Answer in brief
CVE-2026-90057 records a High severity (CVSS 7.8) vulnerability in slip: remove slip_hangup() to fix use-after-free in slip_receive_buf(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=5342b77c4123ba39f911d92a813295fb3bb21f69 <9a3b1edff1ecb47d323f2506b3ffc22178acd1c6 || >=5342b77c4123ba39f911d92a813295fb3bb21f69 <a2dbac3fb03b4427ccf057debc83fc61ee102529 || >=5342b77c4123ba39f911d92a813295fb3bb21f69 <de1f978c0f6ab42b28192d74dc59af52fdc76135 || >=5342b77c4123ba39f911d92a813295fb3bb21f69 <ddbc5dc5a2e29b3934da09c1ba3c930fd8a40fd6 || >=5342b77c4123ba39f911d92a813295fb3bb21f69 <a540a49fcca59d1c92c3a6462e67ca21676a88df || >=5342b77c4123ba39f911d92a813295fb3bb21f69 <23c53269f2baaedf2d92784290cb9ef6db2a3bce | 9a3b1edff1ecb47d323f2506b3ffc22178acd1c6, a2dbac3fb03b4427ccf057debc83fc61ee102529, de1f978c0f6ab42b28192d74dc59af52fdc76135, ddbc5dc5a2e29b3934da09c1ba3c930fd8a40fd6, a540a49fcca59d1c92c3a6462e67ca21676a88df, 23c53269f2baaedf2d92784290cb9ef6db2a3bce |
| Linux/Linuxgeneric | 2.6.32 | Not reported |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
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().
Quoted source text, attributed separately from HOL analysis.