CVE-2026-89839: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: f2fs: use the mount idmap for the owner check in f2fs_xattr_advise_set() f2fs_xattr_advise_set() calls inode_owner_or_capable() with &nop_mnt_idmap before allowing the "system.advise" xattr to be set, instead of the idmap that the VFS passes to the ->set() handler. f2fs supports idmapped mounts, so on such a mount this checks the caller's fsuid against the unmapped on-disk owner rather than the mapped owner: the actual owner can be wrongly denied with -EPERM and an unrelated caller wrongly allowed. Pass the handler's idmap instead.

Засегнати продукти

• Linux Linux: 01beba7957a26f9b7179127e8ad56bb5a0f56138 преди 4c0c610b480cfbc57528aa1acbd6be12ed2a6fb1; 01beba7957a26f9b7179127e8ad56bb5a0f56138 преди c3e2692c7a58e0bdb84bd658d827e89dcecea3ad; 01beba7957a26f9b7179127e8ad56bb5a0f56138 преди 3b681229e9f8fb1dd29bc65983bf3c87779e4ca3; 01beba7957a26f9b7179127e8ad56bb5a0f56138 преди ab31e3b774f5d06b4489cef6c297b48c47c9dcbd; 01beba7957a26f9b7179127e8ad56bb5a0f56138 преди a54ffce4637acb0db8e695188a6c7f99f14c3576
• Linux Linux: 6.3; преди 6.3; 6.6.157 до 6.6.*; 6.12.110 до 6.12.*; 6.18.51 до 6.18.*; 7.2.5 до 7.2.*; 7.3 до *

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-89839
• https://nvd.nist.gov/vuln/detail/CVE-2026-89839
• https://git.kernel.org/stable/c/4c0c610b480cfbc57528aa1acbd6be12ed2a6fb1
• https://git.kernel.org/stable/c/c3e2692c7a58e0bdb84bd658d827e89dcecea3ad
• https://git.kernel.org/stable/c/3b681229e9f8fb1dd29bc65983bf3c87779e4ca3
• https://git.kernel.org/stable/c/ab31e3b774f5d06b4489cef6c297b48c47c9dcbd
• https://git.kernel.org/stable/c/a54ffce4637acb0db8e695188a6c7f99f14c3576