tracing: Unregister field variable histograms when the command fails
Severity and exploitation
KEV coverage does not rule out exploitation.
Severity
unknownCVSS measures technical severity, not the likelihood of an attack.
Known exploitation
Not listed in the checked CISA KEV catalog
Absence from CISA KEV does not rule out attacks.
Public exploit
Not established by this record
Missing evidence does not mean no public exploit exists.
Remediation
Fix status not established
No structured fix or guidance is available here. Check the latest publisher advisory.
What this means
In the Linux kernel, the following vulnerability has been resolved:
Source excerpt · LinuxAttack conditions
No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.
Review supporting sources →Affected versions
Check the exact model, release, and any platform requirements against your installation.
Linux · Linux
Linux
9 ranges
Linux · Linux
Linux
Compare with this publisher’s ranges. This does not inspect your installation.
affected
02205a6752f223779a1b0e9e8ffacbea6e717851 → before f21351d1c4cdcc6a68f03636a407c2af1a5e1e10
git versions
02205a6752f223779a1b0e9e8ffacbea6e717851 → before dba0f492703956801149cc70b39d2650a37995c3
git versions
02205a6752f223779a1b0e9e8ffacbea6e717851 → before a3d7ffd2409700748a495b645948fef48199206e
git versions
02205a6752f223779a1b0e9e8ffacbea6e717851 → before aae0ccd7326eef78dcdefffef3d1253e6f0615ca
git versions
02205a6752f223779a1b0e9e8ffacbea6e717851 → before 8482ec5b65f606d5bbcec518e0afc69ad65ca414
git versions
02205a6752f223779a1b0e9e8ffacbea6e717851 → before 431959fc76456cbba539279fe8967aa9391e6f23
git versions
02205a6752f223779a1b0e9e8ffacbea6e717851 → before 5afb9317e2eeb1c7021a82995ce244fda5a4bd4f
git versions
02205a6752f223779a1b0e9e8ffacbea6e717851 → before d0090baf02dd08f6e909f36f0ad54a4e80f5e79b
git versions
02205a6752f223779a1b0e9e8ffacbea6e717851 → before 91c14d6c13096091c56304120aaa26e479130b8b
git versions
Other versions: unaffected
Linux · Linux
Linux
11 ranges
Linux · Linux
Linux
Compare with this publisher’s ranges. This does not inspect your installation.
affected
4.17
unaffected
0 → before 4.17
semver versions
5.10.273 → through 5.10.*
semver versions
5.15.224 → through 5.15.*
semver versions
6.1.191 → through 6.1.*
semver versions
6.6.161 → through 6.6.*
semver versions
6.12.115 → through 6.12.*
semver versions
6.18.60 → through 6.18.*
semver versions
7.2.14 → through 7.2.*
semver versions
7.3.1 → through 7.3.*
semver versions
7.4-rc1 → through *
original_commit_for_fix versions
Other versions: affected
What to do
Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.
No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.
cve.new guidance unless attributed to a publisher. This page does not inspect your installation.
Public exploit evidence
No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.
Original source description
Read the full publisher description
In the Linux kernel, the following vulnerability has been resolved:
tracing: Unregister field variable histograms when the command fails
An action that names a field on another event needs that field as a variable, so create_field_var_hist() registers a second hist trigger on that event to provide it, and records it in target_hist_data->field_var_hists[].
If a later part of the same command fails, create_actions() returns an error and event_hist_trigger_parse() jumps to out_free. The write fails with -EINVAL and sched_switch gets no trigger, but:
echo 'hist:keys=pid:ts0=common_timestamp.usecs' >> \
events/sched/sched_waking/trigger
echo 'my_synth u64 lat; int a; int b' >> synthetic_events
echo 'hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts0:\
onmatch(sched.sched_waking).my_synth($wakeup_lat,prio,nosuchfld)'\
>> events/sched/sched_switch/trigger
cat events/sched/sched_waking/trigger
hist:keys=pid:vals=hitcount:ts0=common_timestamp.usecs:sort=hitcount:size=2048:clock=global [active] hist:keys=pid:vals=hitcount:synthetic_prio=prio:sort=hitcount:size=2048 [active]
The second histogram is the one created for 'prio'. It is still active and still counting.
out_free reaches destroy_field_var_hists(), which frees the field_var_hists[] entries, but never unregister_field_var_hists(), which is what removes the triggers and runs only from event_hist_trigger_free(). The entry is freed and the trigger is left with nothing tracking it.
Unregister the field variable histograms in out_free as well, and record each one as soon as its trigger is registered rather than after the lookup that follows it, so no exit can leave a registered trigger untracked. The entry then belongs to field_var_hists[] and is released by destroy_field_var_hists(), so freeing it on that exit would be a double free.
References
9 sourcesInside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-99234View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Environment requirements
These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.
Linux · platform conditions
Any condition may hold
Vulnerable product
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*From (inclusive): 4.17
Before: 5.10.273
Vulnerable product
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*From (inclusive): 4.17
Before: 5.15.224
Vulnerable product
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*From (inclusive): 4.17
Before: 6.1.191
Vulnerable product
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*From (inclusive): 4.17
Before: 6.6.161
Vulnerable product
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*From (inclusive): 4.17
Before: 6.12.115
Vulnerable product
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*From (inclusive): 4.17
Before: 6.18.60
Vulnerable product
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*From (inclusive): 4.17
Before: 7.2.14
Vulnerable product
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*From (inclusive): 4.17
Before: 7.3.1
Vulnerable product
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*From (inclusive): 4.17
Before: 7.4-rc1
Original applicability statements
[
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.17",
"versionEndExcluding": "5.10.273"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.17",
"versionEndExcluding": "5.15.224"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.17",
"versionEndExcluding": "6.1.191"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.17",
"versionEndExcluding": "6.6.161"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.17",
"versionEndExcluding": "6.12.115"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.17",
"versionEndExcluding": "6.18.60"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.17",
"versionEndExcluding": "7.2.14"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.17",
"versionEndExcluding": "7.3.1"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.17",
"versionEndExcluding": "7.4-rc1"
}
]
}
]
}
]Contributing organizations · 1
Assigning organization
Timeline
All times UTCAdvisory published
Publication date supplied by the source.
Source updated
Latest modification date supplied by the source.
Last imported by cve.new
Latest catalog import, not the date we first saw this advisory.
What changed
Follow changes- CVE · CVE-2026-99234
Observed 2026-11-03T19:50:40.784Z · upstream updated 2026-11-03T19:13:02.797Z
Product or version evidence changed
before
[ { "vendor": "Linux", "name": "Linux", "platforms": [], "versions": [ { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "f21351d1c4cdcc6a68f03636a407c2af1a5e1e10", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "dba0f492703956801149cc70b39d2650a37995c3", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "a3d7ffd2409700748a495b645948fef48199206e", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "aae0ccd7326eef78dcdefffef3d1253e6f0615ca", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "8482ec5b65f606d5bbcec518e0afc69ad65ca414", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "431959fc76456cbba539279fe8967aa9391e6f23", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "5afb9317e2eeb1c7021a82995ce244fda5a4bd4f", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "d0090baf02dd08f6e909f36f0ad54a4e80f5e79b", "versionType": "git" } ], "defaultStatus": "unaffected", "cpes": [], "source": "Linux", "url": "https://www.cve.org/CVERecord?id=CVE-2026-99234" }, { "vendor": "Linux", "name": "Linux", "platforms": [], "versions": [ { "version": "4.17", "status": "affected" }, { "version": "0", "status": "unaffected", "lessThan": "4.17", "versionType": "semver" }, { "version": "5.10.273", "status": "unaffected", "lessThanOrEqual": "5.10.*", "versionType": "semver" }, { "version": "5.15.224", "status": "unaffected", "lessThanOrEqual": "5.15.*", "versionType": "semver" }, { "version": "6.1.191", "status": "unaffected", "lessThanOrEqual": "6.1.*", "versionType": "semver" }, { "version": "6.6.161", "status": "unaffected", "lessThanOrEqual": "6.6.*", "versionType": "semver" }, { "version": "6.12.115", "status": "unaffected", "lessThanOrEqual": "6.12.*", "versionType": "semver" }, { "version": "6.18.60", "status": "unaffected", "lessThanOrEqual": "6.18.*", "versionType": "semver" }, { "version": "7.2.14", "status": "unaffected", "lessThanOrEqual": "7.2.*", "versionType": "semver" }, { "version": "7.3.1", "status": "unaffected", "lessThanOrEqual": "7.3.*", "versionType": "semver" } ], "defaultStatus": "affected", "cpes": [], "source": "Linux", "url": "https://www.cve.org/CVERecord?id=CVE-2026-99234" } ]after
[ { "vendor": "Linux", "name": "Linux", "platforms": [], "versions": [ { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "f21351d1c4cdcc6a68f03636a407c2af1a5e1e10", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "dba0f492703956801149cc70b39d2650a37995c3", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "a3d7ffd2409700748a495b645948fef48199206e", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "aae0ccd7326eef78dcdefffef3d1253e6f0615ca", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "8482ec5b65f606d5bbcec518e0afc69ad65ca414", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "431959fc76456cbba539279fe8967aa9391e6f23", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "5afb9317e2eeb1c7021a82995ce244fda5a4bd4f", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "d0090baf02dd08f6e909f36f0ad54a4e80f5e79b", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "91c14d6c13096091c56304120aaa26e479130b8b", "versionType": "git" } ], "defaultStatus": "unaffected", "cpes": [], "source": "Linux", "url": "https://www.cve.org/CVERecord?id=CVE-2026-99234" }, { "vendor": "Linux", "name": "Linux", "platforms": [], "versions": [ { "version": "4.17", "status": "affected" }, { "version": "0", "status": "unaffected", "lessThan": "4.17", "versionType": "semver" }, { "version": "5.10.273", "status": "unaffected", "lessThanOrEqual": "5.10.*", "versionType": "semver" }, { "version": "5.15.224", "status": "unaffected", "lessThanOrEqual": "5.15.*", "versionType": "semver" }, { "version": "6.1.191", "status": "unaffected", "lessThanOrEqual": "6.1.*", "versionType": "semver" }, { "version": "6.6.161", "status": "unaffected", "lessThanOrEqual": "6.6.*", "versionType": "semver" }, { "version": "6.12.115", "status": "unaffected", "lessThanOrEqual": "6.12.*", "versionType": "semver" }, { "version": "6.18.60", "status": "unaffected", "lessThanOrEqual": "6.18.*", "versionType": "semver" }, { "version": "7.2.14", "status": "unaffected", "lessThanOrEqual": "7.2.*", "versionType": "semver" }, { "version": "7.3.1", "status": "unaffected", "lessThanOrEqual": "7.3.*", "versionType": "semver" }, { "version": "7.4-rc1", "status": "unaffected", "lessThanOrEqual": "*", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected", "cpes": [], "source": "Linux", "url": "https://www.cve.org/CVERecord?id=CVE-2026-99234" } ]References changed
before
[ "https://git.kernel.org/stable/c/f21351d1c4cdcc6a68f03636a407c2af1a5e1e10", "https://git.kernel.org/stable/c/dba0f492703956801149cc70b39d2650a37995c3", "https://git.kernel.org/stable/c/a3d7ffd2409700748a495b645948fef48199206e", "https://git.kernel.org/stable/c/aae0ccd7326eef78dcdefffef3d1253e6f0615ca", "https://git.kernel.org/stable/c/8482ec5b65f606d5bbcec518e0afc69ad65ca414", "https://git.kernel.org/stable/c/431959fc76456cbba539279fe8967aa9391e6f23", "https://git.kernel.org/stable/c/5afb9317e2eeb1c7021a82995ce244fda5a4bd4f", "https://git.kernel.org/stable/c/d0090baf02dd08f6e909f36f0ad54a4e80f5e79b" ]
after
[ "https://git.kernel.org/stable/c/f21351d1c4cdcc6a68f03636a407c2af1a5e1e10", "https://git.kernel.org/stable/c/dba0f492703956801149cc70b39d2650a37995c3", "https://git.kernel.org/stable/c/a3d7ffd2409700748a495b645948fef48199206e", "https://git.kernel.org/stable/c/aae0ccd7326eef78dcdefffef3d1253e6f0615ca", "https://git.kernel.org/stable/c/8482ec5b65f606d5bbcec518e0afc69ad65ca414", "https://git.kernel.org/stable/c/431959fc76456cbba539279fe8967aa9391e6f23", "https://git.kernel.org/stable/c/5afb9317e2eeb1c7021a82995ce244fda5a4bd4f", "https://git.kernel.org/stable/c/d0090baf02dd08f6e909f36f0ad54a4e80f5e79b", "https://git.kernel.org/stable/c/91c14d6c13096091c56304120aaa26e479130b8b" ]
Environment requirements changed
before
[ { "source": "Linux", "statements": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.10.273" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.15.224" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.1.191" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.6.161" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.12.115" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.18.60" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "7.2.14" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "7.3.1" } ] } ] } ] } ]after
[ { "source": "Linux", "statements": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.10.273" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.15.224" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.1.191" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.6.161" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.12.115" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.18.60" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "7.2.14" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "7.3.1" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "7.4-rc1" } ] } ] } ] } ]
Large field values are marked as truncated previews. Original source snapshots remain retained.
Showing up to 50 most recent observed changes.