mirror of
https://github.com/fkie-cad/nvd-json-data-feeds.git
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29 lines
2.0 KiB
JSON
29 lines
2.0 KiB
JSON
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{
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"id": "CVE-2024-57982",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"published": "2025-02-27T02:15:11.397",
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"lastModified": "2025-02-27T02:15:11.397",
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"vulnStatus": "Received",
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"cveTags": [],
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: state: fix out-of-bounds read during lookup\n\nlookup and resize can run in parallel.\n\nThe xfrm_state_hash_generation seqlock ensures a retry, but the hash\nfunctions can observe a hmask value that is too large for the new hlist\narray.\n\nrehash does:\n rcu_assign_pointer(net->xfrm.state_bydst, ndst) [..]\n net->xfrm.state_hmask = nhashmask;\n\nWhile state lookup does:\n h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);\n hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) {\n\nThis is only safe in case the update to state_bydst is larger than\nnet->xfrm.xfrm_state_hmask (or if the lookup function gets\nserialized via state spinlock again).\n\nFix this by prefetching state_hmask and the associated pointers.\nThe xfrm_state_hash_generation seqlock retry will ensure that the pointer\nand the hmask will be consistent.\n\nThe existing helpers, like xfrm_dst_hash(), are now unsafe for RCU side,\nadd lockdep assertions to document that they are only safe for insert\nside.\n\nxfrm_state_lookup_byaddr() uses the spinlock rather than RCU.\nAFAICS this is an oversight from back when state lookup was converted to\nRCU, this lock should be replaced with RCU in a future patch."
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}
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],
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"metrics": {},
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/a16871c7832ea6435abb6e0b58289ae7dcb7e4fc",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/dd4c2a174994238d55ab54da2545543d36f4e0d0",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/e952837f3ddb0ff726d5b582aa1aad9aa38d024d",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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}
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]
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}
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