{"id":"CVE-2026-23265","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-23265","generatedAt":"2026-10-28T04:45:41.977Z","title":"In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on node footer in {read,write}_end_io -----------[ cut here ]------------ kernel BUG at fs/f2fs/data.c:358!","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to do sanity check on node footer in {read,write}_end_io\n\n-----------[ cut here ]------------\nkernel BUG at fs/f2fs/data.c:358!\nCall Trace:\n <IRQ>\n blk_update_request+0x5eb/0xe70 block/blk-mq.c:987\n blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1149\n blk_complete_reqs block/blk-mq.c:1224 [inline]\n blk_done_softirq+0x107/0x160 block/blk-mq.c:1229\n handle_softirqs+0x283/0x870 kernel/softirq.c:579\n __do_softirq kernel/softirq.c:613 [inline]\n invoke_softirq kernel/softirq.c:453 [inline]\n __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680\n irq_exit_rcu+0x9/0x30 kernel/softirq.c:696\n instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]\n sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050\n </IRQ>\n\nIn f2fs_write_end_io(), it detects there is inconsistency in between\nnode page index (nid) and footer.nid of node page.\n\nIf footer of node page is corrupted in fuzzed image, then we load corrupted\nnode page w/ async method, e.g. f2fs_ra_node_pages() or f2fs_ra_node_page(),\nin where we won't do sanity check on node footer, once node page becomes\ndirty, we will encounter this bug after node page writeback.","published":"2026-03-18T18:16:25.000Z","lastModified":"2026-06-17T10:21:13.000Z","status":"Analyzed","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":[],"affected":["linux/linux kernel"],"epss":{"score":0.00117,"percentile":0.01645,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.12%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/50ac3ecd8e05b6bcc350c71a4307d40c030ec7e4","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/855c54f1803e3ebc613677b4f389c7f92656a1fc","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c386753db52b3a80afa6612bfdcb925aa5ca260f","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-23265","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}