NULL Pointer Dereference Affecting kernel-rt package, versions *
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Test your applications- Snyk ID SNYK-CENTOS8-KERNELRT-6737494
- published 30 Apr 2024
- disclosed 28 Apr 2024
Introduced: 28 Apr 2024
CVE-2022-48647 Open this link in a new tabHow to fix?
There is no fixed version for Centos:8 kernel-rt.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt package and not the kernel-rt package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
sfc: fix TX channel offset when using legacy interrupts
In legacy interrupt mode the tx_channel_offset was hardcoded to 1, but that's not correct if efx_sepparate_tx_channels is false. In that case, the offset is 0 because the tx queues are in the single existing channel at index 0, together with the rx queue.
Without this fix, as soon as you try to send any traffic, it tries to get the tx queues from an uninitialized channel getting these errors: WARNING: CPU: 1 PID: 0 at drivers/net/ethernet/sfc/tx.c:540 efx_hard_start_xmit+0x12e/0x170 [sfc] [...] RIP: 0010:efx_hard_start_xmit+0x12e/0x170 [sfc] [...] Call Trace: <IRQ> dev_hard_start_xmit+0xd7/0x230 sch_direct_xmit+0x9f/0x360 __dev_queue_xmit+0x890/0xa40 [...] BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 [...] RIP: 0010:efx_hard_start_xmit+0x153/0x170 [sfc] [...] Call Trace: <IRQ> dev_hard_start_xmit+0xd7/0x230 sch_direct_xmit+0x9f/0x360 __dev_queue_xmit+0x890/0xa40 [...]
References
- https://access.redhat.com/security/cve/CVE-2022-48647
- https://git.kernel.org/stable/c/360910b88d1466a90644a4e0533803b594344a2b
- https://git.kernel.org/stable/c/5f623a77cfc2d501d72bcb4f9ee71721e6c766ff
- https://git.kernel.org/stable/c/b4afd3878f961d3517f27b3213730fceef77945c
- https://git.kernel.org/stable/c/f232af4295653afa4ade3230462b3be15ad16419