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CVE-2022-49990— s390: fix double free of GS and RI CBs on fork() failure

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于fork失败时双重释放GS和RI CBs，可能导致内存损坏。

CVSS 7.8 · High EPSS 0.27% · P18

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 8d9047f8b967ce6181fd824ae922978e1b055cc0< 25a95303b9e513cd2978aacc385d06e6fec23d07 affected
8d9047f8b967ce6181fd824ae922978e1b055cc0< cacd522e6652fbc2dc0cc6ae11c4e30782fef14b affected
8d9047f8b967ce6181fd824ae922978e1b055cc0< 297ae7e87a87a001dd3dfeac1cb26a42fd929708 affected
8d9047f8b967ce6181fd824ae922978e1b055cc0< 8195e065abf3df84eb0ad2987e76a40f21d1791c affected
8d9047f8b967ce6181fd824ae922978e1b055cc0< fbdc482d43eda40a70de4b0155843d5472f6de62 affected
8d9047f8b967ce6181fd824ae922978e1b055cc0< 13cccafe0edcd03bf1c841de8ab8a1c8e34f77d9 affected
9e51ee1b76efc7b5e9404010793a39fde0e03cb7 affected
232b47b3c88af1da737cd7760f247c4ed58168cf affected
… +12 more rows
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I. Basic Information for CVE-2022-49990

Vulnerability Information
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Vulnerability Title
s390: fix double free of GS and RI CBs on fork() failure
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: s390: fix double free of GS and RI CBs on fork() failure The pointers for guarded storage and runtime instrumentation control blocks are stored in the thread_struct of the associated task. These pointers are initially copied on fork() via arch_dup_task_struct() and then cleared via copy_thread() before fork() returns. If fork() happens to fail after the initial task dup and before copy_thread(), the newly allocated task and associated thread_struct memory are freed via free_task() -> arch_release_task_struct(). This results in a double free of the guarded storage and runtime info structs because the fields in the failed task still refer to memory associated with the source task. This problem can manifest as a BUG_ON() in set_freepointer() (with CONFIG_SLAB_FREELIST_HARDENED enabled) or KASAN splat (if enabled) when running trinity syscall fuzz tests on s390x. To avoid this problem, clear the associated pointer fields in arch_dup_task_struct() immediately after the new task is copied. Note that the RI flag is still cleared in copy_thread() because it resides in thread stack memory and that is where stack info is copied.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于fork失败时双重释放GS和RI CBs，可能导致内存损坏。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 8d9047f8b967ce6181fd824ae922978e1b055cc0 ~ 25a95303b9e513cd2978aacc385d06e6fec23d07 -
Linux Linux 4.15 -

II. Public POCs for CVE-2022-49990

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III. Intelligence Information for CVE-2022-49990

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Same Patch Batch · Linux · 2025-06-18 · 362 CVEs total

CVE-2025-38075 9.8 CRITICAL scsi: target: iscsi: Fix timeout on deleted connection
CVE-2022-50098 8.8 HIGH scsi: qla2xxx: Fix crash due to stale SRB access around I/O timeouts
CVE-2022-49934 8.8 HIGH wifi: mac80211: Fix UAF in ieee80211_scan_rx()
CVE-2025-38052 8.8 HIGH net/tipc: fix slab-use-after-free Read in tipc_aead_encrypt_done
CVE-2022-50164 8.8 HIGH wifi: iwlwifi: mvm: fix double list_add at iwl_mvm_mac_wake_tx_queue
CVE-2025-38016 8.8 HIGH HID: bpf: abort dispatch if device destroyed
CVE-2022-49974 8.8 HIGH HID: nintendo: fix rumble worker null pointer deref
CVE-2025-38074 8.8 HIGH vhost-scsi: protect vq->log_used with vq->mutex
CVE-2022-49968 8.0 HIGH ieee802154/adf7242: defer destroy_workqueue call
CVE-2022-49939 7.8 HIGH binder: fix UAF of ref->proc caused by race condition
CVE-2022-49948 7.8 HIGH vt: Clear selection before changing the font
CVE-2022-49935 7.8 HIGH dma-buf/dma-resv: check if the new fence is really later
CVE-2025-38082 7.8 HIGH gpio: virtuser: fix potential out-of-bound write
CVE-2022-50182 7.8 HIGH media: imx-jpeg: Align upwards buffer size
CVE-2025-38080 7.8 HIGH drm/amd/display: Increase block_sequence array size
CVE-2025-38079 7.8 HIGH crypto: algif_hash - fix double free in hash_accept
CVE-2025-38078 7.8 HIGH ALSA: pcm: Fix race of buffer access at PCM OSS layer
CVE-2022-50099 7.8 HIGH video: fbdev: arkfb: Check the size of screen before memset_io()
CVE-2025-38062 7.8 HIGH genirq/msi: Store the IOMMU IOVA directly in msi_desc instead of iommu_cookie
CVE-2025-38060 7.8 HIGH bpf: copy_verifier_state() should copy 'loop_entry' field

Showing top 20 of 362 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

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Same vendor: Linux

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