UBUNTU-CVE-2026-53174

In the Linux kernel, the following vulnerability has been resolved: ovl: keep err zero after successful ovlcacheget ovliteratemerged stores PTRERRcache in err before checking ISERRcache. On success err holds the truncated cache pointer and can be returned as a bogus non-zero error. The syzbot...

UBUNTU-CVE-2026-53235

In the Linux kernel, the following vulnerability has been resolved: net: add pskbmaypull to skbgroreceivelist skbgroreceivelist calls skbpullskb, skbgrooffsetskb without first ensuring the data is in the linear area via pskbmaypull. When the skb arrives via napigrofrags, skbheadlen can be 0 all...

EUVD-2026-39223

In the Linux kernel, the following vulnerability has been resolved: erofs: fix use-after-free on sbi-syncdecompress zerofsdecompresskickoff can race with filesystem unmount, causing a use-after-free on sbi-syncdecompress. When I/O completes, zerofsendio calls zerofsdecompresskickoff to queue...

CVE-2026-53267

In the Linux kernel, the following vulnerability has been resolved: netfilter: nftct: bail out on template ct in get eval I noticed this issue while looking at a historic syzbot report 1. A rule like the one below is enough to trigger the bug: table ip t chain pre type filter hook prerouting...

EUVD-2026-39210

In the Linux kernel, the following vulnerability has been resolved: ipv6: anycast: insert aca into global hash under idev-lock syzbot reported a splat 1: a slab-use-after-free in ipv6chkacastaddr, which walks the global inet6acaddrlst hash under RCU and dereferences a struct ifacaddr6 that has...

EUVD-2026-39207

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: RFCOMM: hold listener socket in rfcommconnectind rfcommgetsockbychannel scans rfcommsklist under the list lock, but returns the selected listener after dropping that lock without taking a reference. rfcommconnectind th...

CVE-2026-53255

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: validate advertising TLV before type checks tlvdataisvalid reads each advertising data field length from datai, then inspects datai + 1 for managed EIR types before checking that the current field still fits insi...

CVE-2026-53251

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: Fix not releasing hdev reference on isoconnbigsync hcigetroute returns a reference-counted hcidev pointer via hcidevhold. The function exits normally or with an error without ever releasing it...

CVE-2026-53243 rseq: Fix using an uninitialized stack variable in rseq_exit_user_update()

In the Linux kernel, the following vulnerability has been resolved: rseq: Fix using an uninitialized stack variable in rseqexituserupdate There is an bug in which an uninitialized stack variable is used in rseqexituserupdate as reported by syzbot: BUG: KMSAN: kernel-infoleak in rseqsetidsgetcsadd...

CVE-2026-53243

CVE-2026-53243 affects the Linux kernel component related to RSEQ (rseq_exit_user_update). The issue is an uninitialized stack variable used in the initialization of the struct rseq_ids, where ids.node_id is derived from ids.cpu_id before it is initialized, enabling potential information leakage....

CVE-2026-53239

In the Linux kernel, the following vulnerability has been resolved: xfrm: policy: fix use-after-free on inexact bin in xfrmpolicybyselctx Fix the race by pruning the bin while still holding xfrmpolicylock, before dropping it. Use xfrmpolicyinexactprunebin directly since the lock is already held...

CVE-2026-53235

Summary of technical details (CVE-2026-53235) : The Linux kernel GRO receive path had a bug in skb_gro_receive_list() where skb_pull(skb, skb_gro_offset(skb)) could run without ensuring the data is linear (missing pskb_may_pull() guard). When packets arrive via napi_gro_frags(), skb_headlen can b...

CVE-2026-53228 ipv6: sit: reload inner IPv6 header after GSO offloads

In the Linux kernel, the following vulnerability has been resolved: ipv6: sit: reload inner IPv6 header after GSO offloads ipip6tunnelxmit caches the inner IPv6 header pointer at function entry and continues using it after iptunnelhandleoffloads. For GSO skbs, iptunnelhandleoffloads calls...

EUVD-2026-39312

In the Linux kernel, the following vulnerability has been resolved: ip6vti: fix incorrect tunnel matching in vti6tnllookup In vti6tnllookup, when an exact match for a tunnel fails, the code falls back to searching for wildcard tunnels: - Tunnels matching the packet's local address, with any remot...

CVE-2026-53211

In the Linux kernel, the following vulnerability has been resolved: netfilter: nftmetabridge: fix stale stack leak via IIFHWADDR register NFTMETABRIIIFHWADDR declares its destination register with len = ETHALEN 6 bytes, which the register-init tracking rounds up to two 32-bit registers 8 bytes...

CVE-2026-53200

The CVE refers to the Linux kernel KVM on ARM64 where the XN bit handling was broken when FEAT_XNX is not enabled. Specifically, a FIELD_PREP() mask used to clear XN[0] manipulated the wrong bit, unconditionally granting execute permissions. The issue is resolved by correcting the bit manipulatio...

CVE-2026-53200 KVM: arm64: nv: Fix handling of XN[0] when !FEAT_XNX

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Fix handling of XN0 when !FEATXNX XN has already been extracted from its bitfield position so using FIELDPREP on the mask that clears XN0 is completely broken, having the effect of unconditionally granting execute...

CVE-2026-53198

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free of a deferred filelock on double SMB2CANCEL A deferred byte-range lock an SMB2LOCK that blocks registers an async work on conn-asyncrequests via setupasyncwork, with cancelfn = smb2removeblockedlock and...

CVE-2026-53174 ovl: keep err zero after successful ovl_cache_get()

In the Linux kernel, the following vulnerability has been resolved: ovl: keep err zero after successful ovlcacheget ovliteratemerged stores PTRERRcache in err before checking ISERRcache. On success err holds the truncated cache pointer and can be returned as a bogus non-zero error. The syzbot...

EUVD-2026-39265

In the Linux kernel, the following vulnerability has been resolved: ovl: keep err zero after successful ovlcacheget ovliteratemerged stores PTRERRcache in err before checking ISERRcache. On success err holds the truncated cache pointer and can be returned as a bogus non-zero error. The syzbot...