Описание
In the Linux kernel, the following vulnerability has been resolved:
selinux: reject a permission value exceeding the class permission count
perm_read() bounds a permission value by SEL_VEC_MAX but never by the nprim of the owning class or common, which is taken verbatim from the policy image. security_get_permissions() then writes perms[value - 1] into an nprim-sized kcalloc() array, so a class declaring fewer permissions than its largest permission value drives an out-of-bounds heap write. The top-level symbol tables are validated this way; the nested per-class permission table is not.
Reject a permission whose value exceeds nprim, which is already set when perm_read() runs. Well-formed policies are unaffected.
[PM: tweak comment for line length]
In the Linux kernel, the following vulnerability has been resolved:
selinux: reject a permission value exceeding the class permission count
perm_read() bounds a permission value by SEL_VEC_MAX but never by the nprim of the owning class or common, which is taken verbatim from the policy image. security_get_permissions() then writes perms[value - 1] into an nprim-sized kcalloc() array, so a class declaring fewer permissions than its largest permission value drives an out-of-bounds heap write. The top-level symbol tables are validated this way; the nested per-class permission table is not.
Reject a permission whose value exceeds nprim, which is already set when perm_read() runs. Well-formed policies are unaffected.
[PM: tweak comment for line length]
Ссылки
- https://nvd.nist.gov/vuln/detail/CVE-2026-80755
- https://git.kernel.org/stable/c/6c2ab7c4549f4f2305848df834e784651dbf1676
- https://git.kernel.org/stable/c/a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e
- https://git.kernel.org/stable/c/d14b5d0e97fccd27974fedc03b903408872907fd
- https://git.kernel.org/stable/c/dfc59a062c386d3d4415ecdab781065a645f33cc
EPSS
CVE ID
Связанные уязвимости
In the Linux kernel, the following vulnerability has been resolved: selinux: reject a permission value exceeding the class permission count perm_read() bounds a permission value by SEL_VEC_MAX but never by the nprim of the owning class or common, which is taken verbatim from the policy image. security_get_permissions() then writes perms[value - 1] into an nprim-sized kcalloc() array, so a class declaring fewer permissions than its largest permission value drives an out-of-bounds heap write. The top-level symbol tables are validated this way; the nested per-class permission table is not. Reject a permission whose value exceeds nprim, which is already set when perm_read() runs. Well-formed policies are unaffected. [PM: tweak comment for line length]
In the Linux kernel, the following vulnerability has been resolved: selinux: reject a permission value exceeding the class permission count perm_read() bounds a permission value by SEL_VEC_MAX but never by the nprim of the owning class or common, which is taken verbatim from the policy image. security_get_permissions() then writes perms[value - 1] into an nprim-sized kcalloc() array, so a class declaring fewer permissions than its largest permission value drives an out-of-bounds heap write. The top-level symbol tables are validated this way; the nested per-class permission table is not. Reject a permission whose value exceeds nprim, which is already set when perm_read() runs. Well-formed policies are unaffected. [PM: tweak comment for line length]
selinux: reject a permission value exceeding the class permission count
In the Linux kernel, the following vulnerability has been resolved: s ...
ELSA-2026-500374: Unbreakable Enterprise kernel security update (IMPORTANT)
EPSS