CVE-2026-64398

CVE-2026-64398 affects the Linux kernel ksmbd component. A permission check bypass in FSCTL_SET_ZERO_DATA allows an authenticated SMB client with only FILE_WRITE_ATTRIBUTES to zero out file data via fsctl path, bypassing per-handle checks. The operation uses vfs_fallocate(PUNCH_HOLE/ZERO_RANGE) a...

EUVD-2026-48942

In the Linux kernel, the following vulnerability has been resolved: ksmbd: add a permission check for FSCTLSETZERODATA FSCTLSETZERODATA in smb2ioctl destroys file data via ksmbdvfszerodata - vfsfallocatePUNCHHOLE/ZERORANGE after checking only the share-level KSMBDTREECONNFLAGWRITABLE, with no...

CVE-2026-64398

In the Linux kernel, the following vulnerability has been resolved: ksmbd: add a permission check for FSCTLSETZERODATA FSCTLSETZERODATA in smb2ioctl destroys file data via ksmbdvfszerodata - vfsfallocatePUNCHHOLE/ZERORANGE after checking only the share-level KSMBDTREECONNFLAGWRITABLE, with no...

CVE-2026-64398 ksmbd: add a permission check for FSCTL_SET_ZERO_DATA

In the Linux kernel, the following vulnerability has been resolved: ksmbd: add a permission check for FSCTLSETZERODATA FSCTLSETZERODATA in smb2ioctl destroys file data via ksmbdvfszerodata - vfsfallocatePUNCHHOLE/ZERORANGE after checking only the share-level KSMBDTREECONNFLAGWRITABLE, with no...

CVE-2026-64394 ksmbd: add a WRITE_DAC/WRITE_OWNER check to SMB2 SET_INFO SECURITY

In the Linux kernel, the following vulnerability has been resolved: ksmbd: add a WRITEDAC/WRITEOWNER check to SMB2 SETINFO SECURITY commit cc57232cae23 "ksmbd: fix FSCTL permission bypass by adding a permission check for FSCTLSETSPARSE" added a fp-daccess gate to fsctlsetsparse and noted that...

CVE-2026-64394

Summary: CVE-2026-64394 relates to the Linux kernel ksmbd SMB2 SET_INFO SECURITY path. The fix adds a per-handle access gate to prevent rewriting security descriptors when the handle lacks WRITE_DAC/WRITE_OWNER. Previously, SMB2_SET_INFO with InfoType SMB2_O_INFO_SECURITY could re-permission a fi...

CVE-2026-64381

The CVE-2026-64381 issue is in the Linux kernel SMB client code path used by receive_encrypted_standard()/receive encrypted standard(): a next_buffer is allocated before validating that the number of compound PDUs has not exceeded MAX_COMPOUND. If the limit check fails, the function returns early...

EUVD-2026-48924

In the Linux kernel, the following vulnerability has been resolved: smb: client: harden POSIX SID length parsing posixinfosidsize reads sid1 to obtain the subauthority count, but its existing boundary check still accepts buffers with only one remaining byte. Require two bytes before reading sid1 ...

CVE-2026-64380 smb: client: harden POSIX SID length parsing

In the Linux kernel, the following vulnerability has been resolved: smb: client: harden POSIX SID length parsing posixinfosidsize reads sid1 to obtain the subauthority count, but its existing boundary check still accepts buffers with only one remaining byte. Require two bytes before reading sid1 ...

CVE-2026-64380

The CVE-2026-64380 issue affects the Linux kernel SMB client path handling of POSIX SIDs. The root cause is in posix_info_sid_size(), which reads sid[1] to obtain the subauthority count but previously allowed buffers with only one remaining byte, potentially enabling unsafe rejection of truncated...

EUVD-2026-48905

In the Linux kernel, the following vulnerability has been resolved: hfs/hfsplus: fix u32 overflow in checkandcorrectrequestedlength checkandcorrectrequestedlength compares off + len against nodesize using u32 arithmetic. When the caller passes a large len value e.g. from an underflowed subtractio...

CVE-2026-64361 hfs/hfsplus: fix u32 overflow in check_and_correct_requested_length

In the Linux kernel, the following vulnerability has been resolved: hfs/hfsplus: fix u32 overflow in checkandcorrectrequestedlength checkandcorrectrequestedlength compares off + len against nodesize using u32 arithmetic. When the caller passes a large len value e.g. from an underflowed subtractio...

CVE-2026-64361 hfs/hfsplus: fix u32 overflow in check_and_correct_requested_length

In the Linux kernel, the following vulnerability has been resolved: hfs/hfsplus: fix u32 overflow in checkandcorrectrequestedlength checkandcorrectrequestedlength compares off + len against nodesize using u32 arithmetic. When the caller passes a large len value e.g. from an underflowed subtractio...

CVE-2026-64357 xfs: fix exchmaps reservation limit check

In the Linux kernel, the following vulnerability has been resolved: xfs: fix exchmaps reservation limit check xfsexchmapsestimateoverhead adds the bmbt and rmapbt overhead to a local resblks variable, but the final UINTMAX check still tests req-resblks. That is the reservation value from before t...

CVE-2026-64354

The CVE-2026-64354 entry concerns the Linux kernel BPF component, specifically btf_repeat_fields() handling of user-supplied BTF data during BPF_BTF_LOAD. A malformed BTF can trigger an integer overflow when calculating the expanded field count, allowing a heap out-of-bounds write past the fixed ...

CVE-2026-64339

CVE-2026-64339 affects the Linux kernel USB IO stack (usbio_bulk_msg). A malicious device that advertises a large bulk OUT and small bulk IN endpoint can set bpkt_len (from bpkt->len) to exceed rxbuf_len, causing memcpy to read past rxbuf and leak adjacent slab memory via i2c-dev. The code alr...

EUVD-2026-48874

In the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm: Validate SVID index in svdmconsumemodes In svdmconsumemodes, the SVID value is read from pmdata-svids using pmdata-svidindex as an array index without bounds validation: paltmode-svid =...

CVE-2026-64330 usb: typec: tcpm: Validate SVID index in svdm_consume_modes()

In the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm: Validate SVID index in svdmconsumemodes In svdmconsumemodes, the SVID value is read from pmdata-svids using pmdata-svidindex as an array index without bounds validation: paltmode-svid =...

CVE-2026-64330

CVE-2026-64330 (Linux kernel, usb: typec: tcpm) A bounds-checking flaw exists in svdm_consume_modes() where the SVID value is read from pmdata->svids[pmdata->svid_index] without validating the index. If svid_index is driven beyond SVID_DISCOVERY_MAX (16), it can read past the svids array in...

EUVD-2026-48869

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7921/mt7925: fix NULL dereference in CSA beacon This patch is based on a BUG as reported by Bongani Hlope at https://lore.kernel.org/all/[email protected]/ When a channel-switch...