Update Rust crate lru to 0.18.0 [SECURITY]

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
lru	dependencies	minor	0.16.0 → 0.18.0

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Potential use-after-free due to lack of panic safety in LruCache::pop()

RUSTSEC-2026-0253

More information

Details

LruCache::pop() in lru was not panic-safe. If the Drop implementation of a stored key panics during pop(), self.detach() is never called, leaving dangling pointers in the internal doubly-linked list.

A subsequent cache operation that triggers eviction can then dereference these dangling pointers:

• The node is freed from the map, but remains linked in the LRU list due to the skipped detach() call
• When a new insertion causes eviction, the LRU traversal encounters the dangling pointer
• This results in a write to already-freed memory during the eviction process

Impact

• CWE-416 (Use-After-Free): memory corruption when subsequent cache operations access freed node pointers in the linked list
• CWE-415 (Double Free): potential heap corruption when the same memory is freed multiple times

Both types of undefined behavior can be invoked in safe Rust, but only if unwinding panics are enabled and std::panic::catch_unwind is used with key types that have potentially-panicking Drop implementations.

Fix

Fixed in lru 0.18.2 by detaching the node from the linked list before freeing it and dropping the key (lru-rs#238).

Severity

Unknown

References

• https://crates.io/crates/lru
• https://rustsec.org/advisories/RUSTSEC-2026-0253.html
• https://github.com/jeromefroe/lru-rs/pull/238

This data is provided by OSV and the Rust Advisory Database (CC0 1.0).

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Release Notes

jeromefroe/lru-rs (lru)

v0.18.2

Compare Source

• Fix panic-safety unsoundness in pop method.

v0.18.1

Compare Source

• Add find_and_promote method.

v0.18.0

Compare Source

• Fix unconstrained lifetime in get_or_insert_mut_ref.

v0.17.0

Compare Source

• Upgrade hashbrown to 0.17.0 and update MSRV to 1.85.0.

v0.16.4

Compare Source

• Add get_or_insert_with_key and variants.

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[palfrey]

This doesn't replace it entirely, and is blocked on awslabs/aws-sdk-rust#1451