CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката може да се автоматизира
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: smb: client: validate dacloffset before building DACL pointers parse_sec_desc(), build_sec_desc(), and the chown path in id_mode_to_cifs_acl() all add the server-supplied dacloffset to pntsd before proving a DACL header fits inside the returned security descriptor. On 32-bit builds a malicious server can return dacloffset near U32_MAX, wrap the derived DACL pointer below end_of_acl, and then slip past the later pointer-based bounds checks. build_sec_desc() and id_mode_to_cifs_acl() can then dereference DACL fields from the wrapped pointer in the chmod/chown rewrite paths. Validate dacloffset numerically before building any DACL pointer and reuse the same helper at the three DACL entry points.
Засегнати продукти
- Linux Linux: bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 преди 5de2665e913a10ad70aaeecf736b97276e83d995; bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 преди f9dc3be8f403c1216df73e57221f44b045e7ee0b; bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 преди ba7f71b6161c0943dafc367565e5843d16b7d505; bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 преди 3b1ddba19e77ee35241cd27f16dc3e8d14e08db7; bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 преди c688f3ed73d31943334ad2139cb02ec49664322a; bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 преди 8bd07e417b6bda67e317920584e48cb6ee442a8a; bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 преди f98b48151cc502ada59d9778f0112d21f2586ca3
- Linux Linux: 5.12; преди 5.12; 5.15.210 до 5.15.*; 6.1.176 до 6.1.*; 6.6.140 до 6.6.*; 6.12.88 до 6.12.*; 6.18.30 до 6.18.*; 7.0.7 до 7.0.*; от 7.1 нататък
- Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: всички версии
Red Hat: още 5 продукта, добавени от Red Hat
Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7
Вид слабост
История
- 28 май 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-46195
- https://nvd.nist.gov/vuln/detail/CVE-2026-46195
- https://git.kernel.org/stable/c/5de2665e913a10ad70aaeecf736b97276e83d995
- https://git.kernel.org/stable/c/f9dc3be8f403c1216df73e57221f44b045e7ee0b
- https://git.kernel.org/stable/c/ba7f71b6161c0943dafc367565e5843d16b7d505
- https://git.kernel.org/stable/c/3b1ddba19e77ee35241cd27f16dc3e8d14e08db7
- https://git.kernel.org/stable/c/c688f3ed73d31943334ad2139cb02ec49664322a
- https://git.kernel.org/stable/c/8bd07e417b6bda67e317920584e48cb6ee442a8a
- https://git.kernel.org/stable/c/f98b48151cc502ada59d9778f0112d21f2586ca3
- https://access.redhat.com/security/cve/CVE-2026-46195
- https://bugzilla.redhat.com/show_bug.cgi?id=2482606
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46195.json
- https://access.redhat.com/errata/RHSA-2026:21556
- https://access.redhat.com/errata/RHSA-2026:21706
- https://access.redhat.com/errata/RHSA-2026:21745
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html