Unknown [CVE-2025-37849 +2] Kernel Live Patch Security Notice
This security Red Hat Linux advisory covers CVE-2025-37849 and CVE-2026-23112 and 1 more CVE affecting Ubuntu 24.04, Ubuntu 22.04, Ubuntu 20.04.
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Summary
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Tear down vGIC on failed vCPU creation If kvm_arch_vcpu_create() fails to share the vCPU page with the hypervisor, we propagate the error back to the ioctl but leave the vGIC vCPU data initialised.
In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: add bounds checks in nvmet_tcp_build_pdu_iovec nvmet_tcp_build_pdu_iovec() could walk past cmd->req.sg when a PDU length or offset exceeds sg_cnt and then use bogus sg->length/offset values, leading to _copy_to_iter() GPF/KASAN.
It was discovered that the Linux kernel algif_aead module did not properly handle in-place cryptographic operations. This flaw is known as Copy Fail.
A local attacker could use this to escalate privileges, or possibly escape a container.)(CVE-2026-31431) Affected Ubuntu releases: 24.04, 22.04, 20.04, 18.04.
Affected products named by the advisory: Ubuntu 24.04; Ubuntu 22.04; Ubuntu 20.04; Ubuntu 18.04.
CISA Known Exploited Vulnerability
- Listed:
- May 1, 2026 · federal remediation due May 15, 2026
- Required action:
- "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- Ransomware use:
- Unknown
KEV is a prioritization signal from CISA — remediation detail still comes from the vendor advisory.
- Ubuntu 24.04
- Ubuntu 22.04
- Ubuntu 20.04
- Ubuntu 18.04
Official advisory · medium-confidence parse· fetched 2 months ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Apply available updates: `sudo apt update && sudo apt upgrade` (a standard system update installs the fix).
Official advisory · medium-confidence parse· fetched 2 months ago·verify at source
Discussion(0)
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