CVE-2026-90057
CVE CVE-2026-90057EUVD EUVD-2026-81918Published 2026-09-17T16:05:41.000ZLast changed 2026-09-18T17:52:47.000ZCVSS 7.8
What the advisory describes
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().
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 7.2.6; 5342b77c4123ba39f911d92a813295fb3bb21f69 <a2dbac3fb03b4427ccf057debc83fc61ee102529; patch: 6.6.157; patch: 7.3-rc1; 2.6.32; 5342b77c4123ba39f911d92a813295fb3bb21f69 <a540a49fcca59d1c92c3a6462e67ca21676a88df; 5342b77c4123ba39f911d92a813295fb3bb21f69 <23c53269f2baaedf2d92784290cb9ef6db2a3bce; 5342b77c4123ba39f911d92a813295fb3bb21f69 <ddbc5dc5a2e29b3934da09c1ba3c930fd8a40fd6; patch: 6.12.110; patch: 6.1.188; patch: 6.18.52; patch: 0; 5342b77c4123ba39f911d92a813295fb3bb21f69 <9a3b1edff1ecb47d323f2506b3ffc22178acd1c6; 5342b77c4123ba39f911d92a813295fb3bb21f69 <de1f978c0f6ab42b28192d74dc59af52fdc76135
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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