7.8

CVE-2026-93798

btrfs: fix reloc root cleanup in merge_reloc_roots()

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

btrfs: fix reloc root cleanup in merge_reloc_roots()

If the root we got has zero root refs in its root item, we are resetting
the root's ->reloc_root without using barriers like we do everywhere else.
Sashiko complained about this while reviewing another patch, and it's
correct (see the Link tag below).

Also, we should not clear BTRFS_ROOT_DEAD_RELOC_TREE from the root unless
the root points to the reloc root we have.

Fix this by using clear_reloc_root(), which issues the memory barrier
after setting the root's ->reloc_root to NULL and before clearing the bit
BTRFS_ROOT_DEAD_RELOC_TREE from the root.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 1dae7e0e58b484eaa43d530f211098fdeeb0f404
Version < 29531470b1bf1e8bd2df4941fe913106edbca615
Status affected
Version 1dae7e0e58b484eaa43d530f211098fdeeb0f404
Version < 415f8665a969d3c906e4fd7c90fcbb4b357886f6
Status affected
Version 1dae7e0e58b484eaa43d530f211098fdeeb0f404
Version < ee695a968aa73b1e67ccbf2133dc0e54381d32b2
Status affected
Version 1dae7e0e58b484eaa43d530f211098fdeeb0f404
Version < 0bc25f0a2d1b3e0a691431c4d7aef36afcd527c5
Status affected
Version 1dae7e0e58b484eaa43d530f211098fdeeb0f404
Version < ab48583aa9948205ff9a6470e23dbff74c565e24
Status affected
Version 1dae7e0e58b484eaa43d530f211098fdeeb0f404
Version < 63d6b1f04cd91c825329712aa526215ffa5d11ca
Status affected
Version 1dae7e0e58b484eaa43d530f211098fdeeb0f404
Version < b78fe9563e2d5ae47805f1e5dc722c91fd30e1f8
Status affected
Version ee08663380ffd5a45a1c87580fbc305e8413c235
Status affected
Version 33823378ff2b510fd7b566f25bb18438aeb9b23b
Status affected
Version 5.4.54
Version < 5.5
Status affected
Version 5.7.11
Version < 5.8
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 5.8
Status affected
Version 0
Version < 5.8
Status unaffected
Version <= 5.10.*
Version 5.10.271
Status unaffected
Version <= 5.15.*
Version 5.15.222
Status unaffected
Version <= 6.1.*
Version 6.1.189
Status unaffected
Version <= 6.6.*
Version 6.6.158
Status unaffected
Version <= 6.12.*
Version 6.12.111
Status unaffected
Version <= 6.18.*
Version 6.18.53
Status unaffected
Version <= *
Version 7.2
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 0.13% 0.02
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/ab48583aa9948205ff9a6470e23dbff74c565e24
https://git.kernel.org/stable/c/63d6b1f04cd91c825329712aa526215ffa5d11ca
https://git.kernel.org/stable/c/b78fe9563e2d5ae47805f1e5dc722c91fd30e1f8
https://git.kernel.org/stable/c/0bc25f0a2d1b3e0a691431c4d7aef36afcd527c5
https://git.kernel.org/stable/c/29531470b1bf1e8bd2df4941fe913106edbca615
https://git.kernel.org/stable/c/415f8665a969d3c906e4fd7c90fcbb4b357886f6
https://git.kernel.org/stable/c/ee695a968aa73b1e67ccbf2133dc0e54381d32b2