CVE-2026-23243
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
RDMA/umad: Reject negative data_len in ib_umad_write
In the Linux kernel, the following vulnerability has been resolved: RDMA/umad: Reject negative data_len in ib_umad_write ib_umad_write computes data_len from user-controlled count and the MAD header sizes. With a mismatched user MAD header size and RMPP header length, data_len can become negative and reach ib_create_send_mad(). This can make the padding calculation exceed the segment size and trigger an out-of-bounds memset in alloc_send_rmpp_list(). Add an explicit check to reject negative data_len before creating the send buffer. KASAN splat: [ 211.363464] BUG: KASAN: slab-out-of-bounds in ib_create_send_mad+0xa01/0x11b0 [ 211.364077] Write of size 220 at addr ffff88800c3fa1f8 by task spray_thread/102 [ 211.365867] ib_create_send_mad+0xa01/0x11b0 [ 211.365887] ib_umad_write+0x853/0x1c80
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2be8e3ee8efd6f99ce454115c29d09750915021a | affected | git | 1371ef6b1ecf3676b8942f5dfb3634fb0648128e | Unavailable | None listed |
| 2be8e3ee8efd6f99ce454115c29d09750915021a | affected | git | 362e45fd9069ffa1523f9f1633b606ebf72060d7 | Unavailable | None listed |
| 2be8e3ee8efd6f99ce454115c29d09750915021a | affected | git | 6eb2919474ca105c5b13d19574e25f0ddcf19ca2 | Unavailable | None listed |
| 2be8e3ee8efd6f99ce454115c29d09750915021a | affected | git | a6a3e4af10993cb9e4b8f0548680aba0ab5f3b0d | Unavailable | None listed |
| 2be8e3ee8efd6f99ce454115c29d09750915021a | affected | git | 9c80d688f402539dfc8f336de1380d6b4ee14316 | Unavailable | None listed |
| 2be8e3ee8efd6f99ce454115c29d09750915021a | affected | git | 205955f29c26330b1dc7fdeadd5bb97c38e26f56 | Unavailable | None listed |
| 2be8e3ee8efd6f99ce454115c29d09750915021a | affected | git | 52ab82cc5cf8ada5c3fb6ffe8f32fdb2fc27a34b | Unavailable | None listed |
| 2be8e3ee8efd6f99ce454115c29d09750915021a | affected | git | 5551b02fdbfd85a325bb857f3a8f9c9f33397ed2 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2.6.24 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.24 | Unavailable | None listed |
| 5.10.252 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.202 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.165 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.128 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.75 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.14 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19.4 | unaffected | semver | Unavailable | 6.19.* | None listed |
| 7.0 | unaffected | original_commit_for_fix | Unavailable | * | None listed |