net/smc: stop killed, freed and out_of_sync sharing a byte
In the Linux kernel, the following vulnerability has been resolved: net/smc: stop killed, freed and out_of_sync sharing a byte The three connection state flags are single-bit bitfields, so they occupy one byte of struct smc_connection and every store to one is a read-modify-write of the other two: u8 killed : 1; u8 freed : 1; u8 out_of_sync : 1; They are not written under a common lock. smc_cdc_msg_validate() sets out_of_sync from the receive tasklet, while smc_conn_kill() sets killed from process context under lock_sock(), and the receive path does not defer to the backlog when the socket is owned -- smc_cdc_msg_recv() takes only bh_lock_sock(). Give each flag its own byte so a store no longer touches its neighbours. All readers test them as booleans and are unchanged. struct smc_connection grows by two bytes.
CVE-2026-80980
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-2026-80980
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": "b286a0651e4404ab96cdfdcdad8a839a26b3751e",
"lessThan": "297e96f38d3e4f1a3b84068950dd5c7a55bbdc7b",
"versionType": "git"
},
{
"status": "affected",
"version": "b286a0651e4404ab96cdfdcdad8a839a26b3751e",
"lessThan": "09a9cbadc05f452405de31012bd2c428b601291a",
"versionType": "git"
},
{
"status": "affected",
"version": "b286a0651e4404ab96cdfdcdad8a839a26b3751e",
"lessThan": "313f79149eb337411c64e2c247234b62ef9a3cb9",
"versionType": "git"
},
{
"status": "affected",
"version": "b286a0651e4404ab96cdfdcdad8a839a26b3751e",
"lessThan": "2cb7a8d64b7e8ccdc69bbe48fe9c4eaa79c33aec",
"versionType": "git"
},
{
"status": "affected",
"version": "b286a0651e4404ab96cdfdcdad8a839a26b3751e",
"lessThan": "db51a8658c11a82432b64999519a269c3aabb447",
"versionType": "git"
}
],
"programFiles": [
"net/smc/smc.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"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": [
"net/smc/smc.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80980
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #46652 · Revision 1
- Added to Heist Feed
- Publisher date