CVE-2026-68214 (GCVE-0-2026-68214)
Vulnerability from cvelistv5
Published
2026-08-10 12:00
Modified
2026-08-19 16:31
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
media: rtl2832: fix use-after-free in rtl2832_remove()
cancel_delayed_work_sync() is called before i2c_mux_del_adapters()
in rtl2832_remove(). While the cancel waits for any running instance
of i2c_gate_work to finish, it does not prevent the timer from being
rescheduled by a concurrent thread.
During probe, the r820t_attach() call attempts I2C transfers through
the mux adapter. These transfers go through i2c_mux_master_xfer(),
which calls rtl2832_deselect() after the transfer completes,
rescheduling i2c_gate_work via schedule_delayed_work(). If this
transfer is still in flight when rtl2832_remove() runs,
rtl2832_deselect() can reschedule i2c_gate_work after it has been
cancelled, causing a use-after-free when kfree(dev) is called.
Fix this by calling i2c_mux_del_adapters() before
cancel_delayed_work_sync(). Once the mux adapter is unregistered, no
new I2C transfers can go through it, so rtl2832_deselect() can no
longer reschedule i2c_gate_work. The subsequent
cancel_delayed_work_sync() is then guaranteed to be final.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: cddcc40b1b1553010acb89add84c64b5d123ec94 Version: cddcc40b1b1553010acb89add84c64b5d123ec94 Version: cddcc40b1b1553010acb89add84c64b5d123ec94 Version: cddcc40b1b1553010acb89add84c64b5d123ec94 Version: cddcc40b1b1553010acb89add84c64b5d123ec94 Version: cddcc40b1b1553010acb89add84c64b5d123ec94 Version: cddcc40b1b1553010acb89add84c64b5d123ec94 Version: cddcc40b1b1553010acb89add84c64b5d123ec94 |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/media/dvb-frontends/rtl2832.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "1e8a6bc19403661661fed5ae82f6eca6c9cdfad2",
"status": "affected",
"version": "cddcc40b1b1553010acb89add84c64b5d123ec94",
"versionType": "git"
},
{
"lessThan": "68a9c0290897c1436ddceb8cea604c93377a0299",
"status": "affected",
"version": "cddcc40b1b1553010acb89add84c64b5d123ec94",
"versionType": "git"
},
{
"lessThan": "13c06056699e66ff7109ba68658cc6ea4a23f516",
"status": "affected",
"version": "cddcc40b1b1553010acb89add84c64b5d123ec94",
"versionType": "git"
},
{
"lessThan": "9acd5bbbe1df8e487e49488692c224496d4c9e16",
"status": "affected",
"version": "cddcc40b1b1553010acb89add84c64b5d123ec94",
"versionType": "git"
},
{
"lessThan": "24bef237eef8dd1ebcffb129ba21891ddad0d309",
"status": "affected",
"version": "cddcc40b1b1553010acb89add84c64b5d123ec94",
"versionType": "git"
},
{
"lessThan": "2c71bda6edc630a1f8c3c45d8df5fc22d234e042",
"status": "affected",
"version": "cddcc40b1b1553010acb89add84c64b5d123ec94",
"versionType": "git"
},
{
"lessThan": "90d781711418881f8c836c2a859cc2886625d750",
"status": "affected",
"version": "cddcc40b1b1553010acb89add84c64b5d123ec94",
"versionType": "git"
},
{
"lessThan": "680daf40a82d483949f87f0d8f98639dc47e610c",
"status": "affected",
"version": "cddcc40b1b1553010acb89add84c64b5d123ec94",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/media/dvb-frontends/rtl2832.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.7"
},
{
"lessThan": "4.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.265",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.216",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.183",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.148",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.101",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.42",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.6",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "4.7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: rtl2832: fix use-after-free in rtl2832_remove()\n\ncancel_delayed_work_sync() is called before i2c_mux_del_adapters()\nin rtl2832_remove(). While the cancel waits for any running instance\nof i2c_gate_work to finish, it does not prevent the timer from being\nrescheduled by a concurrent thread.\n\nDuring probe, the r820t_attach() call attempts I2C transfers through\nthe mux adapter. These transfers go through i2c_mux_master_xfer(),\nwhich calls rtl2832_deselect() after the transfer completes,\nrescheduling i2c_gate_work via schedule_delayed_work(). If this\ntransfer is still in flight when rtl2832_remove() runs,\nrtl2832_deselect() can reschedule i2c_gate_work after it has been\ncancelled, causing a use-after-free when kfree(dev) is called.\n\nFix this by calling i2c_mux_del_adapters() before\ncancel_delayed_work_sync(). Once the mux adapter is unregistered, no\nnew I2C transfers can go through it, so rtl2832_deselect() can no\nlonger reschedule i2c_gate_work. The subsequent\ncancel_delayed_work_sync() is then guaranteed to be final."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:31:42.193Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/1e8a6bc19403661661fed5ae82f6eca6c9cdfad2"
},
{
"url": "https://git.kernel.org/stable/c/68a9c0290897c1436ddceb8cea604c93377a0299"
},
{
"url": "https://git.kernel.org/stable/c/13c06056699e66ff7109ba68658cc6ea4a23f516"
},
{
"url": "https://git.kernel.org/stable/c/9acd5bbbe1df8e487e49488692c224496d4c9e16"
},
{
"url": "https://git.kernel.org/stable/c/24bef237eef8dd1ebcffb129ba21891ddad0d309"
},
{
"url": "https://git.kernel.org/stable/c/2c71bda6edc630a1f8c3c45d8df5fc22d234e042"
},
{
"url": "https://git.kernel.org/stable/c/90d781711418881f8c836c2a859cc2886625d750"
},
{
"url": "https://git.kernel.org/stable/c/680daf40a82d483949f87f0d8f98639dc47e610c"
}
],
"title": "media: rtl2832: fix use-after-free in rtl2832_remove()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-68214",
"datePublished": "2026-08-10T12:00:33.539Z",
"dateReserved": "2026-07-30T09:28:09.375Z",
"dateUpdated": "2026-08-19T16:31:42.193Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…