net/smc: free pending qentry in smc_llc_flow_stop() before memset
In the Linux kernel, the following vulnerability has been resolved: net/smc: free pending qentry in smc_llc_flow_stop() before memset smc_llc_flow_stop() resets a flow struct with a blind memset: spin_lock_bh(&lgr->llc_flow_lock); memset(flow, 0, sizeof(*flow)); flow->type = SMC_LLC_FLOW_NONE; spin_unlock_bh(&lgr->llc_flow_lock); If flow->qentry is non-NULL at this point the pointer is overwritten without the allocation being freed, leaking one kmalloc object. A late-arriving duplicate CONFIRM_LINK or ADD_LINK_CONT message can set flow->qentry after the legitimate message has been consumed by the waiter via smc_llc_flow_qentry_clr() (which NULLs the pointer but leaves flow->type non-zero) but before the flow completes and smc_llc_flow_stop() runs. In that window the duplicate is stashed into flow->qentry, and then lost when smc_llc_flow_stop() zeros the struct. Call smc_llc_flow_qentry_del() inside the lock before the memset. smc_llc_flow_qentry_del() already checks flow->qentry before freeing, so the normal case where no entry is pending is a no-op.
CVE-2026-90107
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-2026-90107
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": "555da9af827d95134656fa459c8f3ece04dd867a",
"lessThan": "8e3deb150a5237b672c4579e69a6deb02027dbed",
"versionType": "git"
},
{
"status": "affected",
"version": "555da9af827d95134656fa459c8f3ece04dd867a",
"lessThan": "11bc373ee6630709f0c2da2e7860c23d503c9e9d",
"versionType": "git"
},
{
"status": "affected",
"version": "555da9af827d95134656fa459c8f3ece04dd867a",
"lessThan": "032aec7d03c9102616b98fea74f8f7145e7f867c",
"versionType": "git"
},
{
"status": "affected",
"version": "555da9af827d95134656fa459c8f3ece04dd867a",
"lessThan": "957dba2b8b5aebfe09caa6a6b22b958079082eab",
"versionType": "git"
},
{
"status": "affected",
"version": "555da9af827d95134656fa459c8f3ece04dd867a",
"lessThan": "f03aa5d36ae3c4068a1c3885146be99aa7fd9307",
"versionType": "git"
},
{
"status": "affected",
"version": "555da9af827d95134656fa459c8f3ece04dd867a",
"lessThan": "0879ea157acc1ac6752f6fcb755d1f91a2359238",
"versionType": "git"
},
{
"status": "affected",
"version": "555da9af827d95134656fa459c8f3ece04dd867a",
"lessThan": "5ff429dd6725fa6c1e17a4ed0be8ab675f67a98b",
"versionType": "git"
},
{
"status": "affected",
"version": "555da9af827d95134656fa459c8f3ece04dd867a",
"lessThan": "5ee0ceddc7785c6dcf4a8107fef01f0414a354f4",
"versionType": "git"
}
],
"programFiles": [
"net/smc/smc_llc.c"
],
"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": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/smc/smc_llc.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90107
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36513 · Revision 1
- Added to Heist Feed
- Publisher date