ptrace: slightly saner 'get_dumpable()' logic
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.
CVE-2026-46333
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-46333
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4",
"lessThan": "93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6",
"versionType": "git"
},
{
"status": "affected",
"version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4",
"lessThan": "15b828a46f305ae9f05a7c16914b3ce273474205",
"versionType": "git"
},
{
"status": "affected",
"version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4",
"lessThan": "4709234fd1b95136ceb789f639b1e7ea5de1b181",
"versionType": "git"
},
{
"status": "affected",
"version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4",
"lessThan": "8f907d345bae8f4b3f004c5abc56bf2dfb851ea7",
"versionType": "git"
},
{
"status": "affected",
"version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4",
"lessThan": "6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3d",
"versionType": "git"
},
{
"status": "affected",
"version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4",
"lessThan": "2a93a4fac7b6051d3be7cd1b015fe7320cd0404d",
"versionType": "git"
},
{
"status": "affected",
"version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4",
"lessThan": "01363cb3fbd0238ffdeb09f53e9039c9edf8a730",
"versionType": "git"
},
{
"status": "affected",
"version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4",
"lessThan": "31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a",
"versionType": "git"
},
{
"status": "affected",
"version": "d5b3e840dbf6dd2c0f30b5982b6f5ecd49e46b12",
"versionType": "git"
},
{
"status": "affected",
"version": "03eed7afbc09e061f66b448daf7863174c3dc3f3",
"versionType": "git"
},
{
"status": "affected",
"version": "e45692fa1aea06676449b63ef3c2b6e1e72b7578",
"versionType": "git"
},
{
"status": "affected",
"version": "694a95fa6dae4991f16cda333d897ea063021fed",
"versionType": "git"
},
{
"status": "affected",
"version": "3.16.52",
"lessThan": "3.17",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.4.40",
"lessThan": "4.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.8.16",
"lessThan": "4.9",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.9.1",
"lessThan": "4.10",
"versionType": "semver"
}
],
"programFiles": [
"include/linux/sched.h",
"kernel/exit.c",
"kernel/ptrace.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.256",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.207",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.173",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.139",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.89",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.31",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.8",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"include/linux/sched.h",
"kernel/exit.c",
"kernel/ptrace.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46333
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #28421 · Revision 1
- Added to Heist Feed
- Publisher date