{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2023-53419", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-17T14:54:09.741Z", "datePublished": "2025-09-18T16:04:02.955Z", "dateUpdated": "2025-09-18T16:04:02.955Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-09-18T16:04:02.955Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrcu: Protect rcu_print_task_exp_stall() ->exp_tasks access\n\nFor kernels built with CONFIG_PREEMPT_RCU=y, the following scenario can\nresult in a NULL-pointer dereference:\n\n CPU1 CPU2\nrcu_preempt_deferred_qs_irqrestore rcu_print_task_exp_stall\n if (special.b.blocked) READ_ONCE(rnp->exp_tasks) != NULL\n raw_spin_lock_rcu_node\n np = rcu_next_node_entry(t, rnp)\n if (&t->rcu_node_entry == rnp->exp_tasks)\n WRITE_ONCE(rnp->exp_tasks, np)\n ....\n raw_spin_unlock_irqrestore_rcu_node\n raw_spin_lock_irqsave_rcu_node\n t = list_entry(rnp->exp_tasks->prev,\n struct task_struct, rcu_node_entry)\n (if rnp->exp_tasks is NULL, this\n will dereference a NULL pointer)\n\nThe problem is that CPU2 accesses the rcu_node structure's->exp_tasks\nfield without holding the rcu_node structure's ->lock and CPU2 did\nnot observe CPU1's change to rcu_node structure's ->exp_tasks in time.\nTherefore, if CPU1 sets rcu_node structure's->exp_tasks pointer to NULL,\nthen CPU2 might dereference that NULL pointer.\n\nThis commit therefore holds the rcu_node structure's ->lock while\naccessing that structure's->exp_tasks field.\n\n[ paulmck: Apply Frederic Weisbecker feedback. ]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/rcu/tree_exp.h"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "a7d21b8585894e6fff973f6ddae42f02b13f600f", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "e30a55e98ae6c44253d8b129efefd5da5bc6e3bc", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "d0a8c0e31a09ec1efd53079083e2a677956b4d91", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "2bc0ae94ef1f9ed322d8ee439de3239ea3632ab2", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "3c1566bca3f8349f12b75d0a2d5e4a20ad6262ec", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/rcu/tree_exp.h"], "versions": [{"version": "5.10.181", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.113", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.30", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.3.4", "lessThanOrEqual": "6.3.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.4", "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:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.10.181"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.15.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.1.30"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.3.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a7d21b8585894e6fff973f6ddae42f02b13f600f"}, {"url": "https://git.kernel.org/stable/c/e30a55e98ae6c44253d8b129efefd5da5bc6e3bc"}, {"url": "https://git.kernel.org/stable/c/d0a8c0e31a09ec1efd53079083e2a677956b4d91"}, {"url": "https://git.kernel.org/stable/c/2bc0ae94ef1f9ed322d8ee439de3239ea3632ab2"}, {"url": "https://git.kernel.org/stable/c/3c1566bca3f8349f12b75d0a2d5e4a20ad6262ec"}], "title": "rcu: Protect rcu_print_task_exp_stall() ->exp_tasks access", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrcu: Protect rcu_print_task_exp_stall() ->exp_tasks access\n\nFor kernels built with CONFIG_PREEMPT_RCU=y, the following scenario can\nresult in a NULL-pointer dereference:\n\n CPU1 CPU2\nrcu_preempt_deferred_qs_irqrestore rcu_print_task_exp_stall\n if (special.b.blocked) READ_ONCE(rnp->exp_tasks) != NULL\n raw_spin_lock_rcu_node\n np = rcu_next_node_entry(t, rnp)\n if (&t->rcu_node_entry == rnp->exp_tasks)\n WRITE_ONCE(rnp->exp_tasks, np)\n ....\n raw_spin_unlock_irqrestore_rcu_node\n raw_spin_lock_irqsave_rcu_node\n t = list_entry(rnp->exp_tasks->prev,\n struct task_struct, rcu_node_entry)\n (if rnp->exp_tasks is NULL, this\n will dereference a NULL pointer)\n\nThe problem is that CPU2 accesses the rcu_node structure's->exp_tasks\nfield without holding the rcu_node structure's ->lock and CPU2 did\nnot observe CPU1's change to rcu_node structure's ->exp_tasks in time.\nTherefore, if CPU1 sets rcu_node structure's->exp_tasks pointer to NULL,\nthen CPU2 might dereference that NULL pointer.\n\nThis commit therefore holds the rcu_node structure's ->lock while\naccessing that structure's->exp_tasks field.\n\n[ paulmck: Apply Frederic Weisbecker feedback. ]"}], "id": "CVE-2023-53419", "lastModified": "2025-09-18T16:15:45.650", "metrics": {}, "published": "2025-09-18T16:15:45.650", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2bc0ae94ef1f9ed322d8ee439de3239ea3632ab2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3c1566bca3f8349f12b75d0a2d5e4a20ad6262ec"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a7d21b8585894e6fff973f6ddae42f02b13f600f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d0a8c0e31a09ec1efd53079083e2a677956b4d91"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e30a55e98ae6c44253d8b129efefd5da5bc6e3bc"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: rcu: Protect rcu_print_task_exp_stall() ->exp_tasks access", "id": "2396493", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2396493"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2023-53419", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-09-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53419\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53419\nhttps://lore.kernel.org/linux-cve-announce/2025091855-CVE-2023-53419-8597@gregkh/T"], "threat_severity": "Low"}