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This\ncan avoid a nested loop (up to 65535 * 65535), which may cause a\nstuck as Ying reported:\n\n watchdog: BUG: soft lockup - CPU#23 stuck for 26s! [ksoftirqd/23:136]\n Call Trace:\n <TASK>\n sctp_sched_prio_free_sid+0xab/0x100 [sctp]\n sctp_stream_free_ext+0x64/0xa0 [sctp]\n sctp_stream_free+0x31/0x50 [sctp]\n sctp_association_free+0xa5/0x200 [sctp]\n\nNote that it doesn't need to use refcount_t type for this counter,\nas its accessing is always protected under the sock lock.\n\nv1->v2:\n - add a check in sctp_sched_prio_set to avoid the possible prio_head\n refcnt overflow."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/sctp/structs.h", "net/sctp/stream_sched_prio.c"], "versions": [{"version": "a7555681e50bdebed2c40ff7404ee73c2e932993", "lessThan": "cec326443f01283ef68ea00c06ea073b1835a562", "status": "affected", "versionType": "git"}, {"version": "176ee6c673ccd118e9392fd2dbb165423bdb99ca", "lessThan": "8ee401f89cdb10f39098c0656d695b2bc4052100", "status": "affected", "versionType": "git"}, {"version": "0dfb9a566327182387c90100ea54d8426cee8c67", "lessThan": "bf5540cbd20e2dae2c81ab9b31deef41ef147d0a", "status": "affected", "versionType": "git"}, {"version": "9ed7bfc79542119ac0a9e1ce8a2a5285e43433e9", "lessThan": "03c3a5584a0a29821e59b7834635ce823050caaa", "status": "affected", "versionType": "git"}, {"version": "9ed7bfc79542119ac0a9e1ce8a2a5285e43433e9", "lessThan": "6d529928ea212127851a2df8c40d822237ca946b", "status": "affected", "versionType": "git"}, {"version": "9ed7bfc79542119ac0a9e1ce8a2a5285e43433e9", "lessThan": "68ba44639537de6f91fe32783766322d41848127", "status": "affected", "versionType": "git"}, {"version": "fa20f88271259d42ebe66f0a8c4c20199e888c99", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/sctp/structs.h", "net/sctp/stream_sched_prio.c"], "versions": [{"version": "6.1", "status": "affected"}, {"version": "0", "lessThan": "6.1", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.235", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.173", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.100", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.18", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2.5", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.3", "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": "5.4.226", "versionEndExcluding": "5.4.235"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.158", "versionEndExcluding": "5.10.173"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.82", "versionEndExcluding": "5.15.100"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.1.18"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0.12"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/cec326443f01283ef68ea00c06ea073b1835a562"}, {"url": "https://git.kernel.org/stable/c/8ee401f89cdb10f39098c0656d695b2bc4052100"}, {"url": "https://git.kernel.org/stable/c/bf5540cbd20e2dae2c81ab9b31deef41ef147d0a"}, {"url": "https://git.kernel.org/stable/c/03c3a5584a0a29821e59b7834635ce823050caaa"}, {"url": "https://git.kernel.org/stable/c/6d529928ea212127851a2df8c40d822237ca946b"}, {"url": "https://git.kernel.org/stable/c/68ba44639537de6f91fe32783766322d41848127"}], "title": "sctp: add a refcnt in sctp_stream_priorities to avoid a nested loop", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: sctp: add a refcnt in sctp_stream_priorities to avoid a nested loop", "id": "2401468", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2401468"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsctp: add a refcnt in sctp_stream_priorities to avoid a nested loop\nWith this refcnt added in sctp_stream_priorities, we don't need to\ntraverse all streams to check if the prio is used by other streams\nwhen freeing one stream's prio in sctp_sched_prio_free_sid(). This\ncan avoid a nested loop (up to 65535 * 65535), which may cause a\nstuck as Ying reported:\nwatchdog: BUG: soft lockup - CPU#23 stuck for 26s! [ksoftirqd/23:136]\nCall Trace:\n<TASK>\nsctp_sched_prio_free_sid+0xab/0x100 [sctp]\nsctp_stream_free_ext+0x64/0xa0 [sctp]\nsctp_stream_free+0x31/0x50 [sctp]\nsctp_association_free+0xa5/0x200 [sctp]\nNote that it doesn't need to use refcount_t type for this counter,\nas its accessing is always protected under the sock lock.\nv1->v2:\n- add a check in sctp_sched_prio_set to avoid the possible prio_head\nrefcnt overflow."], "name": "CVE-2023-53590", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:rhivos:1", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat In-Vehicle Operating System 1"}], "public_date": "2025-10-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53590\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53590\nhttps://lore.kernel.org/linux-cve-announce/2025100427-CVE-2023-53590-9f1d@gregkh/T"], "threat_severity": "Moderate"}