CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: nfsd: clear opcnt on compound arg release to prevent OOB read nfsd4_release_compoundargs() resets args->ops to the inline iops[8] array when the dynamically-allocated ops buffer is freed, but leaves args->opcnt at its original value (which can be up to 200 for NFSv4.1+ compounds). If rq_status_counter is stuck at an odd value (which can happen when nfsd_dispatch() hits an error path after setting it odd), the RPC status dumpit handler reads min(opcnt, 16) entries from args->ops[]. Since iops only has 8 elements and is the last field in struct nfsd4_compoundargs, reading indices 8-15 accesses adjacent slab memory and leaks it to userspace via netlink. Zero opcnt unconditionally in nfsd4_release_compoundargs() so stale compound metadata is never exposed through the status interface. [ cel: Remove the kvfree_rcu_mightsleep() sleep from the exposure window ]
Засегнати продукти
- Linux Linux: bd9d6a3efa9709e653aafbeb859289feccb8e70c преди 58bcdfb2b2e412088839ae740b1a95154dc0b8d0; bd9d6a3efa9709e653aafbeb859289feccb8e70c преди e879148867bd4c4cac42e063ffaffa187dddc6fe; bd9d6a3efa9709e653aafbeb859289feccb8e70c преди c1a4f7b1848f95302df598217e1c7a1410c2d0c5; bd9d6a3efa9709e653aafbeb859289feccb8e70c преди ae4c38555e81563b8dc5eae55ffd70f0ea97aa5a
- Linux Linux: 6.7; преди 6.7; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък
История
- 11 септември 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-89691
- https://nvd.nist.gov/vuln/detail/CVE-2026-89691
- https://git.kernel.org/stable/c/58bcdfb2b2e412088839ae740b1a95154dc0b8d0
- https://git.kernel.org/stable/c/e879148867bd4c4cac42e063ffaffa187dddc6fe
- https://git.kernel.org/stable/c/c1a4f7b1848f95302df598217e1c7a1410c2d0c5
- https://git.kernel.org/stable/c/ae4c38555e81563b8dc5eae55ffd70f0ea97aa5a