CVE-2022-50753 | THREATINT

Description

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on summary info As Wenqing Liu reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=216456 BUG: KASAN: use-after-free in recover_data+0x63ae/0x6ae0 [f2fs] Read of size 4 at addr ffff8881464dcd80 by task mount/1013 CPU: 3 PID: 1013 Comm: mount Tainted: G W 6.0.0-rc4 #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014 Call Trace: dump_stack_lvl+0x45/0x5e print_report.cold+0xf3/0x68d kasan_report+0xa8/0x130 recover_data+0x63ae/0x6ae0 [f2fs] f2fs_recover_fsync_data+0x120d/0x1fc0 [f2fs] f2fs_fill_super+0x4665/0x61e0 [f2fs] mount_bdev+0x2cf/0x3b0 legacy_get_tree+0xed/0x1d0 vfs_get_tree+0x81/0x2b0 path_mount+0x47e/0x19d0 do_mount+0xce/0xf0 __x64_sys_mount+0x12c/0x1a0 do_syscall_64+0x38/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd The root cause is: in fuzzed image, SSA table is corrupted: ofs_in_node is larger than ADDRS_PER_PAGE(), result in out-of-range access on 4k-size page. - recover_data - do_recover_data - check_index_in_prev_nodes - f2fs_data_blkaddr This patch adds sanity check on summary info in recovery and GC flow in where the flows rely on them. After patch: [ 29.310883] F2FS-fs (loop0): Inconsistent ofs_in_node:65286 in summary, ino:0, nid:6, max:1018

PUBLISHED Reserved 2025-12-24 | Published 2025-12-24 | Updated 2025-12-24 | Assigner Linux

Product status

Default status

unaffected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before c99860f9a75079f339ed7670425b1ac58f26e2ff

affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 4a8e8bf280703e04e0b9d91f101e1fdd9a5bd09e

affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 73687c53919f49dff3852155621dab7a35c52854

affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before e168f819bfa42459b14f479e55ebd550bcc78899

affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 0922ad64ccefa3e483e84355942b86e13c8fea68

affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before c6ad7fd16657ebd34a87a97d9588195aae87597d

affected

Default status

affected

5.4.220 (semver)

unaffected

5.10.150 (semver)

unaffected

5.15.75 (semver)

unaffected

5.19.17 (semver)

unaffected

6.0.3 (semver)

unaffected

6.1 (original_commit_for_fix)

unaffected

References

git.kernel.org/...c/c99860f9a75079f339ed7670425b1ac58f26e2ff

git.kernel.org/...c/4a8e8bf280703e04e0b9d91f101e1fdd9a5bd09e

git.kernel.org/...c/73687c53919f49dff3852155621dab7a35c52854

git.kernel.org/...c/e168f819bfa42459b14f479e55ebd550bcc78899

git.kernel.org/...c/0922ad64ccefa3e483e84355942b86e13c8fea68

git.kernel.org/...c/c6ad7fd16657ebd34a87a97d9588195aae87597d

cve.org (CVE-2022-50753)

nvd.nist.gov (CVE-2022-50753)

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