{"cve":{"cve_id":"CVE-2026-53197","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: iptfs: fix ABBA deadlock in iptfs_destroy_state()\n\niptfs_destroy_state() calls hrtimer_cancel() while holding a spinlock\nthat the timer callback also acquires, leading to an ABBA deadlock on\nSMP systems.\n\nFor the output timer (iptfs_timer):\n  - iptfs_destroy_state() holds x->lock, calls hrtimer_cancel()\n  - iptfs_delay_timer() callback takes x->lock\n\nFor the drop timer (drop_timer):\n  - iptfs_destroy_state() holds drop_lock, calls hrtimer_cancel()\n  - iptfs_drop_timer() callback takes drop_lock\n\nBoth timers use HRTIMER_MODE_REL_SOFT, so their callbacks run in softirq\ncontext.  When hrtimer_cancel() is called for a soft timer that is\ncurrently executing on another CPU, hrtimer_cancel_wait_running() spins\non softirq_expiry_lock -- the same lock held by the softirq running the\ncallback.  If the callback is blocked waiting for the spinlock held by\nthe caller of hrtimer_cancel(), a circular dependency forms:\n\n  CPU 0: holds lock_A -> waits for softirq_expiry_lock\n  CPU 1: holds softirq_expiry_lock -> waits for lock_A\n\nFix by calling hrtimer_cancel() before acquiring the respective locks.\nhrtimer_cancel() is safe to call without holding any lock and will wait\nfor any in-progress callback to complete.  For the output timer, the\nlock is still acquired afterwards to drain the packet queue.  For the\ndrop timer, the lock/unlock pair is removed entirely since it only\nexisted to serialize with the timer callback, which hrtimer_cancel()\nalready guarantees.\n\nFound by source code audit.","published_at":"2026-06-25T08:39:06.991000Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["https://git.kernel.org/stable/c/a13ca53e47e500854a3b9ec18b5dc83acfec863e","https://git.kernel.org/stable/c/822b98d354e63e8249e85473c5f3c519f3c9cecc","https://git.kernel.org/stable/c/c8a8a75b733467b00c08b91a38dbaf207a08ed6e"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:55:28.590503Z","updated_at":"2026-06-28T23:30:51.545322Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"4b3faf610cc63bfac972711635eafbca5e7d7117","version_start_inclusive":true,"version_end":"a13ca53e47e500854a3b9ec18b5dc83acfec863e","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:4b3faf610cc63bfac972711635eafbca5e7d7117:a13ca53e47e500854a3b9ec18b5dc83acfec863e"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"4b3faf610cc63bfac972711635eafbca5e7d7117","version_start_inclusive":true,"version_end":"822b98d354e63e8249e85473c5f3c519f3c9cecc","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:4b3faf610cc63bfac972711635eafbca5e7d7117:822b98d354e63e8249e85473c5f3c519f3c9cecc"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"4b3faf610cc63bfac972711635eafbca5e7d7117","version_start_inclusive":true,"version_end":"c8a8a75b733467b00c08b91a38dbaf207a08ed6e","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:4b3faf610cc63bfac972711635eafbca5e7d7117:c8a8a75b733467b00c08b91a38dbaf207a08ed6e"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.14","version_start_inclusive":true,"version_end":"6.14","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.14:6.14"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"6.14","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:6.14"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18.36","version_start_inclusive":true,"version_end":"6.18.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.18.36:6.18.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.0.13","version_start_inclusive":true,"version_end":"7.0.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.0.13:7.0.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.1","version_start_inclusive":true,"version_end":"*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.1:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://git.kernel.org/stable/c/a13ca53e47e500854a3b9ec18b5dc83acfec863e","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/822b98d354e63e8249e85473c5f3c519f3c9cecc","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/c8a8a75b733467b00c08b91a38dbaf207a08ed6e","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-25T08:39:06.991000Z","label":"CVE published","source":null}]}