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TI-2024-30067 Aliases CVE-2024-44951GHSA-qx5p-7g35-jj49

serial: sc16is7xx: fix TX fifo corruption

Priority LOW 33CWE-667Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-667 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: serial: sc16is7xx: fix TX fifo corruption Sometimes, when a packet is received on channel A at almost the same time as a packet is about to be transmitted on channel B, we observe with a logic analyzer that the received packet on channel A is transmitted on channel B. In other words, the Tx buffer data on channel B is corrupted with data from channel A. The problem appeared since commit 4409df5866b7 ("serial: sc16is7xx: change EFR lock to operate on each channels"), which changed the EFR locking to operate on each channel instead of chip-wise. This commit has introduced a regression, because the EFR lock is used not only to protect the EFR registers access, but also, in a very obscure and undocumented way, to protect access to the data buffer, which is shared by the Tx and Rx handlers, but also by each channel of the IC. Fix this regression first by switching to kfifo_out_linear_ptr() in sc16is7xx_handle_tx() to eliminate the need for a shared Rx/Tx buffer. Secondly, replace the chip-wise Rx buffer with a separate Rx buffer for each channel.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00209 11th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 6.1.191, 6.6.160, 6.8 +2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux6.1.76 to before 6.1.191; 6.6.15 to before 6.6.160; 6.7.3 to before 6.86.1.191, 6.6.160, 6.8Patch availableCNA
LinuxLinux6.8 and later6.1.191, 6.6.160, 6.10.5, 6.11Patch availableCNA
  • Linux VendorLinux Affected 6.1.76 to before 6.1.191; 6.6.15 to before 6.6.160; 6.7.3 to before 6.8 Fixed in 6.1.191, 6.6.160, 6.8 Patch available CNA
  • Linux VendorLinux Affected 6.8 and later Fixed in 6.1.191, 6.6.160, 6.10.5, 6.11 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*6.1.76 to before 6.2; 6.6.15 to before 6.7; 6.7.3 to before 6.8; 6.8 to before 6.10.5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*6.11 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*6.11 rc2VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.1.76 to before 6.2; 6.6.15 to before 6.7; 6.7.3 to before 6.8; 6.8 to before 6.10.5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:* Versions 6.11 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:* Versions 6.11 rc2 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.1.191, 6.6.160, 6.8
  • Fix · CNA Linux (Linux) Fixed in 6.1.191, 6.6.160, 6.10.5, 6.11

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-44951
  2. 2026-10-03 Alias added: GHSA-qx5p-7g35-jj49
  3. 2026-10-21 Fix available: Linux/Linux@2a0ba376cdf729b5c66226c65c6c7cf9de744d52, Linux/[email protected] · CNA
  4. 2026-10-21 1 new reference · CNA
  5. 2026-10-30 Fix available: Linux/Linux@263682f5669ceeb70b14b4eda209fb34d67331ec, Linux/[email protected] · CNA
  6. 2026-10-30 1 new reference · CNA

References

Patch 2

Other 2

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences