7.8

CVE-2026-89503

ring-buffer: Fix subbuf resize race with ring_buffer_alloc_read_page()

In the Linux kernel, the following vulnerability has been resolved:

ring-buffer: Fix subbuf resize race with ring_buffer_alloc_read_page()

ring_buffer_alloc_read_page() is racy with ring_buffer_subbuf_order_set,
it can allocate a reader page with an outdated order. This isn't a big
issue, the user can still re-allocate a new reader page and try again.

However, what is more problematic is if the value of subbuf_order
changes in the middle of ring_buffer_alloc_read_page(). In that case,
bpage->order might not match the actual allocated memory.

Use bpage->order for the allocation to prevent this race.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version bce761d757452ba5eb77e11fecc37a04b67494e7
Version < 2313ff69bd237aad264a5913907f374f958335a2
Status affected
Version bce761d757452ba5eb77e11fecc37a04b67494e7
Version < 2dc510957fe8fd098ab3c3147ebdf34d00cd2734
Status affected
Version bce761d757452ba5eb77e11fecc37a04b67494e7
Version < 53106e9262a310ef2c9a9321168c03705940c678
Status affected
Version bce761d757452ba5eb77e11fecc37a04b67494e7
Version < e743527c5bfdceda1095bc0a9e596e2aebb6a9c3
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.8
Status affected
Version 0
Version < 6.8
Status unaffected
Version <= 6.12.*
Version 6.12.112
Status unaffected
Version <= 6.18.*
Version 6.18.50
Status unaffected
Version <= 7.2.*
Version 7.2.4
Status unaffected
Version <= *
Version 7.3-rc1
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.16% 0.057
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/2dc510957fe8fd098ab3c3147ebdf34d00cd2734
https://git.kernel.org/stable/c/53106e9262a310ef2c9a9321168c03705940c678
https://git.kernel.org/stable/c/e743527c5bfdceda1095bc0a9e596e2aebb6a9c3
https://git.kernel.org/stable/c/2313ff69bd237aad264a5913907f374f958335a2