SB20261111179 - Ubuntu update for linux, linux-aws, linux-aws-fips and more

Description

This security bulletin contains information about 6 vulnerabilities.

1) Input validation error (CVE-ID: CVE-2025-39743)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation within the jfs_evict_inode() function in fs/jfs/inode.c. A local user can perform a denial of service (DoS) attack.

2) Use-after-free (CVE-ID: CVE-2025-39783)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the pci_epf_remove_cfs() function in drivers/pci/endpoint/pci-epf-core.c. A local user can escalate privileges on the system.

3) Buffer overflow (CVE-ID: CVE-2025-39810)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to memory corruption within the bnxt_set_xps_mapping(), bnxt_trim_dflt_sh_rings(), bnxt_set_dflt_rings() and bnxt_init_dflt_ring_mode() functions in drivers/net/ethernet/broadcom/bnxt/bnxt.c. A local user can escalate privileges on the system.

4) Resource management error (CVE-ID: CVE-2025-39824)

CWE-ID: CWE-399 - Resource Management Errors

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to resource management error within the asus_probe() function in drivers/hid/hid-asus.c. A local user can perform a denial of service (DoS) attack.

5) Out-of-bounds read (CVE-ID: CVE-2026-74350)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in the ocfs2 fast symlink read path when processing a malformed zero-cluster symlink inode. A local user can provide a crafted filesystem image containing an invalid fast symlink to disclose sensitive information.

The issue is triggered when the inline symlink payload is not NUL-terminated at the recorded size or when the recorded size exceeds the inline fast-symlink capacity.

6) Integer overflow (CVE-ID: CVE-2026-74394)

CWE-ID: CWE-190 - Integer overflow

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to integer overflow in the immediate data length check in the RDMA/srpt subsystem when processing user-supplied immediate data received over the network. A remote attacker can send a specially crafted network request with an oversized length value to cause a denial of service.

The length field is user-controlled and may wrap the computed request size, bypassing the bounds check before a very large length is passed to sg_init_one().

Remediation

Install update from vendor's website.

References

• https://ubuntu.com/security/notices/USN-9030-1