CVE-2026-52930
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
36/100
Published: 2026-06-24
Modified: 2026-11-10
First seen: 2026-11-06
Status: active
Attack Surface
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
Description
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 Software (26)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d < b1e9aef48e4d8a0c1b54fb913077b0824ed7d650 |
| Linux | Linux | 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d < 92cda2593cf2ed25b0e9d78e5e6d8303bba1a064 |
| Linux | Linux | 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d < 1f0d01e35dbb228084d5187212e32c91a30dcbeb |
| Linux | Linux | 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d < 6560be3f6a5bb84f006f184f0c966747bb58e1a3 |
| Linux | Linux | 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d < b5107b4ce3ad45fcf369ee2058c8910620f4b5a8 |
| Linux | Linux | 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d < db752ebfdaf2c7f27cd9690ef48b616af068319c |
| Linux | Linux | 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d < 030bbc857bd51d4b25a90d931d3f8775ef22823a |
| Linux | Linux | 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d < 2e5c6f4fd4001562781e99bbfc7f1f0127187542 |
| Linux | Linux | 3.1 |
| Linux | Linux | 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d < b1e9aef48e4d8a0c1b54fb913077b0824ed7d650 |
| Linux | Linux | 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d < 92cda2593cf2ed25b0e9d78e5e6d8303bba1a064 |
| Linux | Linux | 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d < 1f0d01e35dbb228084d5187212e32c91a30dcbeb |
| Linux | Linux | 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d < 6560be3f6a5bb84f006f184f0c966747bb58e1a3 |
| Linux | Linux | 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d < b5107b4ce3ad45fcf369ee2058c8910620f4b5a8 |
| Linux | Linux | 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d < db752ebfdaf2c7f27cd9690ef48b616af068319c |
| Linux | Linux | 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d < 030bbc857bd51d4b25a90d931d3f8775ef22823a |
| Linux | Linux | 4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d < 2e5c6f4fd4001562781e99bbfc7f1f0127187542 |
| Linux | Linux | 3.1 |
| linux | linux_kernel | 3.1 – 5.10.259 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |