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Dados de correção desconhecidos; nenhuma versão corrigida é deduzida aqui. Dados ausentes não comprovam ausência de correção. Exploração desconhecida; este catálogo não avalia exploração. ## Fatos da fonte (dados citados em JSON) Texto da CNA em inglês id: "CVE-2026-43299" idYear: 2026 status: "PUBLISHED" publishedAt: "2026-05-08T13:11:20.872Z" updatedAt: "2026-10-21T12:40:31.954Z" importedAt: "2026-10-24T01:58:14.884Z" snapshot: {"id":"cve_2026-10-24_midnight_baseline","at":"2026-10-24T00:00:00.000Z","source":"https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"} url: "https://cveboard.org/pt/cve/CVE-2026-43299" json: "https://cveboard.org/cve/CVE-2026-43299.json" sourceURL: "https://www.cve.org/CVERecord?id=CVE-2026-43299" title: "btrfs: do not ASSERT() when the fs flips RO inside btrfs_repair_io_failure()" summary: "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: do not ASSERT() when the fs flips RO inside btrfs_repair_io_failure()\n\n[BUG]\nThere is a bug report that when btrfs hits ENOSPC error in a critical\npath, btrfs flips RO (this part is expected, although the ENOSPC bug\nstill needs to be addressed).\n\nThe problem is after the RO flip, if there is a read repair pending, we\ncan hit the ASSERT() inside btrfs_repair_io_failure() like the following:\n\n BTRFS info (device vdc): relocating block group 30408704 flags metadata|raid1\n ------------[ cut here ]------------\n BTRFS: Transaction aborted (error -28)\n WARNING: fs/btrfs/extent-tree.c:3235 at __btrfs_free_extent.isra.0+0x453/0xfd0, CPU#1: btrfs/383844\n Modules linked in: kvm_intel kvm irqbypass\n [...]\n ---[ end trace 0000000000000000 ]---\n BTRFS info (device vdc state EA): 2 enospc errors during balance\n BTRFS info (device vdc state EA): balance: ended with status: -30\n BTRFS error (device vdc state EA): parent transid verify failed on logical 30556160 mirror 2 wanted 8 found 6\n BTRFS error (device vdc state EA): bdev /dev/nvme0n1 errs: wr 0, rd 0, flush 0, corrupt 10, gen 0\n [...]\n assertion failed: !(fs_info-\u003esb-\u003es_flags & SB_RDONLY) :: 0, in fs/btrfs/bio.c:938\n ------------[ cut here ]------------\n assertion failed: !(fs_info-\u003esb-\u003es_flags & SB_RDONLY) :: 0, in fs/btrfs/bio.c:938\n kernel BUG at fs/btrfs/bio.c:938!\n Oops: invalid opcode: 0000 [#1] SMP NOPTI\n CPU: 0 UID: 0 PID: 868 Comm: kworker/u8:13 Tainted: G W N 6.19.0-rc6+ #4788 PREEMPT(full)\n Tainted: [W]=WARN, [N]=TEST\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014\n Workqueue: btrfs-endio simple_end_io_work\n RIP: 0010:btrfs_repair_io_failure.cold+0xb2/0x120\n RSP: 0000:ffffc90001d2bcf0 EFLAGS: 00010246\n RAX: 0000000000000051 RBX: 0000000000001000 RCX: 0000000000000000\n RDX: 0000000000000000 RSI: ffffffff8305cf42 RDI: 00000000ffffffff\n RBP: 0000000000000002 R08: 00000000fffeffff R09: ffffffff837fa988\n R10: ffffffff8327a9e0 R11: 6f69747265737361 R12: ffff88813018d310\n R13: ffff888168b8a000 R14: ffffc90001d2bd90 R15: ffff88810a169000\n FS: 0000000000000000(0000) GS:ffff8885e752c000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n ------------[ cut here ]------------\n\n[CAUSE]\nThe cause of -ENOSPC error during the test case btrfs/124 is still\nunknown, although it's known that we still have cases where metadata can\nbe over-committed but can not be fulfilled correctly, thus if we hit\nsuch ENOSPC error inside a critical path, we have no choice but abort\nthe current transaction.\n\nThis will mark the fs read-only.\n\nThe problem is inside the btrfs_repair_io_failure() path that we require\nthe fs not to be mount read-only. This is normally fine, but if we are\ndoing a read-repair meanwhile the fs flips RO due to a critical error,\nwe can enter btrfs_repair_io_failure() with super block set to\nread-only, thus triggering the above crash.\n\n[FIX]\nJust replace the ASSERT() with a proper return if the fs is already\nread-only." affected: [{"versions":[{"version":"908960c6c0fb3b3ce3971dc0ca47b581d256b968","status":"affected","versionType":"git","lessThan":"a35b38cb4b0dd08d7cc0bd4e400208c7aeba8a72"},{"version":"908960c6c0fb3b3ce3971dc0ca47b581d256b968","status":"affected","versionType":"git","lessThan":"da3f596073de1c3cbc99941f01296968a85c8c76"},{"version":"908960c6c0fb3b3ce3971dc0ca47b581d256b968","status":"affected","versionType":"git","lessThan":"81e1ae665004b99a10686473d99f0a7cb6335f38"},{"version":"908960c6c0fb3b3ce3971dc0ca47b581d256b968","status":"affected","versionType":"git","lessThan":"f6df18c001e3dcebc08482d0adeacd0cfea08593"},{"version":"908960c6c0fb3b3ce3971dc0ca47b581d256b968","status":"affected","versionType":"git","lessThan":"8ceaad6cd6e7fa5f73b0b2796a2e85d75d37e9f3"}],"vendor":"Linux","product":"Linux","defaultStatus":"unaffected"},{"versions":[{"version":"3.13","status":"affected"},{"version":"0","status":"unaffected","versionType":"semver","lessThan":"3.13"},{"version":"6.6.160","status":"unaffected","versionType":"semver","lessThanOrEqual":"6.6.*"},{"version":"6.12.114","status":"unaffected","versionType":"semver","lessThanOrEqual":"6.12.*"},{"version":"6.18.57","status":"unaffected","versionType":"semver","lessThanOrEqual":"6.18.*"},{"version":"6.19.6","status":"unaffected","versionType":"semver","lessThanOrEqual":"6.19.*"},{"version":"7.0","status":"unaffected","versionType":"original_commit_for_fix","lessThanOrEqual":"*"}],"vendor":"Linux","product":"Linux","defaultStatus":"affected"}] ## Licenças e atribuição das fontes CISA Known Exploited Vulnerabilities: https://www.cisa.gov/known-exploited-vulnerabilities-catalog (US government work) GitHub Advisory Database: https://github.com/advisories (CC BY 4.0) Have I Been Pwned: https://haveibeenpwned.com/ (CC BY 4.0) CVE Program (CVE records): https://www.cve.org/Legal/TermsOfUse (CVE Terms of Use) Copyright © 1999-2026, The MITRE Corporation. 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