Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Bound i2c->length in I2C bsg handlers struct qla_i2c_access carries a 16-bit length field alongside a fixed 64-byte buffer: struct qla_i2c_access { uint16_t device, offset, option, length; uint8_t buffer[0x40]; } __packed; qla2x00_write_i2c() and qla2x00_read_i2c() use the user-supplied i2c->length without any bounds check. i2c is overlaid on a 256-byte on-stack buffer and sfp is a 256-byte DMA-pool buffer, so a length up to 65535 overruns both: - write: memcpy(sfp, i2c->buffer, i2c->length) over-reads the stack and over-writes the sfp heap buffer, and qla2x00_write_sfp() then DMAs i2c->length bytes out of the 256-byte buffer. - read: qla2x00_read_sfp() DMAs i2c->length bytes into the 256-byte sfp, then memcpy(i2c->buffer, sfp, i2c->length) overflows the 64-byte buffer inside the on-stack array. A caller holding CAP_SYS_RAWIO can use this to corrupt the heap and the kernel stack. Reject requests whose length exceeds the buffer before any copy or DMA transfer in both handlers.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae before 8f01f886cc5e7bbc16cbf1a9928fdebbc911e973; affected 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae before 2be39946abcde5a6416fb074ef728429e246a996; affected 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae before 522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0e; affected 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae before 9a756f277eb89f769dbf380f38245c270d31fdb5; affected 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae before 32d6df14fdab71fe1ba304fd9a0db0411ea2e043; affected 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae before 97ca58b0fb026799b99e3d552d5f69cf9a3113ad; affected 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae before 47049fdadc0eaa115e813735b827e1379c0d2cf8; affected 9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae before 0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59 |
| Linux / Linux | affected 3.7; unaffected 0 before 3.7; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/8f01f886cc5e7bbc16cbf1a9928fdebbc911e973
- https://git.kernel.org/stable/c/2be39946abcde5a6416fb074ef728429e246a996
- https://git.kernel.org/stable/c/522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0e
- https://git.kernel.org/stable/c/9a756f277eb89f769dbf380f38245c270d31fdb5
- https://git.kernel.org/stable/c/32d6df14fdab71fe1ba304fd9a0db0411ea2e043
- https://git.kernel.org/stable/c/97ca58b0fb026799b99e3d552d5f69cf9a3113ad
- https://git.kernel.org/stable/c/47049fdadc0eaa115e813735b827e1379c0d2cf8
- https://git.kernel.org/stable/c/0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59