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

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013561 advisory.

    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

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-010955 advisory.

    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

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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     (CVE-2022-50753)

Note that Nessus relies on the presence of the package as reported by the vendor.

An update of the linux package has been released.

ID	Name	Product	Family	Severity
309319	Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-013561)	Nessus	Unity Linux Local Security Checks	high
308561	Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-010955)	Nessus	Unity Linux Local Security Checks	high
280057	Linux Distros Unpatched Vulnerability : CVE-2022-50753	Nessus	Misc.	high
151965	Photon OS 4.0: Linux PHSA-2021-4.0-0065	Nessus	PhotonOS Local Security Checks	high

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