Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: s390/ptrace: handle setting of fpc register correctly If the content of the floating point control (fpc) register of a traced process is modified with the ptrace interface the new value is tested for validity by temporarily loading it into the fpc register. This may lead to corruption of the fpc register of the tracing process: if an interrupt happens while the value is temporarily loaded into the fpc register, and within interrupt context floating point or vector registers are used, the current fp/vx registers are saved with save_fpu_regs() assuming they belong to user space and will be loaded into fp/vx registers when returning to user space. test_fp_ctl() restores the original user space fpc register value, however it will be discarded, when returning to user space. In result the tracer will incorrectly continue to run with the value that was supposed to be used for the traced process. Fix this by saving fpu register contents with save_fpu_regs() before using test_fp_ctl().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 9977e886cbbc758b4b601a160b5825ba573b5ca8 before 6ccf904aac0292e1f6b1a1be6c407c414f7cf713; affected 9977e886cbbc758b4b601a160b5825ba573b5ca8 before 6d0822f2cc9b153bf2df49a84599195a2e0d21a8; affected 9977e886cbbc758b4b601a160b5825ba573b5ca8 before 856caf2730ea18cb39e95833719c02a02447dc0a; affected 9977e886cbbc758b4b601a160b5825ba573b5ca8 before 28a1f492cb527f64593457a0a0f0d809b3f36c25; affected 9977e886cbbc758b4b601a160b5825ba573b5ca8 before 7a4d6481fbdd661f9e40e95febb95e3dee82bad3; affected 9977e886cbbc758b4b601a160b5825ba573b5ca8 before 02c6bbfb08bad78dd014e24c7b893723c15ec7a1; affected 9977e886cbbc758b4b601a160b5825ba573b5ca8 before bdce67df7f12fb0409fbc604ce7c4254703f56d4; affected 9977e886cbbc758b4b601a160b5825ba573b5ca8 before 8b13601d19c541158a6e18b278c00ba69ae37829 |
| Linux / Linux | affected 4.3; unaffected 0 before 4.3; unaffected 4.19.307 through 4.19.*; unaffected 5.4.269 through 5.4.*; unaffected 5.10.210 through 5.10.*; unaffected 5.15.149 through 5.15.*; unaffected 6.1.77 through 6.1.*; unaffected 6.6.16 through 6.6.*; unaffected 6.7.4 through 6.7.*; unaffected 6.8 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/6ccf904aac0292e1f6b1a1be6c407c414f7cf713
- https://git.kernel.org/stable/c/6d0822f2cc9b153bf2df49a84599195a2e0d21a8
- https://git.kernel.org/stable/c/856caf2730ea18cb39e95833719c02a02447dc0a
- https://git.kernel.org/stable/c/28a1f492cb527f64593457a0a0f0d809b3f36c25
- https://git.kernel.org/stable/c/7a4d6481fbdd661f9e40e95febb95e3dee82bad3
- https://git.kernel.org/stable/c/02c6bbfb08bad78dd014e24c7b893723c15ec7a1
- https://git.kernel.org/stable/c/bdce67df7f12fb0409fbc604ce7c4254703f56d4
- https://git.kernel.org/stable/c/8b13601d19c541158a6e18b278c00ba69ae37829
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.
- https://git.kernel.org/stable/c/6ccf904aac0292e1f6b1a1be6c407c414f7cf713
- https://git.kernel.org/stable/c/6d0822f2cc9b153bf2df49a84599195a2e0d21a8
- https://git.kernel.org/stable/c/856caf2730ea18cb39e95833719c02a02447dc0a
- https://git.kernel.org/stable/c/28a1f492cb527f64593457a0a0f0d809b3f36c25
- https://git.kernel.org/stable/c/7a4d6481fbdd661f9e40e95febb95e3dee82bad3
- https://git.kernel.org/stable/c/02c6bbfb08bad78dd014e24c7b893723c15ec7a1
- https://git.kernel.org/stable/c/bdce67df7f12fb0409fbc604ce7c4254703f56d4
- https://git.kernel.org/stable/c/8b13601d19c541158a6e18b278c00ba69ae37829
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html