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CVE-2026-53294— mailbox: mailbox-test: don't free the reused channel

AI Predicted 5.5 Difficulty: Moderate EPSS 0.13% · P3

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinux8ea4484d0c2bb4e2152261943fa1a3522654b1c7< fc0089f82c3e36060c2c79156bc2018bfb16b56baffected
8ea4484d0c2bb4e2152261943fa1a3522654b1c7< 5d4f3d0f64f1016cb78b400a70b67df91fac99b5affected
8ea4484d0c2bb4e2152261943fa1a3522654b1c7< c494a11da45ad7ec9b0ff216c3e3ace351193bb6affected
8ea4484d0c2bb4e2152261943fa1a3522654b1c7< 3afca89fae501dbd7421e1777b5b8f033b1d98d0affected
8ea4484d0c2bb4e2152261943fa1a3522654b1c7< 5c209299b0113e289e238fa5f2e8f00c59f76060affected
8ea4484d0c2bb4e2152261943fa1a3522654b1c7< 82f6dcea46cf5de65c4ba7283f7c7b34de4a324daffected
8ea4484d0c2bb4e2152261943fa1a3522654b1c7< 240c71a2aea36a1a4210f911a1c32ea88777e8e4affected
8ea4484d0c2bb4e2152261943fa1a3522654b1c7< 88ebadbf0deefdaccdab868b44ff70a0a257f473affected
… +10 more rows
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I. Basic Information for CVE-2026-53294

Vulnerability Information
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Vulnerability Title
mailbox: mailbox-test: don't free the reused channel
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mailbox: mailbox-test: don't free the reused channel The RX channel can be aliased to the TX channel if it has a different MMIO. This special case needs to be handled when freeing the channels otherwise a double-free occurs.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的操作系统Linux所使用的内核。 Linux kernel 4.4版本存在安全漏洞，该漏洞源于mailbox-test驱动中处理RX通道别名TX通道时释放重复通道，可能导致双重释放。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 ~ fc0089f82c3e36060c2c79156bc2018bfb16b56b -
LinuxLinux 4.4 -

II. Public POCs for CVE-2026-53294

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III. Intelligence Information for CVE-2026-53294

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Patches & Fixes for CVE-2026-53294 (8)

Same Patch Batch · Linux · 2026-06-26 · 47 CVEs total

CVE-2026-533099.8 CRITICALocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison
CVE-2026-533228.8 HIGHvfio/pci: Clean up DMABUFs before disabling function
CVE-2026-532818.8 HIGHiommu/vt-d: Avoid NULL pointer dereference or refcount corruption
CVE-2026-533007.8 HIGHnet: enetc: fix NTMP DMA use-after-free issue
CVE-2026-532907.8 HIGHdrm/xe/eustall: Fix drm_dev_put called before stream disable in close
CVE-2026-532847.5 HIGHbtrfs: only release the dirty pages io tree after successful writes
CVE-2026-53278arm_mpam: Check whether the config array is allocated before destroying it
CVE-2026-53289ice: fix NULL pointer dereference in ice_reset_all_vfs()
CVE-2026-53283iommu/amd: Bounds-check devid in __rlookup_amd_iommu()
CVE-2026-53280iommu: Fix NULL group->domain dereference in pci_dev_reset_iommu_done()
CVE-2026-53282x86/kexec: Push kjump return address even for non-kjump kexec
CVE-2026-53279drm/gma500/oaktrail_lvds: fix hang on init failure
CVE-2026-53292net: phonet: do not BUG_ON() in pn_socket_autobind() on failed bind
CVE-2026-53291ALSA: hda/conexant: Fix missing error check for jack detection
CVE-2026-53293drm/amdgpu: fix AMDGPU_INFO_READ_MMR_REG
CVE-2026-53295mailbox: add sanity check for channel array
CVE-2026-53296mailbox: mailbox-test: free channels on probe error
CVE-2026-53297net: mana: Guard mana_remove against double invocation
CVE-2026-53298net: airoha: Move ndesc initialization at end of airoha_qdma_init_rx_queue()
CVE-2026-53299net: airoha: Move ndesc initialization at end of airoha_qdma_init_tx()

Showing top 20 of 47 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-53294

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