CVE-2026-68426— xfrm: fix stale skb->prev after async crypto steals a GSO segment
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | f53c723902d1ac5f0b0a11d7c9dcbff748dde74e< 33e1b0d25ca0d2818c635ff80e6aa0d295e08a98 | affected |
f53c723902d1ac5f0b0a11d7c9dcbff748dde74e< bbca7cc3b2b4b10afbfee99b81d9ee78f5423046 | affected | ||
f53c723902d1ac5f0b0a11d7c9dcbff748dde74e< 3f4c3919baf0944ad96580467c302bc6c7758b00 | affected | ||
4.16 | affected | ||
< 4.16 | unaffected | ||
6.18.42≤ 6.18.* | unaffected | ||
7.1.6≤ 7.1.* | unaffected | ||
7.2-rc4≤ * | unaffected |
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I. Basic Information for CVE-2026-68426
Vulnerability Information
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Vulnerability Title
xfrm: fix stale skb->prev after async crypto steals a GSO segment
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: xfrm: fix stale skb->prev after async crypto steals a GSO segment skb_gso_segment() leaves the segment list head with ->prev pointing at the last segment, an invariant validate_xmit_skb_list() relies on when it sets its tail pointer (tail = skb->prev). When validate_xmit_xfrm() walks a GSO list and some segments are stolen by async crypto (->xmit() returns -EINPROGRESS), those segments are unlinked from the list but the head ->prev is never updated. If the last segment is the one stolen, the returned head still has ->prev pointing at it, even though it is now owned by the crypto engine and may be freed. validate_xmit_skb_list() later does tail->next = skb, writing through that stale pointer -- a use-after-free. Repoint skb->prev at the last retained segment before returning.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-68426
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-68426 (3)
Same Patch Batch · Linux · 2026-08-10 · 345 CVEs total
| CVE-2026-68310 | wifi: mt76: mt7915: guard HE capability lookups | |
| CVE-2026-68320 | sctp: fix auth_chunk_list capacity check in sctp_auth_ep_add_chunkid | |
| CVE-2026-68319 | pds_core: fix deadlock between reset thread and remove | |
| CVE-2026-68318 | pds_core: fix use-after-free on workqueue during remove | |
| CVE-2026-68317 | pds_core: fix auxiliary device add/del races | |
| CVE-2026-68316 | accel: ethosu: Fix element size accounting for cmd stream validation | |
| CVE-2026-68315 | sctp: validate stream count in sctp_process_strreset_inreq() | |
| CVE-2026-68314 | net: mctp i3c: clean up notifier and buses if driver register fails | |
| CVE-2026-68313 | tipc: fix infinite loop in __tipc_nl_compat_dumpit | |
| CVE-2026-68312 | cifs: fix cifsFileInfo leak on kmalloc failure in deferred close drain paths | |
| CVE-2026-68311 | wifi: mt76: mt7925: guard link STA in decap offload | |
| CVE-2026-68305 | drm/xe/vf: Add drm_dev guards when detaching CCS read/write buffers | |
| CVE-2026-68300 | sctp: auth: verify auth requirement when auth_chunk is NULL | |
| CVE-2026-68301 | net: hsr: fix memory leak on slave unregistration by removing synced VLANs | |
| CVE-2026-68302 | amt: re-read skb header pointers after every pull | |
| CVE-2026-68303 | drm/vc4: hvs/v3d: Fix null dereference in unbind | |
| CVE-2026-68304 | wifi: brcmfmac: fix 802.1X-SHA256 call trace warning | |
| CVE-2026-68307 | wifi: mt76: mt7925: fix crash in reset link replay | |
| CVE-2026-68309 | wifi: mt76: connac: fix possible NULL-pointer deref in mt76_connac_mcu_uni_bss_he_tlv() | |
| CVE-2026-68308 | wifi: mt76: mt7996: check pointer returned by mt76_connac_get_he_phy_cap() |
Showing top 20 of 345 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-68428
KVM: x86/mmu: Fix use-after-free on vendor module reload - CVE-2026-68427
gpu: host1x: Fix use-after-free in host1x_bo_clear_cached_ma - CVE-2026-68425
IB/mad: Drop unmatched RMPP responses before reassembly - CVE-2026-68424
mtd: virt_concat: fix use-after-free in mtd_virt_concat_dest - CVE-2026-68423
mtd: virt_concat: fix use-after-free in mtd_virt_concat_dest
Same vendor: Linux
- CVE-2026-68428
KVM: x86/mmu: Fix use-after-free on vendor module reload - CVE-2026-68427
gpu: host1x: Fix use-after-free in host1x_bo_clear_cached_ma - CVE-2026-68425
IB/mad: Drop unmatched RMPP responses before reassembly - CVE-2026-68424
mtd: virt_concat: fix use-after-free in mtd_virt_concat_dest - CVE-2026-68423
mtd: virt_concat: fix use-after-free in mtd_virt_concat_dest
V. Comments for CVE-2026-68426
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