net: ravb: serialize PTP clock teardown
In the Linux kernel, the following vulnerability has been resolved: net: ravb: serialize PTP clock teardown ravb_ptp_interrupt() can race with ravb_ptp_stop() and pass the clock to ptp_clock_event() while ptp_clock_unregister() is freeing it. This can lead to a use-after-free. Use READ_ONCE() and WRITE_ONCE() for lockless access to the clock pointer. Atomically detach it with xchg() before disabling PTP interrupts, then synchronize all IRQs which can invoke ravb_ptp_interrupt() before unregistering the detached clock. A handler which read the old pointer completes before the clock is unregistered, while later handlers read NULL and skip the event.
CVE-2026-80991
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-2026-80991
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": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c",
"lessThan": "b917f37bfcce919a969d66a044580a95b11df31c",
"versionType": "git"
},
{
"status": "affected",
"version": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c",
"lessThan": "695acb5534a9e366efb47b40c7487fc56488b09b",
"versionType": "git"
},
{
"status": "affected",
"version": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c",
"lessThan": "67a82e6f886beed0de8f8da08bb767e68fba952d",
"versionType": "git"
},
{
"status": "affected",
"version": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c",
"lessThan": "66b50c31419e7946e9aa325a468ad9b64c961a25",
"versionType": "git"
},
{
"status": "affected",
"version": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c",
"lessThan": "1cb9663789c5b7a12fcd419fcca6d6254c398252",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/ethernet/renesas/ravb.h",
"drivers/net/ethernet/renesas/ravb_main.c",
"drivers/net/ethernet/renesas/ravb_ptp.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.2"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.2",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/ethernet/renesas/ravb.h",
"drivers/net/ethernet/renesas/ravb_main.c",
"drivers/net/ethernet/renesas/ravb_ptp.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80991
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46654 · Revision 1
- Added to Heist Feed
- Publisher date