ALSA: seq: Serialize compat port-info ioctls
In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: Serialize compat port-info ioctls The native sequencer ioctl path serializes handler calls with client->ioctl_mutex, but the translated port-info compat path invokes the same handlers through snd_seq_kernel_client_ctl() without taking that mutex. This lets concurrent compat CREATE_PORT requests pass the port-count check before any request reaches the serialized insertion. The computed integer port index can then exceed the address field range and wrap to an existing index. Subsequent subscriber teardown can resolve the duplicate address to the wrong port and access a freed subscriber. Take ioctl_mutex while dispatching converted port-info requests, matching the native ioctl path. All translated port-info commands share this helper, so their accesses to the client port state are serialized as well.
CVE-2026-98742
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-2026-98742
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": "b3defb791b26ea0683a93a4f49c77ec45ec96f10",
"lessThan": "2db234e163f0d211b69a4eebbec8aacc5a54a80e",
"versionType": "git"
},
{
"status": "affected",
"version": "b3defb791b26ea0683a93a4f49c77ec45ec96f10",
"lessThan": "413211dd31cb2ef2fc99fb0aa1a037a97509502c",
"versionType": "git"
},
{
"status": "affected",
"version": "b3defb791b26ea0683a93a4f49c77ec45ec96f10",
"lessThan": "fc5c52848e405b6efb073db5035bb9ebaed11ec4",
"versionType": "git"
},
{
"status": "affected",
"version": "b3defb791b26ea0683a93a4f49c77ec45ec96f10",
"lessThan": "702d92f361f65d9698c473c7599d471395dc4341",
"versionType": "git"
},
{
"status": "affected",
"version": "b3defb791b26ea0683a93a4f49c77ec45ec96f10",
"lessThan": "95b2e0361c88753afa030c10698be0a1a5b67650",
"versionType": "git"
},
{
"status": "affected",
"version": "d6693160906d55ba376bf0b88b7c129762170162",
"versionType": "git"
},
{
"status": "affected",
"version": "02cbce8576a31df8fca54aaec91ee081076bd79d",
"versionType": "git"
},
{
"status": "affected",
"version": "6aab3aa52366a0051e5abf8aae4616c42053fd8e",
"versionType": "git"
},
{
"status": "affected",
"version": "f8a38ab4cd9624fc5ac8a7f965c7b20f5b62c03c",
"versionType": "git"
},
{
"status": "affected",
"version": "623e5c8ae32b39cc8baea83478695dc624935318",
"versionType": "git"
},
{
"status": "affected",
"version": "e4ff9f294629b65df3f7982cd4faf86b2856b9d7",
"versionType": "git"
},
{
"status": "affected",
"version": "c3162384aed4cfe3f1a1f40041f3ba8cd7704d88",
"versionType": "git"
},
{
"status": "affected",
"version": "3.2.99",
"lessThan": "3.3",
"versionType": "semver"
},
{
"status": "affected",
"version": "3.16.54",
"lessThan": "3.17",
"versionType": "semver"
},
{
"status": "affected",
"version": "3.18.94",
"lessThan": "3.19",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.1.50",
"lessThan": "4.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.4.115",
"lessThan": "4.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.9.78",
"lessThan": "4.10",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.14.15",
"lessThan": "4.15",
"versionType": "semver"
}
],
"programFiles": [
"sound/core/seq/seq_compat.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"sound/core/seq/seq_compat.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98742
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48940 · Revision 1
- Added to Heist Feed
- Publisher date