Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ipc/shm: serialize orphan cleanup with shm_nattch updates shm_destroy_orphaned() walks the shm idr under shm_ids(ns).rwsem, but that does not serialize all fields tested by shm_may_destroy(). In particular, shm_nattch is updated while holding shm_perm.lock, and attach paths can do that without holding the rwsem. Do not decide that an orphaned segment is unused before taking the object lock. Move the shm_may_destroy() check under shm_perm.lock, matching the other destroy paths, and unlock the segment when it no longer qualifies for removal.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d before b1e9aef48e4d8a0c1b54fb913077b0824ed7d650; affected 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d before 92cda2593cf2ed25b0e9d78e5e6d8303bba1a064; affected 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d before 1f0d01e35dbb228084d5187212e32c91a30dcbeb; affected 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d before 6560be3f6a5bb84f006f184f0c966747bb58e1a3; affected 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d before b5107b4ce3ad45fcf369ee2058c8910620f4b5a8; affected 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d before db752ebfdaf2c7f27cd9690ef48b616af068319c; affected 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d before 030bbc857bd51d4b25a90d931d3f8775ef22823a; affected 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d before 2e5c6f4fd4001562781e99bbfc7f1f0127187542 |
| Linux / Linux | affected 3.1; unaffected 0 before 3.1; unaffected 5.10.259 through 5.10.*; unaffected 5.15.210 through 5.15.*; unaffected 6.1.176 through 6.1.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.94 through 6.12.*; unaffected 6.18.36 through 6.18.*; unaffected 7.0.13 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b1e9aef48e4d8a0c1b54fb913077b0824ed7d650
- https://git.kernel.org/stable/c/92cda2593cf2ed25b0e9d78e5e6d8303bba1a064
- https://git.kernel.org/stable/c/1f0d01e35dbb228084d5187212e32c91a30dcbeb
- https://git.kernel.org/stable/c/6560be3f6a5bb84f006f184f0c966747bb58e1a3
- https://git.kernel.org/stable/c/b5107b4ce3ad45fcf369ee2058c8910620f4b5a8
- https://git.kernel.org/stable/c/db752ebfdaf2c7f27cd9690ef48b616af068319c
- https://git.kernel.org/stable/c/030bbc857bd51d4b25a90d931d3f8775ef22823a
- https://git.kernel.org/stable/c/2e5c6f4fd4001562781e99bbfc7f1f0127187542
ADP enrichment
No English description supplied.