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CVE-2026-74588— sctp: keep chunk->transport in step with the list it is queued on

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，已修复以下漏洞： sctp：确保 chunk->transport 与所在传输列表保持一致 __sctp_outq_flush_rtx() 函数在将已被间隙确认（gap-acked）的数据块移动到另一个传输实体的已传输列表时，未更新 chunk->transport 指针： 此时，该数据块位于一个活跃传输实体的列表中，但 chunk->transport 仍指向另一个不同的传输实体。如果该（原）传输实体被移除（例如通过 ASCONF Delete-IP 操作调用 sctp_assoc_rm_

AI Predicted 8.1 Difficulty: Moderate EPSS 0.22% · P13

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 6575fb17230814b48b471727c8410c0aadff9274 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 6b9e2ea2057113f3393990ba646d2d97c719a80d affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 874a7c2b5e184f06134fdfde27e9ce9271bafe58 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 1adf929121e13e0b19200bb9fef715b918d483fe affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< e2e7c1de0e226ca1b7fea2de57a6c9bca408709b affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 2b3b5eec8b2c30ee237e3c31a6a38de9c39d804d affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 5ccf35ef0ed6059cdf8b1f4606a6584d5b67166b affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 9f2cf069a9a72a2d6b97ca8b4c70e714aac99749 affected
… +10 more rows
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I. Basic Information for CVE-2026-74588

Vulnerability Information
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Vulnerability Title
sctp: keep chunk->transport in step with the list it is queued on
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: sctp: keep chunk->transport in step with the list it is queued on __sctp_outq_flush_rtx() moves a gap-acked chunk onto another transport's transmitted list without updating chunk->transport: if (chunk->tsn_gap_acked) { list_move_tail(&chunk->transmitted_list, &transport->transmitted); continue; } The chunk then sits on a live transport's list while chunk->transport still names a different one. If that transport is removed - sctp_assoc_rm_peer() from an ASCONF Delete-IP - sctp_transport_free() RCU-frees it and the chunk is left with a dangling pointer. sctp_assoc_rm_peer() scrubs peer->transmitted and asoc->outqueue.out_chunk_list, but the chunk is on neither. The pointer is not followed while tsn_gap_acked is set. A SACK that reneges on the TSN clears the flag, and the next SACK reaches tchunk->transport->flight_size -= sctp_data_size(tchunk); inside the freed transport. KASAN reports a slab-use-after-free read in sctp_check_transmitted(), freed from sctp_assoc_rm_peer(). Both the removal and the SACKs come from the association peer. Set chunk->transport at the move. The ordinary resend path needs nothing: it reaches its list_move_tail() only after sctp_packet_append_chunk() returned SCTP_XMIT_OK, and __sctp_packet_append_chunk() has rebound the chunk by then. Discovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ 6575fb17230814b48b471727c8410c0aadff9274 -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2026-74588

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III. Intelligence Information for CVE-2026-74588

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Patches & Fixes for CVE-2026-74588 (7)

Same Patch Batch · Linux · 2026-08-22 · 150 CVEs total

CVE-2026-74640 ALSA: FCP: fix OOB write in fcp_meter_ctl_get()
CVE-2026-74622 net: atlantic: free RX pages of consumed but not refilled buffers
CVE-2026-74623 net: atlantic: free stranded TX buffers on ring deinit
CVE-2026-74624 netfilter: nf_conntrack: defer invalid log until after unlock
CVE-2026-74625 netfilter: bridge: release template ct on non-IP path
CVE-2026-74627 net: devmem: prevent net-iov / page mixing
CVE-2026-74626 NTB: ntb_netdev: Preserve RX queue depth on allocation failure
CVE-2026-74628 net/x25: fix use-after-free of the socket by its timers
CVE-2026-74629 net/dibs: Correct freeing of dmb_clientid_arr
CVE-2026-74631 net: smc: fix splice entry lifetime imbalance in smc_rx_splice
CVE-2026-74630 ipv6: prevent in6_dev_get() from resurrecting inet6_dev
CVE-2026-74632 mm/huge_memory: fix huge_zero_pfn race
CVE-2026-74633 tracing: Fix NULL pointer dereference in module event cache removal
CVE-2026-74634 ring-buffer: Prevent subbuf order change when resizing is disabled
CVE-2026-74635 fbdev: bitblit: bound-check glyph index in bit_cursor()
CVE-2026-74636 tracing: Fix race between update_event_fields and, event_define_fields
CVE-2026-74637 perf/core: Fix group leader use-after-free after sibling detach
CVE-2026-74639 ALSA: us144mkii: re-anchor capture URBs on resubmission
CVE-2026-74638 drm/v3d: Serialize the scheduler timeout handlers
CVE-2026-74651 staging: rtl8723bs: fix OOB read in rtw_get_wpa_ie()

Showing top 20 of 150 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74588

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