CVE-2026-53158 (GCVE-0-2026-53158)
Vulnerability from cvelistv5 – Published: 2026-06-25 08:38 – Updated: 2026-07-04 11:50
VLAI
EPSS
VEX
Title
misc: fastrpc: Fix NULL pointer dereference in rpmsg callback
Summary
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.
Severity
5.5 (Medium)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
f6f9279f2bf0e37e2f1fb119d8832b8568536a04 , < a3d91218ccca1e990bfb737b5a6da23f0afba22b
(git)
Affected: f6f9279f2bf0e37e2f1fb119d8832b8568536a04 , < 0d8c64511fd45690c5326f013710efcb4f73a97e (git) Affected: f6f9279f2bf0e37e2f1fb119d8832b8568536a04 , < 150bf6f1193c69252580c19d3b3cd631ddce61d7 (git) Affected: f6f9279f2bf0e37e2f1fb119d8832b8568536a04 , < 8fb4a23df5b7c02929b62e5dbc270ec7c42b8134 (git) Affected: f6f9279f2bf0e37e2f1fb119d8832b8568536a04 , < 4bfdf0a9855df55e9e031ca6a25b855820590c70 (git) Affected: f6f9279f2bf0e37e2f1fb119d8832b8568536a04 , < d5de9cb5355db36438edc621dde3673e3f235767 (git) Affected: f6f9279f2bf0e37e2f1fb119d8832b8568536a04 , < d77583ca33299fede0c194744ef2284e7ba5b763 (git) Affected: f6f9279f2bf0e37e2f1fb119d8832b8568536a04 , < 5401fb4fe10fac6134c308495df18ed74aebb9c4 (git) |
guessed | |
| Linux | Linux |
Affected:
5.1
Unaffected: 0 , < 5.1 (semver) Unaffected: 5.10.260 , ≤ 5.10.* (semver) Unaffected: 5.15.211 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: Fix NULL pointer dereference in rpmsg callback\n\nA NULL pointer dereference was observed on Hawi at boot when the DSP\nsends a glink message before fastrpc_rpmsg_probe() has completed\ninitialization:\n\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000178\n pc : _raw_spin_lock_irqsave+0x34/0x8c\n lr : fastrpc_rpmsg_callback+0x3c/0xcc [fastrpc]\n ...\n Call trace:\n _raw_spin_lock_irqsave+0x34/0x8c (P)\n fastrpc_rpmsg_callback+0x3c/0xcc [fastrpc]\n qcom_glink_native_rx+0x538/0x6a4\n qcom_glink_smem_intr+0x14/0x24 [qcom_glink_smem]\n\nThe faulting address 0x178 corresponds to the lock variable inside\nstruct fastrpc_channel_ctx, confirming that cctx is NULL when\nfastrpc_rpmsg_callback() attempts to take the spinlock.\n\nThere are two issues here. First, dev_set_drvdata() is called before\nspin_lock_init() and idr_init(), leaving a window where the callback\ncan retrieve a valid cctx pointer but operate on an uninitialized\nspinlock. Second, the rpmsg channel becomes live as soon as the driver\nis bound, so fastrpc_rpmsg_callback() can fire before dev_set_drvdata()\nis called at all, resulting in dev_get_drvdata() returning NULL.\n\nFix both issues by moving all cctx initialization ahead of\ndev_set_drvdata() so the structure is fully initialized before it\nbecomes visible to the callback, and add a NULL check in\nfastrpc_rpmsg_callback() as a guard against any remaining window."
}
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First, dev_set_drvdata() is called before\\nspin_lock_init() and idr_init(), leaving a window where the callback\\ncan retrieve a valid cctx pointer but operate on an uninitialized\\nspinlock. Second, the rpmsg channel becomes live as soon as the driver\\nis bound, so fastrpc_rpmsg_callback() can fire before dev_set_drvdata()\\nis called at all, resulting in dev_get_drvdata() returning NULL.\\n\\nFix both issues by moving all cctx initialization ahead of\\ndev_set_drvdata() so the structure is fully initialized before it\\nbecomes visible to the callback, and add a NULL check in\\nfastrpc_rpmsg_callback() as a guard against any remaining 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"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-06-26T09:11:27+00:00",
"cve": "CVE-2026-53158",
"id": "CVE-2026-53158",
"initial_release_date": "2026-06-25T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: misc: fastrpc: Fix NULL pointer dereference in rpmsg callback",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53158.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-31T16:44:31Z",
"cve": "CVE-2026-53158",
"id": "CVE-2026-53158",
"initial_release_date": "2026-06-26T02:11:46Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "474",
"product_status:known_not_affected": "140",
"product_status:recommended": "250",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-53158",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53158.json",
"version": "10"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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