Medium severity5.5NVD Advisory· Published Jun 24, 2026· Updated Jul 8, 2026
CVE-2026-52930
CVE-2026-52930
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 products
16cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 8 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=3.1,<5.10.259
- cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:*
- (no CPE)
- osv-coords7 versionspkg:apk/chainguard/linux-azure-6.18pkg:apk/chainguard/linux-gcp-6.18pkg:apk/chainguard/linux-gcp-6.18-bootc-boot-installedpkg:apk/chainguard/linux-qemu-6.18pkg:apk/chainguard/linux-qemu-6.18-bootc-boot-installedpkg:apk/chainguard/linux-qemu-melangepkg:linux/kernel
< 6.18.38-r0+ 6 more
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: >= 3.1.0, < 5.10.259
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/030bbc857bd51d4b25a90d931d3f8775ef22823anvdPatch
- git.kernel.org/stable/c/1f0d01e35dbb228084d5187212e32c91a30dcbebnvdPatch
- git.kernel.org/stable/c/2e5c6f4fd4001562781e99bbfc7f1f0127187542nvdPatch
- git.kernel.org/stable/c/6560be3f6a5bb84f006f184f0c966747bb58e1a3nvdPatch
- git.kernel.org/stable/c/92cda2593cf2ed25b0e9d78e5e6d8303bba1a064nvdPatch
- git.kernel.org/stable/c/b1e9aef48e4d8a0c1b54fb913077b0824ed7d650nvdPatch
- git.kernel.org/stable/c/b5107b4ce3ad45fcf369ee2058c8910620f4b5a8nvdPatch
- git.kernel.org/stable/c/db752ebfdaf2c7f27cd9690ef48b616af068319cnvdPatch
News mentions
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