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CVE-2024-26826— mptcp: fix data re-injection from stale subflow

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.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于没有检查 RTX 队列中是否存在任何未确认的数据。

CVSS 7.5 · High EPSS 0.65% · P50

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 1e1d9d6f119c55c05e8ea78ed3e49046690abffd< 6f95120f898b40d13fd441225ef511307853c9c2 affected
1e1d9d6f119c55c05e8ea78ed3e49046690abffd< 6673d9f1c2cd984390550dbdf7d5ae07b20abbf8 affected
1e1d9d6f119c55c05e8ea78ed3e49046690abffd< b609c783c535493aa3fca22c7e40a120370b1ca5 affected
1e1d9d6f119c55c05e8ea78ed3e49046690abffd< 624902eab7abcb8731b333ec73f206d38d839cd8 affected
1e1d9d6f119c55c05e8ea78ed3e49046690abffd< b6c620dc43ccb4e802894e54b651cf81495e9598 affected
5.15 affected
< 5.15 unaffected
5.15.149≤ 5.15.* unaffected
… +4 more rows
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I. Basic Information for CVE-2024-26826

Vulnerability Information
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Vulnerability Title
mptcp: fix data re-injection from stale subflow
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mptcp: fix data re-injection from stale subflow When the MPTCP PM detects that a subflow is stale, all the packet scheduler must re-inject all the mptcp-level unacked data. To avoid acquiring unneeded locks, it first try to check if any unacked data is present at all in the RTX queue, but such check is currently broken, as it uses TCP-specific helper on an MPTCP socket. Funnily enough fuzzers and static checkers are happy, as the accessed memory still belongs to the mptcp_sock struct, and even from a functional perspective the recovery completed successfully, as the short-cut test always failed. A recent unrelated TCP change - commit d5fed5addb2b ("tcp: reorganize tcp_sock fast path variables") - exposed the issue, as the tcp field reorganization makes the mptcp code always skip the re-inection. Fix the issue dropping the bogus call: we are on a slow path, the early optimization proved once again to be evil.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于没有检查 RTX 队列中是否存在任何未确认的数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1e1d9d6f119c55c05e8ea78ed3e49046690abffd ~ 6f95120f898b40d13fd441225ef511307853c9c2 -
Linux Linux 5.15 -

II. Public POCs for CVE-2024-26826

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III. Intelligence Information for CVE-2024-26826

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Other References for CVE-2024-26826 (5)

Same Patch Batch · Linux · 2024-04-17 · 100 CVEs total

CVE-2024-26853 9.8 CRITICAL igc: avoid returning frame twice in XDP_REDIRECT
CVE-2024-26877 9.8 CRITICAL crypto: xilinx - call finalize with bh disabled
CVE-2024-26828 9.4 CRITICAL cifs: fix underflow in parse_server_interfaces()
CVE-2024-26856 8.8 HIGH net: sparx5: Fix use after free inside sparx5_del_mact_entry
CVE-2024-26822 8.7 HIGH smb: client: set correct id, uid and cruid for multiuser automounts
CVE-2024-26830 8.4 HIGH i40e: Do not allow untrusted VF to remove administratively set MAC
CVE-2024-26890 7.8 HIGH Bluetooth: btrtl: fix out of bounds memory access
CVE-2024-26883 7.8 HIGH bpf: Fix stackmap overflow check on 32-bit arches
CVE-2024-26824 7.8 HIGH crypto: algif_hash - Remove bogus SGL free on zero-length error path
CVE-2024-26870 7.8 HIGH NFSv4.2: fix nfs4_listxattr kernel BUG at mm/usercopy.c:102
CVE-2024-26823 7.8 HIGH irqchip/gic-v3-its: Restore quirk probing for ACPI-based systems
CVE-2024-26911 7.8 HIGH drm/buddy: Fix alloc_range() error handling code
CVE-2024-26869 7.8 HIGH f2fs: fix to truncate meta inode pages forcely
CVE-2024-26838 7.8 HIGH RDMA/irdma: Fix KASAN issue with tasklet
CVE-2024-26865 7.8 HIGH rds: tcp: Fix use-after-free of net in reqsk_timer_handler().
CVE-2024-26864 7.8 HIGH tcp: Fix refcnt handling in __inet_hash_connect().
CVE-2024-26872 7.8 HIGH RDMA/srpt: Do not register event handler until srpt device is fully setup
CVE-2024-26895 7.8 HIGH wifi: wilc1000: prevent use-after-free on vif when cleaning up all interfaces
CVE-2024-26852 7.8 HIGH net/ipv6: avoid possible UAF in ip6_route_mpath_notify()
CVE-2024-26898 7.8 HIGH aoe: fix the potential use-after-free problem in aoecmd_cfg_pkts

Showing top 20 of 100 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-26826

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