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CVE-2026-53158— misc: fastrpc: Fix NULL pointer dereference in rpmsg callback

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基金会开源的操作系统Linux所使用的内核。 Linux kernel 5.1版本存在安全漏洞，该漏洞源于fastrpc驱动中dev_set_drvdata在spin_lock_init和idr_init之前被调用，并且rpmsg通道在驱动绑定后立即激活，导致fastrpc_rpmsg_callback触发时cctx为空指针，可能造成空指针取消引用。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.12% · P2

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux f6f9279f2bf0e37e2f1fb119d8832b8568536a04< a3d91218ccca1e990bfb737b5a6da23f0afba22b affected
f6f9279f2bf0e37e2f1fb119d8832b8568536a04< 0d8c64511fd45690c5326f013710efcb4f73a97e affected
f6f9279f2bf0e37e2f1fb119d8832b8568536a04< 150bf6f1193c69252580c19d3b3cd631ddce61d7 affected
f6f9279f2bf0e37e2f1fb119d8832b8568536a04< 8fb4a23df5b7c02929b62e5dbc270ec7c42b8134 affected
f6f9279f2bf0e37e2f1fb119d8832b8568536a04< 4bfdf0a9855df55e9e031ca6a25b855820590c70 affected
f6f9279f2bf0e37e2f1fb119d8832b8568536a04< d5de9cb5355db36438edc621dde3673e3f235767 affected
f6f9279f2bf0e37e2f1fb119d8832b8568536a04< d77583ca33299fede0c194744ef2284e7ba5b763 affected
f6f9279f2bf0e37e2f1fb119d8832b8568536a04< 5401fb4fe10fac6134c308495df18ed74aebb9c4 affected
… +10 more rows
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I. Basic Information for CVE-2026-53158

Vulnerability Information
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Vulnerability Title
misc: fastrpc: Fix NULL pointer dereference in rpmsg callback
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: Fix NULL pointer dereference in rpmsg callback A NULL pointer dereference was observed on Hawi at boot when the DSP sends a glink message before fastrpc_rpmsg_probe() has completed initialization: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000178 pc : _raw_spin_lock_irqsave+0x34/0x8c lr : fastrpc_rpmsg_callback+0x3c/0xcc [fastrpc] ... Call trace: _raw_spin_lock_irqsave+0x34/0x8c (P) fastrpc_rpmsg_callback+0x3c/0xcc [fastrpc] qcom_glink_native_rx+0x538/0x6a4 qcom_glink_smem_intr+0x14/0x24 [qcom_glink_smem] The faulting address 0x178 corresponds to the lock variable inside struct fastrpc_channel_ctx, confirming that cctx is NULL when fastrpc_rpmsg_callback() attempts to take the spinlock. There are two issues here. First, dev_set_drvdata() is called before spin_lock_init() and idr_init(), leaving a window where the callback can retrieve a valid cctx pointer but operate on an uninitialized spinlock. Second, the rpmsg channel becomes live as soon as the driver is bound, so fastrpc_rpmsg_callback() can fire before dev_set_drvdata() is called at all, resulting in dev_get_drvdata() returning NULL. Fix both issues by moving all cctx initialization ahead of dev_set_drvdata() so the structure is fully initialized before it becomes visible to the callback, and add a NULL check in fastrpc_rpmsg_callback() as a guard against any remaining window.
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 5.1版本存在安全漏洞，该漏洞源于fastrpc驱动中dev_set_drvdata在spin_lock_init和idr_init之前被调用，并且rpmsg通道在驱动绑定后立即激活，导致fastrpc_rpmsg_callback触发时cctx为空指针，可能造成空指针取消引用。
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 f6f9279f2bf0e37e2f1fb119d8832b8568536a04 ~ a3d91218ccca1e990bfb737b5a6da23f0afba22b -
Linux Linux 5.1 -

II. Public POCs for CVE-2026-53158

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III. Intelligence Information for CVE-2026-53158

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Patches & Fixes for CVE-2026-53158 (7)

Same Patch Batch · Linux · 2026-06-25 · 146 CVEs total

CVE-2026-53247 9.8 CRITICAL net: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown
CVE-2026-53215 9.8 CRITICAL net: mvpp2: refill RX buffers before XDP or skb use
CVE-2026-53216 9.8 CRITICAL net: mvpp2: limit XDP frame size to the RX buffer
CVE-2026-53246 9.8 CRITICAL sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing
CVE-2026-53151 9.8 CRITICAL rxrpc: Fix the ACK parser to extract the SACK table for parsing
CVE-2026-53221 9.8 CRITICAL ip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup()
CVE-2026-53260 9.8 CRITICAL tcp: Add preempt_{disable,enable}_nested() in reqsk_queue_hash_req().
CVE-2026-53175 9.8 CRITICAL inet: frags: fix use-after-free caused by the fqdir_pre_exit() flush
CVE-2026-53176 9.8 CRITICAL IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN
CVE-2026-53228 9.8 CRITICAL ipv6: sit: reload inner IPv6 header after GSO offloads
CVE-2026-53131 9.4 CRITICAL netfilter: require Ethernet MAC header before using eth_hdr()
CVE-2026-53225 9.1 CRITICAL sctp: fix uninit-value in __sctp_rcv_asconf_lookup()
CVE-2026-53224 9.1 CRITICAL sctp: validate embedded INIT chunk and address list lengths in cookie
CVE-2026-53186 9.1 CRITICAL RDMA/srp: bound SRP_RSP sense copy by the received length
CVE-2026-53240 8.8 HIGH xfrm: iptfs: fix use-after-free on first_skb in __input_process_payload
CVE-2026-53170 8.8 HIGH accel/ethosu: reject DMA commands with uninitialized length
CVE-2026-53248 8.8 HIGH net: airoha: Fix use-after-free in metadata dst teardown
CVE-2026-53200 8.8 HIGH KVM: arm64: nv: Fix handling of XN[0] when !FEAT_XNX
CVE-2026-53198 8.8 HIGH ksmbd: fix use-after-free of a deferred file_lock on double SMB2_CANCEL
CVE-2026-53188 8.8 HIGH RDMA/core: Validate the passed in fops for ib_get_ucaps()

Showing top 20 of 146 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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