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CVE-2024-26870 is an input-size validation flaw in the Linux kernel NFSv4.2 extended-attribute listing path. nfs4_listxattr() failed to return ERANGE when invoked with a nonzero buffer whose size was smaller than the returned extended-attribute list size. If generic_listxattr() returns system.nfs4_acl, a listxattr() call using a buffer size of 16 can reach nfs4_listxattr_nfs4_user() with no remaining buffer space and trigger a kernel BUG in mm/usercopy.c.
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A Linux kernel NFSv4.2 listxattr handling flaw that can cause a kernel BUG/crash (denial of service) due to improper handling of a returned attribute-list size exceeding the supplied buffer. The affected Google COS kernel packages should be updated to version 18244.85.5 or later.
Linux kernel NFSv4.2 flaw that can trigger a kernel BUG in nfs4_listxattr.
A Linux kernel NFSv4.2 flaw that can trigger a kernel BUG in nfs4_listxattr at mm/usercopy.c:102.
Linux kernel NFSv4.2 flaw that can trigger a kernel BUG in mm/usercopy.c during nfs4_listxattr processing.
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Cross-references every affected SKU, including bundled OEM variants.
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