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CVE PROGRAM SOURCE RECORDUnscored

CVE-2023-53590

sctp: add a refcnt in sctp_stream_priorities to avoid a nested loop

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: sctp: add a refcnt in sctp_stream_priorities to avoid a nested loop With this refcnt added in sctp_stream_priorities, we don't need to traverse all streams to check if the prio is used by other streams when freeing one stream's prio in sctp_sched_prio_free_sid(). This can avoid a nested loop (up to 65535 * 65535), which may cause a stuck as Ying reported: watchdog: BUG: soft lockup - CPU#23 stuck for 26s! [ksoftirqd/23:136] Call Trace: <TASK> sctp_sched_prio_free_sid+0xab/0x100 [sctp] sctp_stream_free_ext+0x64/0xa0 [sctp] sctp_stream_free+0x31/0x50 [sctp] sctp_association_free+0xa5/0x200 [sctp] Note that it doesn't need to use refcount_t type for this counter, as its accessing is always protected under the sock lock. v1->v2: - add a check in sctp_sched_prio_set to avoid the possible prio_head refcnt overflow.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • a7555681e50bdebed2c40ff7404ee73c2e932993 to < cec326443f01283ef68ea00c06ea073b1835a562affected
  • 176ee6c673ccd118e9392fd2dbb165423bdb99ca to < 8ee401f89cdb10f39098c0656d695b2bc4052100affected
  • 0dfb9a566327182387c90100ea54d8426cee8c67 to < bf5540cbd20e2dae2c81ab9b31deef41ef147d0aaffected
  • 9ed7bfc79542119ac0a9e1ce8a2a5285e43433e9 to < 03c3a5584a0a29821e59b7834635ce823050caaaaffected
  • 9ed7bfc79542119ac0a9e1ce8a2a5285e43433e9 to < 6d529928ea212127851a2df8c40d822237ca946baffected
  • 9ed7bfc79542119ac0a9e1ce8a2a5285e43433e9 to < 68ba44639537de6f91fe32783766322d41848127affected
  • fa20f88271259d42ebe66f0a8c4c20199e888c99affected
  • 5.4.226 to < 5.4.235affected
  • 5.10.158 to < 5.10.173affected
  • 5.15.82 to < 5.15.100affected
  • 6.0.12 to < 6.1affected

Linux Linux

Default version status: affected

  • 6.1affected
  • 0 to < 6.1unaffected
  • 5.4.235 to ≤ 5.4.*unaffected
  • 5.10.173 to ≤ 5.10.*unaffected
  • 5.15.100 to ≤ 5.15.*unaffected
  • 6.1.18 to ≤ 6.1.*unaffected
  • 6.2.5 to ≤ 6.2.*unaffected
  • 6.3 to ≤ *unaffected

References