CVE-2022-48648
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…
Does this matter?
Lower severity and a low EPSS score (0.23%). Track it; it rarely justifies an emergency change on its own.
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]
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.23% probability · 13th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0a242eb2913a4aa3d6fbdb86559f27628e9466f3Patch
- https://git.kernel.org/stable/c/8547c7bfc0617e7184e4da65b9b96681fcfe9998Patch
- https://git.kernel.org/stable/c/b3b41d4d95d3822b2e459ecbc80d030ea6aec5e7Patch
- https://git.kernel.org/stable/c/b3b952168ee1f220ba729fa100fd9d5aa752eb03Patch
- https://git.kernel.org/stable/c/0a242eb2913a4aa3d6fbdb86559f27628e9466f3Patch
- https://git.kernel.org/stable/c/8547c7bfc0617e7184e4da65b9b96681fcfe9998Patch
- https://git.kernel.org/stable/c/b3b41d4d95d3822b2e459ecbc80d030ea6aec5e7Patch
- https://git.kernel.org/stable/c/b3b952168ee1f220ba729fa100fd9d5aa752eb03Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.