# CVE-2026-43440: kernel-docs: The SUSE Linux Enterprise 15 SP6 kernel was updated to fix various security issues:  The following security issues we...

CVE-2026-43440 is fixed in 17 products on 1 platform, first by DEBIAN-CVE-2026-43440, released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-43440
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0012
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 8, 2026

## Description

The SUSE Linux Enterprise 15 SP6 kernel was updated to fix various security issues:  The following security issues were fixed:  - CVE-2026-46056: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers (bsc#1267435). - CVE-2026-46193: xfrm: ah: account for ESN high bits in async callbacks (bsc#1267656). - CVE-2026-46324: netfilter: nf_tables: Introduce functions freeing nft_hook objects (bsc#1267995). - CVE-2026-52967: smb/client: fix possible infinite loop and oob read in symlink_data() (bsc#1269181). - CVE-2026-52986: netfilter: nf_conntrack_sip: don't use simple_strtoul (bsc#1269289). - CVE-2026-53050: quota: Fix race of dquot_scan_active() with quota deactivation (bsc#1269188). - CVE-2026-53129: fs/mbcache: cancel shrink work before destroying the cache (bsc#1269633). - CVE-2026-53131: netfilter: require Ethernet MAC header before using eth_hdr() (bsc#1269773). - CVE-2026-53224: sctp: validate embedded INIT chunk and address list lengths in cookie (bsc#1269997). - CVE-2026-53246: sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing (bsc#1269988). - CVE-2026-53250: xsk: cache csum_start/csum_offset to fix TOCTOU in xsk_skb_metadata() (bsc#1269808). - CVE-2026-53262: l2tp: pppol2tp: hold reference to session in pppol2tp_ioctl() (bsc#1270000). - CVE-2026-53267: netfilter: nft_ct: bail out on template ct in get eval (bsc#1269577). - CVE-2026-53354: arm64: errata: Mitigate TLBI errata on various Arm CPUs (bsc#1270230).     - CVE-2026-53375: drm/amdgpu/vce: Prevent partial address patches (bsc#1271899). - CVE-2026-53388: fuse: re-lock request before replacing page cache folio (bsc#1271825). - CVE-2026-53391: NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr (bsc#1271904). - CVE-2026-53402: fbdev: fbcon: fix out-of-bounds read in err_out of (bsc#1271908). - CVE-2026-63794: KVM: SVM: Fix page overflow in sev_dbg_crypt() for ENCRYPT path (bsc#1271964). - CVE-2026-63802: blk-cgroup: fix UAF in __blkcg_rstat_flush() (bsc#1272282). - CVE-2026-63806: KVM: Replace guest-triggerable BUG_ON() in ioeventfd datamatch with get_unaligned() (bsc#1272268). - CVE-2026-63807: KVM: x86/mmu: Ensure hugepage is in by slot before checking max mapping level (bsc#1272263). - CVE-2026-63824: KEYS: fix overflow in keyctl_pkey_params_get_2() (bsc#1272180). - CVE-2026-63826: fbdev: fix use-after-free in store_modes() (bsc#1272183). - CVE-2026-63829: net: ip_gre: require CAP_NET_ADMIN in the device netns for changelink (bsc#1272176). - CVE-2026-63884: drm/i915: Fix potential UAF in TTM object purge (bsc#1272573). - CVE-2026-63893: thunderbolt: property: Reject u32 wrap in tb_property_entry_valid() (bsc#1272607). - CVE-2026-63912: xfrm: esp: restore combined single-frag length gate (bsc#1272836). - CVE-2026-63917: ip6: vti: Use ip6_tnl.net in vti6_changelink() (bsc#1272904). - CVE-2026-63919: xfrm: input: hold netns during deferred transport reinjection (bsc#1272907). - CVE-2026-63921: ip6: vti: Use ip6_tnl.net in vti6_siocdevprivate() (bsc#1272918). - CVE-2026-63922,CVE-2026-63924: ipv6: exthdrs: refresh nh after handling HAO option (bsc#1272855). - CVE-2026-63946: Bluetooth: ISO: fix UAF in iso_recv_frame (bsc#1272665). - CVE-2026-63952: memfd: deny writeable mappings when implying SEAL_WRITE (bsc#1272468). - CVE-2026-63968: ipv6: fix possible infinite loop in fib6_select_path() (bsc#1272466). - CVE-2026-63971: sctp: fix race between sctp_wait_for_connect and peeloff (bsc#1272678). - CVE-2026-63975: Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp (bsc#1272694). - CVE-2026-63984: ipv6: rpl: fix hdrlen overflow in ipv6_rpl_srh_decompress() (bsc#1272865). - CVE-2026-63994: tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp() (bsc#1273035). - CVE-2026-64106: KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits (bsc#1272242). - CVE-2026-64189: netfilter: ipset: fix race between dump and ip_set_list resize (bsc#1272207). - CVE-2026-64560: posix-cpu-timers: Prevent UAF caused by non-leader exec() race (bsc#1273004). - CVE-2026-64561: KVM: x86: Check for invalid/obsolete root *after* making MMU pages available (bsc#1273231). - CVE-2026-64564: sctp: don't free the ASCONF's own transport in DEL-IP processing (bsc#1274072). - CVE-2026-64600: xfs: resample the data fork mapping after cycling ILOCK (bsc#1271526).  The following non security issues were fixed:  - Drivers: hv: vmbus: Set DMA coherent mask for VMBus devices (git-fixes). - hrtimers: Introduce hrtimer_setup() to replace hrtimer_init() (bsc#1271912). - ice: don't check has_ready_bitmap in E810 functions (bsc#1269981). - ice: factor out ice_ptp_rebuild_owner() (bsc#1269981). - ice: fix PTP Call Trace during PTP release (bsc#1269981). - ice: Fix PTP NULL pointer dereference during VSI rebuild (bsc#1269981). - ice: introduce PTP state machine (bsc#1269981). - ice: pass reset type to PTP reset functions (bsc#1269981). - ice: rename ice_ptp_tx_cfg_intr (bsc#1269981). - ice: rename verify_cached to has_ready_bitmap (bsc#1269981). - ice: stop destroying and reinitalizing Tx tracker during reset (bsc#1269981). - KVM: SVM: Mark VMCB_NPT as dirty on nested VMRUN (git-fixes). - KVM: SVM: Mark VMCB_PERM_MAP as dirty on nested VMRUN (git-fixes). - KVM: x86/mmu: Fix use-after-free on vendor module reload (git-fixes). - KVM: x86/mmu: Preserve nested TDP shadow page tables if they are used as roots (git-fixes). - KVM: x86/xen: Fix cleanup logic in emulation of Xen schedop poll hypercalls (git-fixes). - KVM: x86: Fix SRCU list traversal in kvm_fire_mask_notifiers() (git-fixes). - KVM: x86: Fix VM hard lockup after prolonged inactivity with periodic HV timer (git-fixes). - KVM: x86: hyper-v: Bound the bank index when querying sparse banks (git-fixes). - KVM: x86: hyper-v: Validate all GVAs during PV TLB flush (git-fixes). - mkspec-dtb: Skip missing DTBs. - net/sched: cls_api: Handle TC_ACT_CONSUMED in tcf_qevent_handle (bsc#1271866). - net: mana: Add Interrupt Moderation support (bsc#1271368). - net: mana: Return error code from mana_create_rxq() (git-fixes). - net: mana: Validate the packet length reported by the NIC (git-fixes). - pkspec-dtb: Fix dtb-al rename. - posix-cpu-timers: Cleanup the firing logic (bsc#1271912). - posix-cpu-timers: Correctly update timer status in posix_cpu_timer_del() (bsc#1271912). - posix-cpu-timers: Do not arm SIGEV_NONE timers (bsc#1271912). - posix-cpu-timers: Handle interval timers correctly in timer_get() (bsc#1271912). - posix-cpu-timers: Handle SIGEV_NONE timers correctly in timer_get() (bsc#1271912). - posix-cpu-timers: Handle SIGEV_NONE timers correctly in timer_set() (bsc#1271912). - posix-cpu-timers: Make k_itimer::it_active consistent (bsc#1271912). - posix-cpu-timers: Remove incorrect comment in posix_cpu_timer_set() (bsc#1271912). - posix-cpu-timers: Replace old expiry retrieval in posix_cpu_timer_set() (bsc#1271912). - posix-cpu-timers: Simplify posix_cpu_timer_set() (bsc#1271912). - posix-cpu-timers: Split up posix_cpu_timer_get() (bsc#1271912). - posix-cpu-timers: Use @now instead of @val for clarity (bsc#1271912). - posix-timers: Add proper state tracking (bsc#1271912). - posix-timers: Avoid direct access to hrtimer clockbase (bsc#1271912). - posix-timers: Clarify posix_timer_fn() comments (bsc#1271912). - posix-timers: Clear overrun in common_timer_set() (bsc#1271912). - posix-timers: Consolidate signal queueing (bsc#1271912). - posix-timers: Consolidate timer setup (bsc#1271912). - posix-timers: Cure si_sys_private race (bsc#1271912). - posix-timers: Document common_clock_get() correctly (bsc#1271912). - posix-timers: Expand timer_arm() callbacks with a boolean return value (bsc#1271912). - posix-timers: Polish coding style in a few places (bsc#1271912). - posix-timers: Retrieve interval in common timer_settime() code (bsc#1271912). - RDMA/mana_ib: initialize err for empty send WR lists (git-fixes). - sctp: validate embedded address parameter length (git-fixes). - time: Switch to hrtimer_setup() (bsc#1271912).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | dtb-aarch64 opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-64kb opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-64kb sles 15.7 | 6.4.0-150700.53.78.1 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-64kb sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-azure opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-azure sles 15.7 | 6.4.0-150700.53.78.1 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-azure sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-default opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-default sles 15.6 | 6.4.0-150600.23.130.1 | [SUSE-SU-2026:3602-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3602-1.md) | Oct 2, 2026 |
| Linux | kernel-default sles 15.7 | 6.4.0-150700.53.78.1 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-default sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23237-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23237-1.md) | Aug 11, 2026 |
| Linux | kernel-default-base opensuse-leap 16.0 | 6.12.0-160000.37.1.160000.2.19 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-default-base sles 15.6 | 6.4.0-150600.23.130.1.150600.12.60.3 | [SUSE-SU-2026:3602-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3602-1.md) | Oct 2, 2026 |
| Linux | kernel-default-base sles 15.7 | 6.4.0-150700.53.78.1.150700.17.43.2 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-default-base sles 16.0 | 6.12.0-160000.37.1.160000.2.19 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-docs opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-docs sles 15.6 | 6.4.0-150600.23.130.1 | [SUSE-SU-2026:3602-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3602-1.md) | Oct 2, 2026 |
| Linux | kernel-docs sles 15.7 | 6.4.0-150700.53.78.1 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-docs sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-kvmsmall opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-kvmsmall sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-livepatch-SLE15-SP6_Update_30 sles 15.6 | 1-150600.13.5.1 | [SUSE-SU-2026:3602-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3602-1.md) | Oct 2, 2026 |
| Linux | kernel-livepatch-SLE15-SP7-RT_Update_19 sles 15.7 | 1-150700.1.5.1 | [SUSE-SU-2026:3810-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3810-1.md) | Aug 26, 2026 |
| Linux | kernel-livepatch-SLE15-SP7_Update_20 sles 15.7 | 1-150700.15.3.2 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-obs-build opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-obs-build sles 15.6 | 6.4.0-150600.23.130.1 | [SUSE-SU-2026:3602-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3602-1.md) | Oct 2, 2026 |
| Linux | kernel-obs-build sles 15.7 | 6.4.0-150700.53.78.1 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-obs-qa opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-obs-qa sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-rt opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-source opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-source sles 15.6 | 6.4.0-150600.23.130.1 | [SUSE-SU-2026:3602-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3602-1.md) | Oct 2, 2026 |
| Linux | kernel-source sles 15.7 | 6.4.0-150700.53.78.1 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-source sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-syms opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-syms sles 15.6 | 6.4.0-150600.23.130.1 | [SUSE-SU-2026:3602-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3602-1.md) | Oct 2, 2026 |
| Linux | kernel-syms sles 15.7 | 6.4.0-150700.53.78.1 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-syms sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-zfcpdump opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-zfcpdump sles 15.7 | 6.4.0-150700.53.78.1 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-zfcpdump sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | linux Debian 14 | 6.19.10-1 | [DEBIAN-CVE-2026-43440](https://patchblox.com/security/data/fix/linux/debian-cve-2026-43440.md) | May 15, 2026 |

---

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