slip: remove slip_hangup() to fix use-after-free in slip_receive_buf()
In the Linux kernel, the following vulnerability has been resolved: slip: remove slip_hangup() to fix use-after-free in slip_receive_buf() Jaeyoung Chung and Eulgyu Kim reported a slab-use-after-free read in slip_receive_buf() when racing against tty hangup. tty_ldisc_hangup() calls ld->ops->hangup() while holding only a read lock on tty->ldisc_sem (via tty_ldisc_ref()). Because slip_hangup() simply called slip_close(), it ran concurrently with reader functions such as slip_receive_buf(). slip_close() unregisters and frees the net device and its private struct slip, causing concurrent reader threads in slip_receive_buf() to dereference freed memory. Line discipline close() is already guaranteed to be called under the write lock of tty->ldisc_sem during hangup processing (in tty_ldisc_reinit() or tty_ldisc_kill()). Remove slip_hangup() so teardown is serialized cleanly by slip_close().
CVE-2026-90057
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-2026-90057
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": "5342b77c4123ba39f911d92a813295fb3bb21f69",
"lessThan": "9a3b1edff1ecb47d323f2506b3ffc22178acd1c6",
"versionType": "git"
},
{
"status": "affected",
"version": "5342b77c4123ba39f911d92a813295fb3bb21f69",
"lessThan": "a2dbac3fb03b4427ccf057debc83fc61ee102529",
"versionType": "git"
},
{
"status": "affected",
"version": "5342b77c4123ba39f911d92a813295fb3bb21f69",
"lessThan": "de1f978c0f6ab42b28192d74dc59af52fdc76135",
"versionType": "git"
},
{
"status": "affected",
"version": "5342b77c4123ba39f911d92a813295fb3bb21f69",
"lessThan": "ddbc5dc5a2e29b3934da09c1ba3c930fd8a40fd6",
"versionType": "git"
},
{
"status": "affected",
"version": "5342b77c4123ba39f911d92a813295fb3bb21f69",
"lessThan": "a540a49fcca59d1c92c3a6462e67ca21676a88df",
"versionType": "git"
},
{
"status": "affected",
"version": "5342b77c4123ba39f911d92a813295fb3bb21f69",
"lessThan": "23c53269f2baaedf2d92784290cb9ef6db2a3bce",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/slip/slip.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.32"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.32",
"versionType": "semver"
},
{
"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": [
"drivers/net/slip/slip.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90057
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #36476 · Revision 1
- Added to Heist Feed
- Publisher date