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Vulnerability · Published Apr 28, 2024 · Assigned by Linux

CVE-2022-48648sfc: fix null pointer dereference in efx_hard_start_xmit

Medium 5.5

In plain English

A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 86.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: sfc: fix null pointer dereference in efx_hard_start_xmit Trying to get the channel from the tx_queue variable here is wrong because we can only be here if tx_queue is NULL, so we shouldn't dereference it. As the above comment in the code says, this is very unlikely to happen, but it's wrong anyway so let's fix it. I hit this issue because of a different bug that caused tx_queue to be NULL. If that happens, this is the error message that we get here: BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 [...] RIP: 0010:efx_hard_start_xmit+0x153/0x170 [sfc]

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.0.2-1DEBIAN-CVE-2022-48648
Debian:13linux6.0.2-1DEBIAN-CVE-2022-48648
Debian:14linux6.0.2-1DEBIAN-CVE-2022-48648
Ubuntu:22.04:LTSlinux5.15.0-57.63UBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-aws5.15.0-1027.31UBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-azure5.15.0-1030.37UBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1030.37.1UBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-gcp5.15.0-1026.33UBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-gke5.15.0-1024.29UBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1012.16UBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-ibm5.15.0-1022.25UBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1023.28UBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-kvm5.15.0-1025.30UBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-57.63UBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1015.15UBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-oracle5.15.0-1026.32UBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-raspi5.15.0-1022.24UBUNTU-CVE-2022-48648
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2022-48648
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2022-48648

Affected products (as reported)

VendorProductVersions
Linux Linux 12804793b17c0e19115a90d98f2f3df0cb79e233 – before b3b41d4d95d3822b2e459ecbc80d030ea6aec5e712804793b17c0e19115a90d98f2f3df0cb79e233 – before 8547c7bfc0617e7184e4da65b9b96681fcfe999812804793b17c0e19115a90d98f2f3df0cb79e233 – before b3b952168ee1f220ba729fa100fd9d5aa752eb0312804793b17c0e19115a90d98f2f3df0cb79e233 – before 0a242eb2913a4aa3d6fbdb86559f27628e9466f3
Linux Linux 5.10

References