5.5

CVE-2022-48648

sfc: fix null pointer dereference in efx_hard_start_xmit

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]
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.10 < 5.10.146
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.71
Linux ≫ Linux Kernel Version >= 5.16 < 5.19.12
Linux ≫ Linux Kernel Version6.0 Updaterc1
Linux ≫ Linux Kernel Version6.0 Updaterc2
Linux ≫ Linux Kernel Version6.0 Updaterc3
Linux ≫ Linux Kernel Version6.0 Updaterc4
Linux ≫ Linux Kernel Version6.0 Updaterc5
Linux ≫ Linux Kernel Version6.0 Updaterc6
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.23% 0.13
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/0a242eb2913a4aa3d6fbdb86559f27628e9466f3
Patch
https://git.kernel.org/stable/c/8547c7bfc0617e7184e4da65b9b96681fcfe9998
Patch
https://git.kernel.org/stable/c/b3b41d4d95d3822b2e459ecbc80d030ea6aec5e7
Patch
https://git.kernel.org/stable/c/b3b952168ee1f220ba729fa100fd9d5aa752eb03
Patch