tracing: Save the event file instead of the compatible histogram
Severity and exploitation
KEV coverage does not rule out exploitation.
Assessment vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSeverity
high7.8CVSS 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
The Linux kernel has a vulnerability where the create_field_var_hist function saves a pointer to a compatible histogram, which can be freed while still in use, leading to a use-after-free error. The affected versions are Linux kernel versions starting from 4.17. The vulnerability requires access to the kernel's tracing system.
Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.Attack 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 a6165126b1a1b26342b55be6eb6ee23af8756aba
git versions
02205a6752f223779a1b0e9e8ffacbea6e717851 → before 173914501b97236d7ea7dc2af7f30feddd4e1436
git versions
02205a6752f223779a1b0e9e8ffacbea6e717851 → before ac815a379644b2ad5008a009a3516ada31b5dd82
git versions
02205a6752f223779a1b0e9e8ffacbea6e717851 → before 8b307d64a60548e4a74cb746f74d7ed4bd49965e
git versions
02205a6752f223779a1b0e9e8ffacbea6e717851 → before 7a111ba0d1b74c99bc8f096565dc71945f694254
git versions
02205a6752f223779a1b0e9e8ffacbea6e717851 → before 3609ada3c12cecfb0ae5ee82ef4f86c5f18a2dea
git versions
02205a6752f223779a1b0e9e8ffacbea6e717851 → before 9631dbccd3c649b567a5aafffea6b00634183997
git versions
02205a6752f223779a1b0e9e8ffacbea6e717851 → before 7cafc82e6153f05a221be678cd649d02e06ba909
git versions
02205a6752f223779a1b0e9e8ffacbea6e717851 → before d5c42664fc094899af9aae5300b27fe8fdb658ef
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: Save the event file instead of the compatible histogram
create_field_var_hist() creates a histogram on the matched event to supply a field variable, and records it on the target so it can be torn down later:
hist_data = find_compatible_hist(target_hist_data, file);
...
/* Save the compatible histogram information */
var_hist->hist_data = hist_data;
hist_data is not the histogram it creates. It is one that was already there, whose keys the new one copies. The saved pointer has a single user, unregister_field_var_hists(), which runs when the target is removed:
file = hist_data->field_var_hists[i]->hist_data->event_file;
find_compatible_hist() matches on keys alone, so it can pick one with no variables of its own. check_var_refs() then returns false and the user can remove it while the target still points at it:
BUG: KASAN: slab-use-after-free in event_hist_trigger_free+0x2b2/0x320 Read of size 8 at addr ffff8880093b90e0 by task init/1
Freed by task 1: kfree+0x154/0x420 event_hist_trigger_free+0x1d5/0x320 event_hist_trigger_parse+0x35f3/0x69e0 trigger_process_regex+0x1a6/0x250
Save the event file instead. It is all the dereference ever wanted, and it does not go away when the user removes a trigger.
References
9 sourcesInside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-99235View 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-2026-99235
Observed 2026-11-03T19:50:42.535Z · upstream updated 2026-11-03T19:13:03.627Z
Product or version evidence changed
before
[ { "vendor": "Linux", "name": "Linux", "platforms": [], "versions": [ { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "a6165126b1a1b26342b55be6eb6ee23af8756aba", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "173914501b97236d7ea7dc2af7f30feddd4e1436", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "ac815a379644b2ad5008a009a3516ada31b5dd82", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "8b307d64a60548e4a74cb746f74d7ed4bd49965e", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "7a111ba0d1b74c99bc8f096565dc71945f694254", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "3609ada3c12cecfb0ae5ee82ef4f86c5f18a2dea", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "9631dbccd3c649b567a5aafffea6b00634183997", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "7cafc82e6153f05a221be678cd649d02e06ba909", "versionType": "git" } ], "defaultStatus": "unaffected", "cpes": [], "source": "Linux", "url": "https://www.cve.org/CVERecord?id=CVE-2026-99235" }, { "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-2026-99235" } ]after
[ { "vendor": "Linux", "name": "Linux", "platforms": [], "versions": [ { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "a6165126b1a1b26342b55be6eb6ee23af8756aba", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "173914501b97236d7ea7dc2af7f30feddd4e1436", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "ac815a379644b2ad5008a009a3516ada31b5dd82", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "8b307d64a60548e4a74cb746f74d7ed4bd49965e", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "7a111ba0d1b74c99bc8f096565dc71945f694254", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "3609ada3c12cecfb0ae5ee82ef4f86c5f18a2dea", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "9631dbccd3c649b567a5aafffea6b00634183997", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "7cafc82e6153f05a221be678cd649d02e06ba909", "versionType": "git" }, { "version": "02205a6752f223779a1b0e9e8ffacbea6e717851", "status": "affected", "lessThan": "d5c42664fc094899af9aae5300b27fe8fdb658ef", "versionType": "git" } ], "defaultStatus": "unaffected", "cpes": [], "source": "Linux", "url": "https://www.cve.org/CVERecord?id=CVE-2026-99235" }, { "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-2026-99235" } ]References changed
before
[ "https://git.kernel.org/stable/c/a6165126b1a1b26342b55be6eb6ee23af8756aba", "https://git.kernel.org/stable/c/173914501b97236d7ea7dc2af7f30feddd4e1436", "https://git.kernel.org/stable/c/ac815a379644b2ad5008a009a3516ada31b5dd82", "https://git.kernel.org/stable/c/8b307d64a60548e4a74cb746f74d7ed4bd49965e", "https://git.kernel.org/stable/c/7a111ba0d1b74c99bc8f096565dc71945f694254", "https://git.kernel.org/stable/c/3609ada3c12cecfb0ae5ee82ef4f86c5f18a2dea", "https://git.kernel.org/stable/c/9631dbccd3c649b567a5aafffea6b00634183997", "https://git.kernel.org/stable/c/7cafc82e6153f05a221be678cd649d02e06ba909" ]
after
[ "https://git.kernel.org/stable/c/a6165126b1a1b26342b55be6eb6ee23af8756aba", "https://git.kernel.org/stable/c/173914501b97236d7ea7dc2af7f30feddd4e1436", "https://git.kernel.org/stable/c/ac815a379644b2ad5008a009a3516ada31b5dd82", "https://git.kernel.org/stable/c/8b307d64a60548e4a74cb746f74d7ed4bd49965e", "https://git.kernel.org/stable/c/7a111ba0d1b74c99bc8f096565dc71945f694254", "https://git.kernel.org/stable/c/3609ada3c12cecfb0ae5ee82ef4f86c5f18a2dea", "https://git.kernel.org/stable/c/9631dbccd3c649b567a5aafffea6b00634183997", "https://git.kernel.org/stable/c/7cafc82e6153f05a221be678cd649d02e06ba909", "https://git.kernel.org/stable/c/d5c42664fc094899af9aae5300b27fe8fdb658ef" ]
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.