CVE-2026-89791 perf: Fix use-after-free when perf mmap() revival races with the last munmap()

In the Linux kernel, the following vulnerability has been resolved: perf: Fix use-after-free when perf mmap revival races with the last munmap perfmmapclose drops rb-mmapcount without holding event-mmapmutex the refcountdecandtest right before the refcountdecandmutexlock of event-mmapcount. A...

CVE-2026-89790 ipv6: avoid divide by zero in rt6_multipath_rebalance

In the Linux kernel, the following vulnerability has been resolved: ipv6: avoid divide by zero in rt6multipathrebalance rt6multipathrebalance calculates the total eligible nexthop weight in one pass and programs upper bounds in a second pass. Since RTMNEWROUTE is RTNL-free, a concurrent...

CVE-2026-89790

CVE-2026-89790 is a divide-by-zero vulnerability in the Linux kernel IPv6 routing code, specifically in rt6_multipath_rebalance() (net/ipv6/route.c). Because RTM_NEWROUTE operates without the RTNL lock, a concurrent update to ignore_routes_with_linkdown can cause the first pass to compute a zero ...

EUVD-2026-80311

In the Linux kernel, the following vulnerability has been resolved: ipv6: avoid divide by zero in rt6multipathrebalance rt6multipathrebalance calculates the total eligible nexthop weight in one pass and programs upper bounds in a second pass. Since RTMNEWROUTE is RTNL-free, a concurrent...

CVE-2026-89790 ipv6: avoid divide by zero in rt6_multipath_rebalance

In the Linux kernel, the following vulnerability has been resolved: ipv6: avoid divide by zero in rt6multipathrebalance rt6multipathrebalance calculates the total eligible nexthop weight in one pass and programs upper bounds in a second pass. Since RTMNEWROUTE is RTNL-free, a concurrent...

CVE-2026-89789 gtp: add synchronize_net() in gtp_newlink() error path to prevent use-after-free

In the Linux kernel, the following vulnerability has been resolved: gtp: add synchronizenet in gtpnewlink error path to prevent use-after-free gtpnewlink's error path frees tidhash and addrhash without waiting for an RCU grace period after clearing skuserdata. A concurrent gtpencaprecv in softirq...

EUVD-2026-80309

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix tree connection use-after-free in smb2treeconnect ksmbdtreeconnconnect publishes a new tree connection in sess-treeconns with a single reference and returns its pointer to smb2treeconnect. The handler continues to...

CVE-2026-89789 gtp: add synchronize_net() in gtp_newlink() error path to prevent use-after-free

In the Linux kernel, the following vulnerability has been resolved: gtp: add synchronizenet in gtpnewlink error path to prevent use-after-free gtpnewlink's error path frees tidhash and addrhash without waiting for an RCU grace period after clearing skuserdata. A concurrent gtpencaprecv in softirq...

CVE-2026-89788 ksmbd: fix tree connection use-after-free in smb2_tree_connect()

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix tree connection use-after-free in smb2treeconnect ksmbdtreeconnconnect publishes a new tree connection in sess-treeconns with a single reference and returns its pointer to smb2treeconnect. The handler continues to...

CVE-2026-89788 ksmbd: fix tree connection use-after-free in smb2_tree_connect()

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix tree connection use-after-free in smb2treeconnect ksmbdtreeconnconnect publishes a new tree connection in sess-treeconns with a single reference and returns its pointer to smb2treeconnect. The handler continues to...

CVE-2026-89788

CVE-2026-89788 is a use-after-free vulnerability in the Linux kernel's ksmbd (SMB server) subsystem, specifically in smb2_tree_connect() (fs/smb/server/smb2pdu.c). A race condition exists where ksmbd_tree_conn_connect() publishes a new tree connection with a single reference, but a concurrent ses...

EUVD-2026-80310

In the Linux kernel, the following vulnerability has been resolved: gtp: add synchronizenet in gtpnewlink error path to prevent use-after-free gtpnewlink's error path frees tidhash and addrhash without waiting for an RCU grace period after clearing skuserdata. A concurrent gtpencaprecv in softirq...

CVE-2026-89787 ext4: check dir entry fits before reading the hash trailer in ext4_search_dir()

In the Linux kernel, the following vulnerability has been resolved: ext4: check dir entry fits before reading the hash trailer in ext4searchdir For casefolded encrypted directories ext4 stores an 8-byte hash trailer after the name EXT4DIRENTHASHES, at an offset derived from de-namelen. On the...

EUVD-2026-80308

In the Linux kernel, the following vulnerability has been resolved: ext4: check dir entry fits before reading the hash trailer in ext4searchdir For casefolded encrypted directories ext4 stores an 8-byte hash trailer after the name EXT4DIRENTHASHES, at an offset derived from de-namelen. On the...

CVE-2026-89787 ext4: check dir entry fits before reading the hash trailer in ext4_search_dir()

In the Linux kernel, the following vulnerability has been resolved: ext4: check dir entry fits before reading the hash trailer in ext4searchdir For casefolded encrypted directories ext4 stores an 8-byte hash trailer after the name EXT4DIRENTHASHES, at an offset derived from de-namelen. On the...

EUVD-2026-80306

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: fix out-of-bounds read of INDEXROOT in reparse/objid init ntfsreparseinit and ntfsobjidinit parse the index root of the $Extend/$Reparse and $Extend/$ObjId metafiles the INDEXROOT attributes named $R and $O. They read i...

CVE-2026-89786

In the Linux kernel, the following vulnerability has been resolved: ext4: fix out-of-bounds read in ext4readinlinedir ext4readinlinedir can read a dirent header past the end of its inline buffer, triggering a slab-out-of-bounds read during getdents64: BUG: KASAN: slab-out-of-bounds in...

EUVD-2026-80307

In the Linux kernel, the following vulnerability has been resolved: ext4: fix out-of-bounds read in ext4readinlinedir ext4readinlinedir can read a dirent header past the end of its inline buffer, triggering a slab-out-of-bounds read during getdents64: BUG: KASAN: slab-out-of-bounds in...

CVE-2026-89785 fs/ntfs3: fix out-of-bounds read of INDEX_ROOT in reparse/objid init

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: fix out-of-bounds read of INDEXROOT in reparse/objid init ntfsreparseinit and ntfsobjidinit parse the index root of the $Extend/$Reparse and $Extend/$ObjId metafiles the INDEXROOT attributes named $R and $O. They read i...

CVE-2026-89786 ext4: fix out-of-bounds read in ext4_read_inline_dir()

In the Linux kernel, the following vulnerability has been resolved: ext4: fix out-of-bounds read in ext4readinlinedir ext4readinlinedir can read a dirent header past the end of its inline buffer, triggering a slab-out-of-bounds read during getdents64: BUG: KASAN: slab-out-of-bounds in...