens
≥ V3.1.7; < * (affected, custom)
Other versions: unknown
ADP: siemens-SADP
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)
Siemens
≥ V3.1.6; < * (affected, custom)
Other versions: unknown
ADP: siemens-SADP
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)
Siemens
≥ V3.1.7; < * (affected, custom)
Other versions: unknown
ADP: siemens-SADP
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)
Siemens
≥ V3.1.6; < * (affected, custom)
Other versions: unknown
ADP: siemens-SADP
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)
Siemens
≥ V3.1.7; < * (affected, custom)
Other versions: unknown
ADP: siemens-SADP
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)
Siemens
≥ V3.1.6; < * (affected, custom)
Other versions: unknown
ADP: siemens-SADP
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)
Siemens
≥ V3.1.7; < * (affected, custom)
Other versions: unknown
ADP: siemens-SADP
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)
Siemens
≥ V3.1.6; < * (affected, custom)
Other versions: unknown
ADP: siemens-SADP
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)
Siemens
≥ V3.1.7; < * (affected, custom)
Other versions: unknown
ADP: siemens-SADP

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / scoreVectorAuthority
3.1 / 7.1
high
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:NCNA: Linux
3.1 / 7.8
high
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HADP: redhat-SADP

Exploit evidence

References

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