{"timestamp":"2025-10-01T19:31:46.705139Z","id":"CVE-2024-57982","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/xfrm/xfrm_state.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"c2f672fc94642bae96821a393f342edcfa9794a6","lessThan":"b86dc510308d7a8955f3f47a4fea4bef887653e4","versionType":"git","status":"affected"},{"version":"c2f672fc94642bae96821a393f342edcfa9794a6","lessThan":"a16871c7832ea6435abb6e0b58289ae7dcb7e4fc","versionType":"git","status":"affected"},{"version":"c2f672fc94642bae96821a393f342edcfa9794a6","lessThan":"dd4c2a174994238d55ab54da2545543d36f4e0d0","versionType":"git","status":"affected"},{"version":"c2f672fc94642bae96821a393f342edcfa9794a6","lessThan":"e952837f3ddb0ff726d5b582aa1aad9aa38d024d","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/xfrm/xfrm_state.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"4.9","status":"affected"},{"version":"0","lessThan":"4.9","versionType":"semver","status":"unaffected"},{"version":"6.6.120","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.13","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.13.2","lessThanOrEqual":"6.13.*","versionType":"semver","status":"unaffected"},{"version":"6.14","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]

https://git.kernel.org/stable/c/b86dc510308d7a8955f3f47a4fea4bef887653e4

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CWE-125

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CWE-125

OR
          *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 from (excluding) 6.13.2
          *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.9 from (excluding) 6.12.13

kernel.org: https://git.kernel.org/stable/c/a16871c7832ea6435abb6e0b58289ae7dcb7e4fc Types: Mailing List, Patch

kernel.org: https://git.kernel.org/stable/c/dd4c2a174994238d55ab54da2545543d36f4e0d0 Types: Mailing List, Patch

kernel.org: https://git.kernel.org/stable/c/e952837f3ddb0ff726d5b582aa1aad9aa38d024d Types: Mailing List, Patch

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

xfrm: state: fix out-of-bounds read during lookup

lookup and resize can run in parallel.

The xfrm_state_hash_generation seqlock ensures a retry, but the hash
functions can observe a hmask value that is too large for the new hlist
array.

rehash does:
  rcu_assign_pointer(net->xfrm.state_bydst, ndst) [..]
  net->xfrm.state_hmask = nhashmask;

While state lookup does:
  h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
  hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) {

This is only safe in case the update to state_bydst is larger than
net->xfrm.xfrm_state_hmask (or if the lookup function gets
serialized via state spinlock again).

Fix this by prefetching state_hmask and the associated pointers.
The xfrm_state_hash_generation seqlock retry will ensure that the pointer
and the hmask will be consistent.

The existing helpers, like xfrm_dst_hash(), are now unsafe for RCU side,
add lockdep assertions to document that they are only safe for insert
side.

xfrm_state_lookup_byaddr() uses the spinlock rather than RCU.
AFAICS this is an oversight from back when state lookup was converted to
RCU, this lock should be replaced with RCU in a future patch.

https://git.kernel.org/stable/c/a16871c7832ea6435abb6e0b58289ae7dcb7e4fc

https://git.kernel.org/stable/c/dd4c2a174994238d55ab54da2545543d36f4e0d0

https://git.kernel.org/stable/c/e952837f3ddb0ff726d5b582aa1aad9aa38d024d