{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53158", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.388Z", "datePublished": "2026-06-25T08:38:40.818Z", "dateUpdated": "2026-06-25T08:38:40.818Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-25T08:38:40.818Z"}, "descriptions": [{"lang": "en", "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/misc/fastrpc.c"], "versions": [{"version": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04", "lessThan": "8fb4a23df5b7c02929b62e5dbc270ec7c42b8134", "status": "affected", "versionType": "git"}, {"version": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04", "lessThan": "4bfdf0a9855df55e9e031ca6a25b855820590c70", "status": "affected", "versionType": "git"}, {"version": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04", "lessThan": "d5de9cb5355db36438edc621dde3673e3f235767", "status": "affected", "versionType": "git"}, {"version": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04", "lessThan": "d77583ca33299fede0c194744ef2284e7ba5b763", "status": "affected", "versionType": "git"}, {"version": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04", "lessThan": "5401fb4fe10fac6134c308495df18ed74aebb9c4", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/misc/fastrpc.c"], "versions": [{"version": "5.1", "status": "affected"}, {"version": "0", "lessThan": "5.1", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.94", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.36", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.13", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.12.94"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.18.36"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "7.0.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8fb4a23df5b7c02929b62e5dbc270ec7c42b8134"}, {"url": "https://git.kernel.org/stable/c/4bfdf0a9855df55e9e031ca6a25b855820590c70"}, {"url": "https://git.kernel.org/stable/c/d5de9cb5355db36438edc621dde3673e3f235767"}, {"url": "https://git.kernel.org/stable/c/d77583ca33299fede0c194744ef2284e7ba5b763"}, {"url": "https://git.kernel.org/stable/c/5401fb4fe10fac6134c308495df18ed74aebb9c4"}], "title": "misc: fastrpc: Fix NULL pointer dereference in rpmsg callback", "x_generator": {"engine": "bippy-1.2.0"}}}}

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