CVE-2024-42241

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

mm/shmem: disable PMD-sized page cache if needed

For shmem files, it's possible that PMD-sized page cache can't be

supported by xarray. For example, 512MB page cache on ARM64 when the base

page size is 64KB can't be supported by xarray. It leads to errors as the

following messages indicate when this sort of xarray entry is split.

WARNING: CPU: 34 PID: 7578 at lib/xarray.c:1025 xas_split_alloc+0xf8/0x128

Modules linked in: binfmt_misc nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 \

nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject \

nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 \

ip_set rfkill nf_tables nfnetlink vfat fat virtio_balloon drm fuse xfs \

libcrc32c crct10dif_ce ghash_ce sha2_ce sha256_arm64 sha1_ce virtio_net \

net_failover virtio_console virtio_blk failover dimlib virtio_mmio

CPU: 34 PID: 7578 Comm: test Kdump: loaded Tainted: G W 6.10.0-rc5-gavin+ #9

Hardwa

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References